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Compositae (Asteraceae)

Feverfew is a member of the Compositae Family.

Kansas may not have the most unusual state flower, but it has the most, in the form of a sunflower. Only black eyed Susan of Maryland, sagebrush of Nevada, and Goldenrod of Kentucky and Nebraska have similar composite flowers, which are actually composed of many minute flowers known as ‘florets’. Yet, none are as large, and therefore not as abundant as the sunflower of Kansas.

Bluebonnet, yucca, lilac and red clover, the state flowers of Texas, New Mexico, New Hampshire and Vermont respectively all bloom with flower trusses that support many individual flowers. Composite flowers of the family Compositae are somewhat more efficient, with their individual florets so tightly arranged that they seem to be individual flowers. Sagebrush and goldenrod actually take this technique a step further, by producing trusses that support many composite flowers; an abundance of abundance!

Composite flowers are so efficient that they actually assign specific tasks to their various members. The outer florets around the margins of larger composite flowers are the ‘ray’ florets that function as petals. They are big, flashy and colorful, to attract bees and other pollinators, but are typically sterile, so can not produce seeds.

The smaller central ‘disc’ florets actually do the work of getting pollinated and producing seed. Because of the efficiency of the ray florets, they do not need to attract attention. They are low and dense, ideal landing pads for bees delivering and collecting pollen. They literally get pollinated as they get trampled.

The showiest composite flowers have disproportionately large ray florets, like chrysanthemums, dahlias, daisies, cosmos, black eyed Susans and  echinacea. Some of the bulkiest and boldest chrysanthemums actually lack disc florets, and produce only colorful but sterile ray florets. The smaller and more colorful sunflowers have more prominent ray florets than the humungous and mostly yellow sunflowers that have more prominent and abundant disc florets.

Other composite flowers impress their pollinators in a more subdued style, by instead producing more appealing disc florets. Lavender cotton and some marigolds actually lack ray florets. Most composite flowers that use this technique are yellow or orange, and quite compact.

There are not many composite flowers that lack aromatic foliage. Daisies and chrysanthemums are actually objectionable to some. It is a wonder than there are insects that eat them! Feverfew and chamomile are instead appreciated for their aroma and flavor.

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Horridculture – Common Names

Snowdrop is Galanthus nivalis. Snowflake is Leucojum vernum. Snowdrop is the rarer of the two. I have seen it only in pictures from other regions. The potential for consequences of its misidentification are therefore quite minimal. That is fortunate. I learned Leucojum vernum as snowdrop. Locally, no one ever corrected this transgression, probably because no one here was aware that it was a transgression. Most likely learned it the same as I did. Similarly, we learned heaths as heathers. Since heathers are very rare here, there is not much to compare heaths to. Fortunately, snowdrop, snowflake, heath and heather all have botanical names, which are universally the same everywhere. Well, at least they should be. During the past few years, I have noticed that the tree that I leaned as Eucalyptus pulverulenta is now Eucalyptus cinerea, and what I knew as Eucalyptus cinerea is now Eucalyptus pulverulenta. It is as if the two have simply traded names. Now that more information than ever in history is so readily available online, it is amazing what information is unavailable. I can confirm the identity of neither species of Eucalyptus! Many modern cultivars, particularly hybrids, lack species names between their genus name and cultivar name, as if such designations are no longer important. In that regard, their botanical names are no more defining than their common names. At least some of the common names are entertaining, such as pig face, pig squeak, chicken liver plant, brazen hussy, naked lady, twisty baby, mother-in-law’s tongue, sneezewort, shaggy soldier, corpse flower, sticky monkey flower, bear’s breeches, sticky willy, turkey tangle frog fruit, laurel-leaf snail seed, love in a mist, love in a puff, dead nettle, butter and eggs, teasel, fleabane and yesterday, today and tomorrow. Goodness, that is a big list, and it could go on.

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Horridculture – African

Delegates from Arabia, Africa, Germany Pakistan and (almost) Turkey

‘The Rescuers’ is an animated movie for children from 1977 that features the Rescue Aid Society, which is an international organization of mice. (I am trying to be very brief with this description. Besides, I do not know much about it.) Delegates of the Rescue Aid Society represent various countries, such as Arabia, Germany, Pakistan, Turkey and Africa. Yes, ‘Africa’. Although one can assume that ‘Arabia’ refers to Saudi Arabia, it could refer to the entire region, which includes several countries. Similarly, although one can assume that ‘Germany’ refers to West Germany, it could refer to both West Germany and East Germany, which were still separate countries in 1977. ‘Africa’, though, is not so easily dismissed. It is an entire continent, which includes more countries than any other continent. Horticulturally, Africa does not get much more regard. African sumac, African daisy, African iris, African violet and African tulip tree are all from Africa, but their names reveal no more than that about their origin. Italian cypress, English holly, French lavender, Norway spruce and Grecian bay all have names that are more descriptive about their European origins. Similarly, the names of Japanese boxwood, Chinese elm, Korean fir, Burmese honeysuckle and Indian laurel describe their Asian origins. The names of California fan palm, Oregon grape, Virginia creeper, Texas bluebonnet and Arizona cypress are even more descriptive, by designating individual States within the United States of America, which is within the continent of North America. Here in California, some common names are even more regionally descriptive, such as Monterey pine, Santa Cruz cypress, Santa Barbara daisy, San Francisco campion and Montara manzanita. Although most of these examples are unknown or rare beyond their native ranges, a few are quite common elsewhere. Yet, somehow, most of what was exported from Africa is merely ‘African’.

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Bromeliads Are . . . Weird.

Tillandsias, to the left and right, as well as Spanish moss, which hangs downward throughout, are types of bromeliads.

After certain botany classes, some of my Cal Poly colleagues and I found it difficult to enjoy eating certain fruits and vegetables like we did previously. Simple things like pineapples, figs, potatoes and Brussels’s sprouts were much less appealing, or even unappealing, once we discovered what they really are. Yet, we also gained a bit more respect for these seemingly weird plants. Even though their adaptations do not always make sense to us, and some adaptations are a bit outdated by a few thousand centuries, or much more, many plants are remarkably adapted to their particular situations within their natural environments.      

Pineapple is still one of my less favorite ‘fruit’. However, the related bromeliads, of the family Bromeliaceae, are fascinating. Almost all are ‘stemless perennials’ with basal rosettes of foliage. (Their ‘stems’ are actually out of sight below their foliage.) Most are epiphytes that live within the canopies of larger trees or on exposed rock formations, sustained by whatever organic matter that happens to fall onto them from above. They are consequently very well adapted to confinement in pots, so can be quite happy as houseplants. A few bromeliads that live in deserts or other comparably harsh environments actually resemble yuccas.

Some people like to water large bromeliads  in the ‘reservoirs’ formed by the densely set leaves at the middles of the foliar rosettes. In the wild, these reservoirs naturally collect rainwater to use during drier weather. Bromeliads can either absorb moisture directly from their reservoirs through their leaves, or they release some of the water between their foliage to their roots below as their leaves lose turgidity (wilt slightly) because of a lack of rainfall or humidity. Either way, bromeliads really know how to conserve and ration water accordingly.

Many bromeliads are appreciated for their unusually colorful and often strangely textured foliage. Many have very interesting or downright strange flowers that mostly stand high above their foliage. The flashiest bromeliads have all of the above ; oddly textured and colorful foliage with interesting flower trusses outfitted with bracts (modified leaves that adorn flowers) that are so colorful that it is difficult to know where the foliage ends and the flowers begin.   

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More Palm Silliness

Mexican fan palm, Washingtonia robusta

Mexican fan palm, Washingtonia robusta, is the most familiar palm throughout most of California. It is most typically groomed to remove deteriorated leaves without removing the associated toughly fibrous petiole bases that form a neat lattice-like sweater of stubble around its trunks. Some are groomed to also remove the stubble, leaving a clean shaven and leaner looking trunk. Some are shaven only part way up, with a sweater higher up. Without grooming, or if grooming discontinues, some accumulate beards of deteriorated leaves. Although generally harmless, such beards are combustible and can be infested with rats. On rare occasion, they become dislodged from their trunks and fall. They are dangerously heavy and very messy. This silly looking Mexican fan palm was groomed part way up, and then neglected long enough to accumulate a significant beard. The beard then fell, leaving the bare trunk exposed. Only the few lowest of the old leaves remain below where the beard was. A new beard is now forming above.

Queen palm, Arecastrum romanzoffianum, was an uncommon palm until it suddenly became very popular and almost too common through the 1990s. By that time, selective breeding produced the standardized modern variety, which is a bit greener, fluffier and more vigorous than most old specimens. Although it is a bit more genetically conformative than old specimens, it still exhibits genetic variability. Unless some are cloned by tissue culture, all are grown from seed. Some grow slower, so stay shorter. Some develop unusually plump trunks. Some are unusually floppy. This one is just weird. Its foliar canopy is so strictly narrow that it resembles the locally rare Andean wax palm, Ceroxylon quindiuense. Perhaps it actually is an Andean wax palm! A pindo palm, Butia capitata, lives in the associated front garden, and it is not exactly common.

queen palm, Arecastrum romanzoffianum or Andean wax palm, Ceroxylon quindiuense or something else?
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Palm Ignorance

Bismarckia nobilis

Many years ago and before I started writing my gardening column in response to all the horticultural misinformation that I had been observing in the San Jose Mercury News, I heard some of the most idiotic commentary I have ever heard about palms on the radio. I do not remember what radio station it was broadcast from, but it was likely in San Jose. The commentator was expressing his disapproval of the many mature palms that were being incorporated into public landscapes there at the time. He started by stating that, “There are two kinds of palms . . . ” Well, that certainly got my attention. He continued to say, ” . . . the tall skinny kind and the short fat kind.” Wow, I can not forget a comment like that. I knew that he was referring to Mexican fan palm and Canary Island date palm, which were and probably still are the most common palms in San Jose. Also, they were the two species that were so commonly installed into public landscapes at the time. There was no mention of queen palm, windmill palm, Mediterranean fan palm or California fan palm, all of which also inhabit San Jose. Since then, queen palm and the formerly rare pygmy date palm have become more common than they had been. Hesper palm remains rare. I brought three distinct species of bamboo palm from Los Angeles, and would like to bring a few more of the palms that perform well there, even if they do not perform so well here. I happen to be fond of the few types of king palm. I very much want to procure Bismarck palm like this one. Although still uncommon in Los Angeles, it is not completely rare. No one knows how well it performs here because no one has tried it yet.

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Mycology

I have no idea what fungi this is.

Mycology was a topic that we horticulture students did not study much in school. We learned about some of the more important fungal diseases of vegetation, but that was about all. We could not take the time to study it any more extensively than mycologists could take the time to study horticulture or even botany.

Yet, horticulturists are often expected to know more about mycology than we should be expected to know. Perhaps it is because fungal organisms seem to grow sort of like botanical organisms grow. In ancient history, mycology actually was more closely related to botany, but needed to become a separate discipline as more was learned about each of the two. Perhaps that was at a time when entomology still included arachnids, myriapods and crustaceans. Heck, there was a time when earth, air, water and fire were considered to be the only four primary elements.

I have no idea what this mushroom is. It got my attention because it is so weird. It is such a weird mix of pastel purple, gray and white, with such a distinctly flat top. It was solitary. Not only did I see no others like it, but I noticed no other terrestrial mushrooms of any sort nearby. It appeared amongst blackberry bramble and naturalized English ivy, on the bank of a creek, under bay trees, with bigleaf maples, white alders, red alders and a deceased Douglas fir nearby. The area was quite damp from all the rainy weather this winter. Large and likely old rusty ruddy brown basidiocarps extend from the rotting bases of some of the bay trees. Smaller and likely younger brown and white basidiocarps extend from the rotting trunk of the deceased Douglas fir. All of this is irrelevant, since I still have no idea what this is.

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Horridculture – WWW

Online, bay laurel often passes for culinary bay.

Anyone can say anything online. There is no shortage of inaccurate information. Much of it is stupidly inaccurate. Much of this stupidly inaccurate information is more popular and more efficiently dispersed than conflictingly accurate information. To make matters worse, some accurate information that seems like it should be readily available is notably lacking. For example, I can not determine if the native blue elderberry requires a pollinator for fruit production. It is a simple question that seemingly lacks an answer.

Facebook shared a link to an article about the twenty worst trees to select for home gardens. The article does not say where this information is relevant. Nor does it bother to mention that trees perform differently within different climates. It is presented as universally accurate information.

Chinese flame tree is first on the list. What is a Chinese flame tree? The article does not provide that information. This is what botanical taxonomy was invented for.

Eucalyptus is next on the list. What species of Eucalyptus? The article does not say. Nor does it mention any of the many species of Eucalyptus that are quite practical small trees. That is like saying that France, Spain, Italy, Greece and Portugal are all countries of Europe, but Africa is just Africa. (That happens also within other contexts.)

Tulip poplar is apparently dangerous because it drops branches. That sounds reasonable. However, coast live oak, blue gum eucalyptus, California sycamore and red willow are much more likely to do so here.

Black walnut is toxic. Although true, and some naturalized black walnuts remain from understock of the now extinct English walnut orchards, black walnuts are not commonly planted, and are not even available from nurseries.

Mulberry is messy. However, the only mulberry that is commonly planted is the fruitless mulberry. Fruiting cultivars are very rare, and mostly planted by those who actually want the fruit, and maintain them so that they do not get too big and messy.

Eastern cottonwood drops limbs. However, as the name suggests, it is Eastern, so is nowhere near here. Western cottonwood is a variety of the same species, and behaves similarly, but like black walnut, is neither planted intentionally nor is commonly available from nurseries.

The list goes on to include many trees that are not available here or that are simply not problematic. After describing all of the diverse species of Eucalyptus as one, it mentions a few species of similar cottonwoods as if they are more distinct from each other than they actually are. It shows a picture of common Mediterranean olive for Russian olive, which is not even remotely related. It says nothing about palms, which are good trees within appropriate situations, but require expensive maintenance by arborists who can climb them.

The internet is a useful tool, but is not perfect.

Posted on by tonytomeo · 8 Comments

Six on Saturday: Bad Botany

These six lack a common theme. I do find the botany of four of them to be annoying, but that is no theme. Leyland cypress has a new genus name, which I did not mention. I still do not believe that the native blue elderberry is the same species as the black elderberry of the East. I still do not know for certain if the double white angel’s trumpet is a hybrid, although I do believe that it is. Although I exceeded my preferred word count limit here, I tried to abbreviate some of the redundancy of nomenclature while including both Latin and common names with the same cultivar name. Otherwise, the first of these six would be Saccharum officinarum ‘Pele’s Smoke’, ‘Pele’s Smoke’ sugarcane, with ‘Pele’s Smoke’ mentioned twice, with a comma in between. I may continue this technique in the future.

1. Saccharum officinarum ‘Pele’s Smoke’ sugarcane continues to grow like a weed on the warm windowsill in the galley at work. It is not bronzing though. I suspect that this fresh new foliage will be too tender to survive outside even after early spring. It is no problem. It will simply make more. Many more cuttings are growing outside. They are slower but more resilient. For less redundancy, I used its same cultivar name after its species name and before its common name. Of course this explanation is longer than any redundancy.

2. Sambucus cerulea, blue elderberry is classified by most botanists as a Western variety of American black elderberry. I know better. I am Californian. Regardless, I am growing a few cuttings from a few different parents because no one seems to know if they should be more productive with pollinators, like European black elderberry is. Four tagged bits are from the same very productive specimen, which must be removed from a landscape. The other pair is from a random roadside specimen. Three other pairs were added later.

3. Agave americana, century plant is too prolific. We installed one of several ‘unwanted’ specimens and found all these pups within its can underneath. We can not use them all.

4. Ulmus parvifolia, Chinese elm became unavailable years ago after it was identified as a host for Dutch elm disease. Watersprouts continue to grow from a stump of a tree that was cut down years ago. If I could, I would grow several of this formerly familiar species.

5. X Cupressocyparis leylandii, Leyland cypress is irrelevant to this illustration of how a chainsaw cuts if one side is sharper than the other. Another saw cut the flatter surface to the left. Incidentally, the ‘X’ preceding the genus name indicates an intergeneric hybrid.

6. Brugmansia X candida ‘Double White’ angel’s trumpet should not bloom now. Either it does not know, or it does not care. Incidentally, the ‘X’ between the genus and species names indicates an interspecific hybrid. Like for the sugarcane, I used the same cultivar name after its species name, and before its common name. Is such abbreviation proper?

This is the link for Six on Saturday, for anyone else who would like to participate: https://thepropagatorblog.wordpress.com/2017/09/18/six-on-saturday-a-participant-guide/

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Nomenclature Is Designed For Simplicity.

Automotive and botanical nomenclature are remarkably similar.

As confusing as they seem to be, Latin names of plants are actually intended to simplify things. They work because they are universal, everywhere and in all languages. Common names may seem simpler, but are too variable in different regions and in different languages.

For example, the white pine that is native to Northern California is not the same as the white pine of Maine. However, only the white pine of California is Pinus monticola. Furthermore, it is known as Pinus monticola everywhere and in every language, even though it has different common names in French, Afrikaans and Vietnamese.

The first name of a Latin name, which should be capitalized, is the more general ‘genus’ name. (‘Genera’ is plural, and not coincidentally similar to the word ‘general’.) Pinus is the same genus name for all pines. Acer  is the same genus name for all maples. Quercus is the same genus name for all oaks; and so on.

The second name of a Latin name is the more specific ‘species’ name. (‘Specie’ is plural, and not coincidentally similar to the word ‘specific’.) Monticola specifies the genus of Pinus as Pinus monticola, the white pine of Northern California. Radiata specifies another genus of Pinus as Pinus radiata, the Monterey pine; and so on. The species name is not capitalized. Technically, Latin names, both genera and specie, should be italicized in print or underlined in cursive.

Latin names work like the names of cars. Buick, Chrysler and Mercury are all like genera. Electra, Imperial and Grand Marquis are all like specie, or the specific Buicks, Chryslers and Mercurys. ‘Limited’, ‘Custom’ and ‘Brougham’ are like variety names, like ‘Variegata’, ‘Compacta’, and ‘Schwedleri’. For plants, variety names are capitalized and enclosed in semi-quotes.

As universal as Latin names should be, a few sometimes get changed. This can be confusing, and causes some plants to become known more commonly by either the new or old name as well as the other of the two names as a ‘synonym’. For example, Dietes bicolor and Morea bicolor are the same plant; but not many know for certain which name is more correct. It is like when Datsun became Nissan, but was also known as Datsun for many years afterward.