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Feral Flowers Are Not Wildflowers

Most nasturtium varieties will eventually revert.

Feral flowers are technically not the same as wildflowers. As their designation suggests, wildflowers grow wild. They always have, without intervention. They are naturally native. Their native ranges can fluctuate, but do so naturally as associated ecosystems change. Their status as wildflowers does not change within home gardens or refined landscapes.

Feral flowers are progeny of cultivated flowers. Almost all are exotic, or nonnative. Some are true to type, which means that they are indistinguishable from the originals. However, because of extensive breeding, many revert to a more genetically stable state. Some can naturalize, or perpetuate without intervention. Then, they seem to behave as wildflowers.

For example, most home garden nasturtiums begin as garden varieties. They bloom with particular colors because of their breeding and selection. Their progeny, however, bloom with more natural floral color. After a few generations, they may bloom only basic orange and yellow. Such feral flowers can naturalize within riparian ecosystems like wildflowers.

Because they are not native, naturalized nasturtium are technically not wildflowers. They are merely naturalized feral flowers. Although they are rarely aggressively invasive, they can interfere with natural ecology. They might compete with native species for resources and space. They can sustain organisms that are pathogens to native vegetation species.

California poppy is a genuinely native wildflower. However, a few home garden varieties developed from selection and breeding. Initially, such varieties bloom with unusual floral colors like white, lavender, pink or red. After a few generations, though, their colors revert to their more natural orange. Although wildflowers, they are also technically feral flowers.

Many of the most noxious weeds here escaped from home gardens and naturalized. For example, common pink pampas grass became popular during the Victorian Period. Now, it is quite naturalized and compromising ecosystems throughout the West Coast. Its feral flowers are appealing, but perpetuate infestation. They are surely not native wildflowers. Water hyacinth and yellow flag are other examples.

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Mars & Venus

It is much too early to distinguish gender of these carob seedlings.

Phoenix dactylifera, common date palm supposedly became more popular than Phoenix canariensis, Canary Island date palm during the 1990s for two primary reasons. Firstly, it is less susceptible to pink rot that was killing so many Canary Island date palms at that time, and continues to do so. Secondly, mature specimens became so readily available as their orchards were being displaced by urban development, particularly around Las Vegas and Palm Springs. Of course, fruiting date palms would have been too messy for the urban landscapes that they were recycled into. So, to prevent such mess, only female trees were recycled for such landscapes. Without their male pollinators, they are fruitless. Female trees are generally shorter, more lushly foliated, and therefore more appropriate to refined landscapes anyway. Besides, all but between one and five percent of trees in date orchards are female. Male trees were not completely wasted though. Although not as lush, they are taller and statelier, so were recycled to landscape remote desert highway interchanges, where their pollen does not reach female date palms that now inhabit more urban landscapes. It all works out well, although contrary to the original purpose of the date palms involved. It would seem silly to separate genders of most familiar dioecious species, such as kiwifruits and hollies. However, only female carob trees are available from nurseries nowadays because they would be messy with pollination, and also because male floral fragrance is horrid! Male carob trees are only available for agricultural purposes, or grow as feral males from seed. The problem that I will eventually encounter with my carob trees is that I grew them from seed, and will not know what their genders are until they are a few years old. I want a female specimen in a specific location, and a male pollinator in another specific location. I think that I will put three seedlings in each location, select one that matures to be the preferred gender for its particular location, and eliminate the other two. Alternatively, I could allow two genders to grow together in such a manner than the male grafts to the female to become a branch that I could prune to be a small but necessary portion of the collective canopy. Of course, there is a possibility that all within each group of three could be the wrong gender. I will not know until a few years from now.

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Nasturtium

Feral nasturtium is yellow or orange.

Most consider nasturtium, Tropaeolum majus, to be a warm season annual. Some might consider it to be a cool season annual. A few press its tender stems into moist soil to root and continue growth as a perennial. Plants that bloom for summer can disperse seed for winter bloom. Plants that bloom for winter can likewise disperse seed for summer bloom.

Because they replace themselves so readily, they may seem to be perennial. In actuality, plants from one season, whether warm or cool, may not last long in the next. Seed might be sneaky about spreading. Trailing nasturtiums might naturalize in riparian ecosystems. Nasturtium seedlings are available in cell packs, but do not grow as vigorously as seed.

Nasturtium bloom is diverse shades and tints of yellow, orange and red. Varieties bloom with particular colors within that range, although few are true to type. Their feral progeny bloom only bright orange and bright yellow. Their tender growth does not get much more than one or two feet deep. Trailing varieties can climb as high as first floor eaves though. Nasturtium leaves are almost circular like those of water lilies.

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Feral Vegetation Inherits Natural Advantages

Feral alyssum is limited to white.

Most vegetation within home gardens is better than it was naturally in the wild. For many, systematic selection isolated the best from average populations. Selective breeding and hybridization improved many others. Some are too genetically compromised by breeding to produce viable seed. Feral progeny of those that are not demonstrate the divergences.

Such feral progeny are generally not true to type. They are, to varying degrees, more like their ancestors than their direct parents. Some can revert directly to a natural state in the first generation. Some do so slower through a few generations. Feral progeny of hybrids are still hybrids but may be more primitive. Many hybrids produce no viable seed though.

‘Jewel Mix’ nasturtium, for example, blooms with many shades of yellow, orange and red. Several are pastels. Some are dark enough to be almost brown. A few are bicolors. Their progeny though, blooms with less light, dark and red colors. Bloom becomes exclusively bright yellow and orange as feral plants replace originals. It reverts to more natural color.

That is because nature is efficient. By human standards, innately unnatural breeding and selection improve plant life. They produce better fruits, vegetables, flowers and anything that grows on plants. However, they interfere with natural function such as reproduction. Seedless limes, which are preferable within home gardens, would go extinct in the wild.

Plants that revert to more natural feral states are merely trying to survive. Sterile pampas grass is only sterile because it is exclusively female. Naturalized Andean pampas grass can pollinate it from a distance, though. Their hybrid but nonsterile feral progeny may be as invasive as their Andean parent. They are detrimental to their ecosystem, but survive.

Not all feral flora grows from seed. Seedless and thornless honeylocust are grafted onto wild honeylocust understock. Seedy and thorny suckers can grow from such understock below its grafts. They commonly develop after removal of original grafted trees. By some standards, they become aggressively invasive. By other standards, they are sustainable.

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Is Phlox A Weed?

Phlox seems to be right at home here now.

When it first appeared within one of the landscapes at work four years or so ago, I was not sure of its identity. I guessed that it was some sort of phlox only because it resembled phlox that I had seen in mail order catalogs many years earlier. No one knows where it came from or how it got there. Some sort of Campanula arrived within the same garden only a year or so earlier, and worked out nicely. Therefore, we decided to give what we thought was phlox the same chance to perform.

It performed splendidly! It matured rather quickly, and happened to fill a prominently bare spot. Its bloom is pure white and delightfully fragrant. After getting cut back for winter, it regenerated for spring.

Then, we started noticing that it had seeded while no one noticed. A few seedlings were appearing nearby. At first, we were pleased, but also concerned that it could become invasive. I pulled a few seedlings up from where I did not want them to grow, and was able to relocate them to better situations, but was not sure if I should have done so.

Fortunately, like the campanula, this new plox seemed to want to cooperate. After getting established, it did not seem to be invasive.

Now, it is one of my two favorite perennials within its particular landscape, along with Gladiolus papilio. I am confident that we can allow it to bloom fully without dispersing too many seed afterward. I am very fond of the strikingly bright white bloom and its rich fragrance. It would be great if more feral species developed as assets to their gardens instead of as weeds. I am pleased that we gave this phlox its chance to perform, and will likely relocate more to other landscapes.

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Cats Gone Wild!

The best cats are domestic.

Rats, mice, squirrels, racoons, opossums, skunks, deer, pigeons and more; it just never ends! There are so many other life forms who often enjoy our gardens more than we do. While visiting my colleague in Los Angeles, his garden became overrun by a swarm of bees! Fortunately, they did no damage and left the same day.

The worst problem in his garden is cats. His neighbor hoards ‘unaltered’ feral cats that have proliferated into a substantial herd. Instead of exterminating rodents from the neighborhood, the overfed cats ignore the droves of rats that are drawn to the cat food left out on the porches. The rats attract opossums. Fleas are everywhere!

All this wildlife brings all sorts of other problems. The well kept domestic cats that live inside the home of my colleague are frequently afflicted with illness transmitted by the sickly feral cats. Flat roofs and basement crawl spaces of several adjacent homes have become litterboxes. The overpowering aroma is horrendous.

Fortunately, such proliferation of cats is rare. Most of us do not mind when a neighborhood cat, or even a few cats, visit the garden. However, when cats become a problem, they are nearly as difficult to remedy as vermin.

Although most municipalities have limited the number of domestic cats that can reside at individual residences, feral cats come and go freely, so are considered to be wild animals who are exempt from such limits. Besides, no one wants to enforce such ordinances with their neighbors, even if the problematic cats happen to be domestic house cats. All we can do is try to limit the problems in our own gardens and homes.

Flat roofs sometimes get used as litterboxes because they commonly have gravel on them and tend to accumulate a bit of other debris. If this is a problem, and if possible, access to flat roofs should be obstructed. Tree limbs and vines should be pruned back.

Basements and crawl spaces are easier to obstruct access to by simply repairing vent screens and exterior basement access. Cats like to use crawlspaces as litterboxes because the soil is always dry and dusty. Around the garden, dry spots are less attractive to cats if sometimes watered, even if there are no plants present. Adding spreading plants is even  better. In a small dusty area behind the garage, I spread out a bit of firewood over the soil. By the time the firewood gets used, it will be raining and too muddy for cats.

Posted on by tonytomeo · 19 Comments

Horridculture – The Wrong Plant In The Wrong Place

P80627This is the opposite of the ‘right plant in the right place’. It is something that horticultural professionals should neither promote nor tolerate when feral plants appear in landscapes that they are getting payed to maintain. This example looks like it is more relevant to the topic of ‘Fat Hedges’ from https://tonytomeo.wordpress.com/2018/06/06/horridculture-fat-hedges/ , but there is more to this feral pyracantha than that. Yes, it is shorn too frequently to bloom or produce colorful berries. Yes, it looks like an upside-down and halfway buried Christmas tree. Yes, it contributes nothing to the landscape. What is worst of all is that it does not even belong there. It was certainly not planted there on the edge of the curb. There are others nearby, but they happened to appear in spots where they could have actually been assets to the landscape if they had not also been shorn into this weird upside-down and halfway buried Christmas tree shape.

Pulling or at least cutting weeds is generally one of the responsibilities of maintenance ‘gardeners’. It might be acceptable or even preferred to leave a few feral plants if they happen to appear where they might be useful. Those that appear where they would be a problem must be removed. It really would not have been much work to pull this particular pyracantha if it had been done when it first appeared. Even if it had not been pulled right away, and gotten cut down by a weed whacker long enough to develop strongly attached roots, it could have been dug out while young with only a bit of effort.

Okay, so that is in the past now, just like all the other days, weeks, months and years that this feral pyracantha was not removed. Okay, so if for some reason known only the maintenance ‘gardener’ who likely charges significant fees for the maintenance of this landscape, this specimen is to be salvaged, should it not have been pruned back away from the curb? Of course! Although it is right on the curb, much of the growth could have been directed back away from the curb and over the bare embankment. That area is not used for anything anyway. The emptiness of the embankment is certainly no asset to the landscape. Empty pavement is an asset here.

A chain is only as strong as the weakest link. A driveway is only as wide as the narrowest part. All this asphalt pavement and concrete curb is expensive. It was probably worth it to get a nice wide driveway. However, the usable area is not as wide now as it was originally. The feral pyracantha that looks like an upside-down and halfway buried Christmas tree extends nearly four feet into it. That means that the usable space of the expensive driveway is nearly four feet narrower in that spot than it should be. Just think of all the expense that could have been saved if the driveway had been constructed four feet narrower than it had been!

Posted on by tonytomeo · 12 Comments

Dingo

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Dogs and humans have been in a symbiotic relationship longer than history can document. Dogs naturally became more domesticated as humans did, and have been more or less selectively bred for a few thousand years.

Dingos are different. No one knows for certain how domesticated they were when they first came to Australia. They probably had been domesticated enough to come on boats with the first humans to migrate to Australia. After arriving in Australia, they became feral, although still symbiotically migrating with humans. They are now considered a native species of Australia.

Many species of plants have lived symbiotically with humans as well. As long as humans have been living with dogs, they have been domesticating and breeding plants. As plants were more extensively bred, they became more dependent on humans for their perpetuation. Some are so overly bred that they are sterile and unable to perpetuate without human intervention to propagate them vegetatively. Others, although unnaturally productive in regard to what humans want from them, are too weak or otherwise inferior to survive in the wild.

However, there are some extensively bred plants that escape their domestic lifestyles, and perpetuate feral descendants who retain some of the domestic characteristics of their extensively bred ancestors. They are not quite like naturalized plants that were merely imported in a more or less natural state from other regions, or those that naturalize and revert to a natural state. Characteristically, they are between wild plants and extensively bred and selected domestic plants. They have developed their own stable but feral lineage that can perpetuate in the wild.

For example, the purple leaf plum has been developed as an ornamental tree for a very long time. Several vegetatively propagated cultivars are now available. The ancestors were likely discovered as mutants with darker bronzed foliage. These primitive mutants were more or less genetically stable, and were likely able to perpetuate naturally. It is difficult to say for certain. From these ancestors, seedlings with even darker foliage were selected, and bred to find more seedlings with even darker foliage, and so on. Because of this selective breeding, purple leaf plum trees grown as domesticated ornamental trees now have darker foliage they would naturally in the wild. They are propagated vegetatively because some are so overly bred that they are sterile, and seedlings from those that can produce viable seed would be likely be more genetically stable, and therefore less genetically ‘developed’. This is why feral seedlings from purple leaf plums that can produce viable seed are not as dark purplish bronze as their parents. Seedlings from the seedling trees are even lighter bronze. They may never be completely green, but they will not be dark purplish bronze either. They are feral purple leaf plums, like dingoes.