Supposedly, ‘Citriodora’ Monterey cypress, Cupressus macrocarpa ‘Citriodora’, can get more than thirty feet tall and nearly as wide. Yet, it grows slowly enough to function like small trees or large shrubs. Even if it eventually gets a bit too large, it is much more conducive to occasional pruning than typical Monterey cypress is, and can even be artfully pruned into informal hedges. (However, nonselective shearing deprives if of its naturally appealing form.)
With its lemon yellow foliage, ‘Citriodora’ Monterey cypress resembles golden arborvitae, but is even brighter yellow and has distinctive cypress-like branch structure. Its older foliage within eventually turns darker green to add depth and enhance the structure. ‘Citriodora’ Monterey cypress looks best locally if at least partially shaded by larger trees during the afternoon.
Tony Tomeo 
I’m skilled enough with scientific names now to have spotted ‘Citriodora’ and thought, “Citrus”? This is a pretty thing, for sure. On the other hand, if I’d spotted it in the wild without knowing about the cultivar, I might have thought the tree unhealthy.
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It does not exist in the wild. It is a cultivar from mutant growth. This is a recycled article from a few years ago. Since I wrote it, I found that there are more cultivars with gold foliage than I was aware of. One might have become available only recently. The primary cultivar, which I have not seen since the late 1980s, was only gold on new foliage, and became less gold as it matured. Old specimens that I remember from about 1987 are now completely dark green, with no gold. If their new growth is gold, I do not see it. Another cultivar that we have outside here is as yellow as the ‘lemon’ cypress, but has the slightly coarser foliage of wild trees, which I prefer. ‘Citodora’ means that it smells like citrus, which, strangely, it does!
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Of course! Now I remember citronella candles, which are said to keep mosquitoes away (I’m doubtful).
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That Citronella is either a geranium or an herbal grass. I suspect that it is the grass.
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