Tag: trees

comparison study

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pawpaw

The tropical/subtropical fruit that Australians call pawpaw (Carica papaya) is known as papaya in the US. Americans have their own pawpaw (or papaw)—Asimina triloba—a completely different species, native to the eastern United States and southern Ontario, Canada.

Interestingly, though we’re Australian, the traditional folk song my mother taught me as a child—“Pick ‘em up pawpaws, put ‘em in your pocket, way down yonder in the pawpaw patch”—is of American origin. The ‘patch’ refers to Asimina triloba‘s characteristic patch-forming clonal growth habit. And presumably the fruit that one picks up has fallen to the ground, and one’s apron pocket is roomy.

I’d like to try American pawpaw. I think custard apples are delicious, so I’m sure I’d like them.

Eucalyptus

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Eucalyptus viminalis

There are about 800 species in the Eucalyptus genus; correct identification can be tricky, as features may vary with genetics, environment and tree age. I’m making an educated guess* that the ones at Peter Strauss Ranch in Agoura Hills are manna/ribbon/white gums, native to south-eastern Australia.

One thing I find intriguing is the huge variation in gumnut (fruit) size from species to species, from 3mm to 60 or more mm wide. There’s no correspondence with the tree’s height; I wonder what factors determine this feature. These ones are definitely at the small end of the spectrum.

*Ref: Taller Eucalypts for Planting in Australia by Dean Nicolle

Melaleuca nesophila

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Melaleuca nesophila

I spotted a new-to-me Australian native in the grounds of my local university. Showy Honey-Myrtle is endemic to an area near Albany in Western Australia. The Noongar indigenous name is mindiyet.

Melaleuca nesophila is cultivated as an ornamental plant. It grows in full sun to part shade, in sandy or clay loam soils. Once established, it will tolerate extended dry periods as well as coastal conditions. This species is naturalised in some parts of Victoria where it is considered a serious environmental weed, as it replaces the local native plants.

Psidium guajava

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Psidium guajava

I’ve never grown common guavas—this tree is in my MIL’s yard—so I don’t know if this growth pattern is normal. I don’t see it on any of the images that a quick search pulls up. Part of the flower (a sepal?) persists as the fruit grows, forming a tough ”hood”. Looking at variously-sized fruits on the tree, it seems that this hood stays the same size as the fruit enlarges. Presumably it eventually falls off. What is the purpose of this phenomenon? Is it unique to this tree?

sierras

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Sierra trees

I’m preparing for a trip to the Western Sierra Nevada Mountains; this book is coming with me. Quote by John Muir from the intro: “The coniferous forests of the Sierra are the grandest and most beautiful in the world, and grow in a delightful climate on the most interesting and accessible of mountain-ranges, yet strange to say they are not well known.” At minimum, I hope to learn to identify a handful of new-to-me trees while I’m there.

trunk

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trunk

Last of the toned paper in my sketchbook. I did quite enjoy it, but I don’t think I ever used it to its full advantage (leaving the paper as the mid tone then applying lighter and darker colours over it)—except maybe for the green man fountain sketch. I’d try another toned sketchbook, but for now I’m going back to white paper.