|
|
|||||
| University of California, Berkeley | |||||
|
|||||
| Directory News Site Map Home | |||||
|
|||||
| Jepson eFlora: Taxon page
Key to families | Table of families and genera |
|
Indexes to all accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | |
|
Tree, generally monoecious, wind-pollinated; hairs many-branched.
Stem: bark peeling in scaly plates, leaving ± smooth areas of various colors, in age dark, thick, fissured; twig hairs dense.
Leaf: simple, alternate, deciduous; lobes, veins generally 3,5(7), palmate; stipules generally leaf-like, free or fused around stem, shed by leaf maturity or not; petiole at base dilated, hollow, ± covering bud; blade hairs dense, ± 0 in age.
Inflorescence: heads 1–7, ± evenly spaced on axis, spheric, many-flowered, sessile or on pendent peduncles, generally unisexual; staminate breaking apart in age; pistillate persistent; bracts subtending heads, flowers.
Flower: unisexual; calyx cup-shaped, sepals (0)3–6(8), free or united basally.
Staminate flower: petals 3–6, minute or vestigial, fleshy or scale-like; stamens 3–6(8), alternate petals, anthers subsessile, axis above anther expanded, disk-like, ± peltate; carpels vestigial or 0.
Pistillate flower: petals 3–6, minute, or generally 0; staminodes often 3–4; carpels (3)5–9, free, ovary of each superior, 1-chambered, generally 1-ovuled, with 1 ± linear style.
Fruit: achenes in spheric head, small, each with hairs from base, shorter hairs up the side; style persistent, beak-like, or deciduous.
1 genus, ± 8 species: n temperate; some cultivated for ornamental, shade; wood generally of limited commercial value. [Feng et al. 2005 Syst Bot 30:786–799] —Scientific Editor: Thomas J. Rosatti.
Unabridged genera in family: 1 genus, ± 8 species: n temp; some cult for ornamental, shade; wood generally of limited commercial value, although long ago used for buttons, the trees then called buttonwood.
Unabridged note: Lvs and twigs with many-branched hairs, each comprising a single multicellular central axis with unicellular lateral, generally whorled rays.
Previous taxon: Veronica wormskjoldii
Next taxon: Platanus
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
Copyright © 2012 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.