Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
Annual to tree
Leaves basal or cauline, alternate to whorled, simple to compound
Inflorescence: 1° inflorescence a head, each resembling a flower, 1–many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1–many per head
Flowers bisexual, unisexual, or sterile, ± small, of several types; calyx 0 or modified into pappus of bristles, scales, or awns, which is generally persistent in fruit; corolla radial or bilateral (rarely 0), lobes generally (0)4–5; stamens 4–5, anthers generally fused into cylinder around style, often appendaged at tips, bases, or both, filaments generally free, generally attached to corolla near throat; pistil 1, ovary inferior, 1-chambered, 1-seeded, style 1, branches 2, generally hair-tufted at tip, stigmas 2, generally on inside of style branches
Fruit: achene, cylindric to ovoid, generally deciduous with pappus attached
Genera in family: ± 1300 genera, 21,000 species (largest family of dicots): worldwide. Largest family in CA. Also see tribal key to CA genera: Strother 1997 Madroño 44(1):1–28. See glossary p. 25 for illustrations of general family characteristics.
Biennial or perennial herb from strong taproot; herbage ± glabrous; sap milky
Stems: branches few, strongly ascending
Leaves basal and cauline, alternate, entire, grass-like, parallel-veined
Inflorescence: heads ligulate, solitary at branch tips; peduncles long, naked; involucre cylindric or narrowly conic; phyllaries in 1 series; receptacle naked
Flowers yellow to bronze or purple; ligules readily withering
Fruit 2.5–3 cm; beak stout, > body; pappus of stout plumose bristles, 2° bristles tangled, tips of a few bristles > the rest, unbranched; fruits spreading, forming a spheric head 4–5 cm diam
Species in genus: ± 45 species: Eurasia
Etymology: (Greek: goat's beard)
| Introduced |
Annual, biennial 3–10 dm
Leaves 2–5 dm
Inflorescence: peduncle much wider toward tip; phyllaries 8–13, 2.5–4 cm in flower heads, >> flowers, 4–7 cm in fruit heads
Flowers: ligules pale lemon-yellow
Fruit 25–35 mm; pappus ± white
Chromosomes: 2n=12
Ecology: Uncommon. Weed in waste places
Elevation: 0–2700 m.
Bioregional distribution: n Sierra Nevada, San Joaquin Valley, San Francisco Bay Area, Outer South Coast Ranges, San Bernardino Mountains, Great Basin Floristic Province
Distribution outside California: native to Europe
Flowering time: May–Jul
| YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps). |
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