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.
Annual or perennial herb < 30 cm, ascending, hairy
Leaves sessile; lower opposite; blades < 2.5 cm, oblong, serrate
Inflorescence open; heads discoid, small, 1–few; involucre hemispheric to bell-shaped; phyllaries ± 30, subequal in 2–3 series; receptacle convex to conic, naked
Flowers 75–125; corolla tube narrow; style branches slender
Fruit 4–5-ribbed; pappus of 2–6 short bristles, ± 1 mm
Species in genus: 2 species: sw US, Mex
Etymology: (Greek: hair crown, from pappus)
Reference: [King & Robinson 1987 Monogr Syst Bot Missouri Bot Garden 22:188–190]
| Introduced |
Inflorescence few-branched; heads ± 5 mm diam
Flowers: corolla ± 1 mm, throat white below, maroon above, lobes white
Fruit ± 1.5 mm
Chromosomes: 2n=30
Ecology: Uncommon. Moist places
Elevation:
Bioregional distribution: Great Central Valley, South Coast
Distribution outside California: native to s Texas, ne Mexico
Another var. in Baja CA.
See the CNPS Inventory for information about endangerment and rarity.| 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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