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|
|TREATMENT FROM THE JEPSON MANUAL||
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Jepson Interchange (more information)
©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, 1many, generally arrayed in cymes, generally subtended by ± calyx-like involucre; flowers 1many 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)45; stamens 45, 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):128. See glossary p. 25 for illustrations of general family characteristics.
Species in genus: 1 sp.: CA
Etymology: (Joseph P. Tracy, nw California botanist, 18791953)
Reference: [Blake 1937 Madroño 4:7377]
Annual < 35 cmSee the CNPS Inventory for information about endangerment and rarity.
Stem generally branched above, erect, glabrous
Leaves alternate, entire, < 2.5 cm, narrowly lanceolate; margins hairy
Inflorescence: heads radiate, terminal; involucre, < 7 mm, cylindric to widely obovoid; phyllaries in 24 series, ± linear, falling separately
Ray flowers < 22 in 1 series; corolla < 5.5 mm, thread-like, inconspicuous, pale or greenish yellow, red-tinged
Disk flowers < 26, < ray flowers, pale or greenish yellow
Fruit < 5.5 mm, cylindric or fusiform, brown; beak short, hairy; pappus of < 40 slender bristles, < 4 mm, many > disk flowers
Ecology: Grassy slopes
Elevation: < 500 m.
Bioregional distribution: North Coast Ranges (Humboldt, Lake cos.).Generally self-pollinated.
|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).|