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
Etymology: (Anagram formed from name of collector of type material, E. Palmer, 18311911)
Reference: [King & Robinson 1987 Monogr Syst Bot Missouri Bot Garden 22:235237]
Annual < 40 cm, glabrous to puberulentSee the CNPS Inventory for information about endangerment and rarity.
Leaves opposite below, alternate above, generally sessile, < 5 cm, linear, generally entire
Inflorescence open; heads discoid, many, 814 mm, 56 mm wide; involucre cylindric to narrowly bell-shaped; phyllaries 2025, unequal, in several series, lanceolate; receptacle flat, naked
Flowers ± 30; corollas 56 mm, cylindric, ± white, pink-tinged; anther bases rounded, tips oblong; style branches long, club-shaped, rounded
Fruit 3 mm, slender, 5-ribbed; pappus of 3 bristles 5 mm and 3 scales 0.5 mm
Ecology: Sandy creosote-bush scrub
Elevation: < 500 m.
Bioregional distribution: Sonoran Desert
Distribution outside California: n Mexico
Flowering time: Apr, Dec
|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).|