Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



David J. Keil, Family Editor and author, except as specified

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, biennial, perennial herb
Stems erect, simple to much-branched
Leaves simple, basal or alternate, sessile or petioled, entire or divided 1 or more times into linear lobes, dotted with sunken resin glands
Inflorescence: heads generally radiate, solitary or in few–many-headed cymes; involucre hemispheric; phyllaries in 2–3 similar or dissimilar series; receptacle flat to rounded, naked
Ray flowers few–many; corolla yellow, fan-shaped, 3–5-lobed
Disk flowers many; corolla yellow
Fruit obpyramidal, generally 5-angled, hairy; pappus of ± 5 membranous, often awn-tipped scales
Species in genus: 28 species: w North America, South America
Etymology: (Greek: sharp membrane, from pappus)
Horticultural information: TRY.


H. lemmonii (Greene) Cockerell

Biennial or perennial herb 4–50 cm, persistently tomentose or glabrous in age
Stems often > 1, generally branched above middle
Leaves basal and cauline, 2–9 cm, divided into 1–5 mm wide linear lobes
Inflorescence: heads in ± flat-topped cyme; peduncles generally < 8 cm; involucre generally 15 mm diam or more; outer phyllaries fused at base, 5–7 mm, < or = inner series
Ray flowers 8–14; ligules 10–15 mm
Disk flowers: corolla 3.5–4.5 mm
Fruit ± 3 mm; pappus scales, 1–2 mm, lanceolate to ovate, entire
Chromosomes: 2n=30
Ecology: Meadows or dry, rocky slopes
Elevation: 700–3500 m.
Bioregional distribution: e Klamath Ranges, Great Basin Floristic Province
Distribution outside California: se Oregon, s Idaho, Nevada, Utah
Flowering time: Jun–Aug
The dwarf, subalpine form has been called H. cooperi (A. Gray) Cockerell var. canescens (D.C. Eaton) K.L. Parker.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for HYMENOXYS%20lemmonii being generated
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).

Retrieve Jepson Interchange Index to Plant Names entry for Hymenoxys lemmonii
Retrieve dichotomous key for Hymenoxys
Retrieve multiple-entry key (MEKA) for Hymenoxys
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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