Jepson Interchange (more information)
For up-to-date information about California vascular plants, visit the Jepson eFlora.
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL (1993) |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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.
Perennial, glabrous to densely hairy
Stems erect
Leaves simple, basal and cauline, alternate; lower wing-petioled; upper sessile; blade 3-veined
Inflorescence: heads large, radiate, 2–15 in ± flat-topped cymes; peduncles short to long; involucre disk-like or widely bell-shaped; phyllaries in 2 series; receptacle ovoid to spheric, naked
Ray flowers 14–35; ligules yellow to orange, elongated, 3–4-lobed
Disk flowers many; corollas yellow; tips of style branches truncate, shrub-like
Fruit oblong, 4-angled; hairs straight; pappus of 5–7 lanceolate scales
Species in genus: 3 species: w US to C.Am
Recent taxonomic note: *For revised taxonomy see Bierner 1994 Sida 16:1–8.
Etymology: (Dugald Stewart, Scotland, 1753–1828)
Reference: [Bierner 1974 Brittonia 26:385–392]
| Native |
Stems 3–9 dm, glabrous to ± hairy
Leaves entire, obtuse to acute; lower cauline and basal oblong to oblanceolate; middle oblong to elliptic; upper linear to lanceolate
Inflorescence: peduncles 3–16 cm, white-tomentose below heads; disk 12–17 mm, 19–26 mm diam; phyllaries in 2 series, outer lanceolate to ovate, ± fused, ± hairy, inner smaller, elliptic, acuminate, free, glabrous
Ray flowers 14–26; ligules 1.5–3.5 cm, yellow to orange
Disk flowers: corollas 4–5.5 mm
Fruit 3.5–4.5 mm; pappus 3–4 mm
Chromosomes: 2n=30
Ecology: Meadows
Elevation: 1500–3000 m.
Bioregional distribution: Klamath Ranges, Sierra Nevada, Warner Mountains, n East of Sierra Nevada
Distribution outside California: to Oregon, Wyoming, New Mexico
Flowering time: Jul–Sep
Synonyms: Helenium h. A. Gray
Recent taxonomic note: *Hymenoxys hoopesii (A. Gray) BiernerHorticultural information: IRR or WET, SUN: 1, 2, 3, 6, 7, 15, 16, 18.
| 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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