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.
Species in genus: 1 sp. (perhaps another undescribed)
Etymology: (Greek: fishhook chaff)
Often placed in Stylocline , but more closely related to Hesperevax or Eur Cymbolaena.
| Native |
Annual, ± gray, cobwebby to tomentose
Stems 1–several from base, spreading to erect, < 15 cm, ± forked
Leaves simple, alternate, ± sessile, < 30 mm, linear-oblanceolate to ± elliptic, entire
Inflorescence: heads disciform, ± sessile in leafy-bracted groups of 2–5, < 9 mm; phyllaries 0 or 3–6, vestigial, ± equal, membranous; receptacle 1–2 X longer than wide, expanded at tip, chaffy; outer chaff scales phyllary-like, each enclosing a pistillate flower, falling with a fruit, woolly, strongly 3-veined, body hard, tip scarious-winged; innermost chaff scales each subtending a disk flower, 2.7–4.1 mm (> outer), open, concave, persistent, thinly woolly, in fruit rigid, enlarged, spreading, tip hooked strongly inward, forming a spine
Pistillate flowers 5–10 in 1–2 series; corollas tubular
Disk flowers staminate, 3–5, 1–1.5 mm, 4–6-lobed
Fruit 1.4–2 mm, 0.6–0.9 mm wide, obovoid, compressed front-to-back, smooth, dull, black-banded near base; pappus 0
Ecology: Bare or grassy, often serpentine slopes, road beds, vernally moist places
Elevation: < 1900 m.
Bioregional distribution: California Floristic Province (except coast), Modoc Plateau, sw Mojave Desert
Distribution outside California: to Oregon, Idaho, Nevada, nw Baja California
Flowering time: Apr–May
Synonyms: Stylocline f. (A. Gray) A. Gray including var. depressa Jeps
| 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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