Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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ASTERACEAE

SUNFLOWER FAMILY

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.

HELIANTHELLA

Perennial from taproot and caudex
Stems 1–several, erect
Leaves basal and cauline, alternate or opposite; petioles short to long; blades generally 3-veined, linear to ± ovate, entire, ± scabrous
Inflorescence: heads radiate, 1–few, in cymes; peduncles long, with 0–few leaf-like bracts; involucre hemispheric; phyllaries in 2–3 series, free; receptacle flat to ± convex, chaff scales folded around ovary, entire, obtuse, tip hairy
Ray flowers sterile; corolla yellow; style 0
Disk flowers many; corolla and anthers yellow or purple; style tips short-triangular
Fruit thick or compressed; pappus 0 or 2 awns 1–2 mm (sometimes also crown of low scales)
Species in genus: 8 species: w North America
Etymology: (Latin: diminutive of Helianthus )
Reference: [Weber 1952 Amer Midl Naturalist 48:1–35]

Native

H. californica A. Gray


Stems 1–6 dm, glabrous to coarsely hairy
Leaves: blades 0.5–4 cm wide, linear to oblanceolate
Inflorescence: peduncles 10–30 cm, sometimes ± scapose, ± short-hairy; involucre generally 1–2 cm diam; phyllaries seldom leaf-like, generally 1–2 cm, short-ciliate
Ray flowers 9–21; ligules generally 1–2 cm
Disk flowers: corollas 4–5 mm, yellow; anthers yellow to purple
Fruit 6–8 mm, obovate, thin, glabrous; pappus 0 or 2 awns or narrow scales, sometimes with crown of short scales
Ecology: Grassy sites, woodland, forest
Elevation: < 2600 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, Cascade Range, Sierra Nevada, s Peninsular Ranges
Distribution outside California: s Oregon

Native

var. nevadensis (Greene) Jeps.


Stems generally 3–6 dm
Leaves generally 1.5–4 cm wide
Inflorescence: heads 1–few; disk generally 1.5–2 cm diam
Fruit: pappus of 2 awns or narrow scales 1–2 mm and crown of short scales
Ecology: Habitats of sp.
Elevation: 250–2600 m.
Bioregional distribution: Inner North Coast Ranges, Cascade Range, Sierra Nevada, s Peninsular Ranges
Distribution outside California: s Oregon
Horticultural information: TRY.

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bioregional map for HELIANTHELLA%20californica%20var.%20nevadensis 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 Helianthella californica var. nevadensis
Retrieve dichotomous key for Helianthella
Retrieve multiple-entry key (MEKA) for Helianthella
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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