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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.

BLEPHARIZONIA

BIG TARWEED


Species in genus: 1 sp
Etymology: (Greek: eyelash girdle, from fruits weakly held by phyllaries)

Native

B. plumosa (Kellogg) Greene

Annual 3–18 dm, strongly scented
Stem generally 1, erect, much-branched, soft-hairy to bristly, puberulent, ± glandular
Leaves basal and lower cauline 4–15 cm, crowded; blades linear, entire or serrate, often withering in flower; cauline alternate, generally subtending smaller leaf clusters, base 1–3 cm wide; clustered leaves < cauline, margins with tack-shaped glands
Inflorescence ± glandular; heads radiate, axillary or terminal, in a narrow to open panicle; bracts generally glandular-ciliate; involucre 5–7.5 mm, hemispheric; phyllaries 1 per ray flower, elliptic, hairy and often glandular, base closely appressed to ovary, tip free, acute; chaff scales between ray and disk flowers, = phyllaries, flat
Ray flowers 5–13; corolla 6–9 mm; ligule 5–8 mm, white, red-veined
Disk flowers 10–35; corolla 4–5.5 mm, white, throat > tube, lobes 0.5 mm; anthers brown; style branches tapered, short-bristly
Fruit 3.5–4 mm, club-shaped, 10-ribbed, densely puberulent, ± dark; ray pappus 0 or minute crown, sometimes of narrow, plumose scales < 1 mm; disk pappus 1.5–3 mm, scales 15–20, narrow, plumose, sometimes 0 or reduced to crown
Chromosomes: 2n=28
Ecology: Dry grassy areas
Elevation: < 1100 m.
Bioregional distribution: w San Joaquin Valley, e San Francisco Bay Area, South Coast Ranges.

Native

subsp. plumosa

Plant gray-green, sparsely glandular below heads
Inflorescence: branches of older plants spike-like or raceme-like; many heads lateral on inflorescence branches; involucre canescent
Fruit: disk pappus 1.5–3 mm
Ecology: Dry hills, plains
Elevation: < 400 m.
Bioregional distribution: nw San Joaquin Valley (n of Alameda Co.), e San Francisco Bay Area.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for BLEPHARIZONIA%20plumosa%20subsp.%20plumosa 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 Blepharizonia plumosa subsp. plumosa
Retrieve dichotomous key for Blepharizonia
Retrieve multiple-entry key (MEKA) for Blepharizonia
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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