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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

BLEPHARIZONIA BIG TARWEED

Bruce G. Baldwin


Annual 1–18+ dm, strongly aromatic. Stem: erect, branches arched-ascending or ± wand-like, long- and short-bristly, ± glandular, at least distally. Leaf: basal and cauline, proximal opposite, often withered before flower, 4–15+ cm, most alternate, ± sessile, narrowly spatula-shaped to linear or distal lanceolate, entire or serrate, soft-hairy to bristly, distal glandular-hairy and/or with marginal tack-shaped glands. Inflorescence: heads radiate, 1 or in ± raceme- to panicle- or spike-like clusters; peduncle bracts with 1+ tack-shaped glands on tip or margins; involucre bell-shaped or obconic to spheric, 3–9+ mm diam; phyllaries 5–13, elliptic to lanceolate or oblanceolate, each ± half enclosing a ray ovary, falling with fruit, 4.5–7.5 mm, hairy or ± glabrous, generally with tack-shaped glands; receptacle flat, minutely bristly; paleae in 1 series between ray and disk flowers, free, deciduous. Ray flower: 5–13; corolla ± white, ray 5–10+ mm, generally red- or purple-veined abaxially, lobes ± parallel, 1/4–1/2 length of ray. Disk flower: 5–35(60+); corolla 4–5.5 mm, ± white to ± purple, tube < throat, lobes lanceolate; anthers ± dark purple, tips ovate to ovate-deltate; style glabrous proximal to branches, style tips awl-shaped, densely short-bristly. Fruit: 3.5–4 mm, club-shaped, ± round in ×-section or compressed front-to-back, 10-ribbed, densely ascending-hairy, ray pappus 0 or crown-like; disk pappus similar or of 12–20+, awl-shaped, ± red-brown, ciliate to plumose scales.
2 species. (For resemblance to Blepharipappus and position in Hemizonia, where originally named as a subgenus) [Baldwin & Strother 2006 FNANM 21:289–291] Self-sterile.
Unabridged disk flower: anther bases sagittate.
Unabridged references: [Baldwin et al. 2001 Syst Bot 26:184–194; Gregory et al. 2001 Madroño 48:271–285]

Key to Blepharizonia

1. Disk pappus 0 or 0.1–1 mm; leaves ± yellow-green, distal generally densely stalked-glandular and with scattered to abundant tack-shaped glands; heads 1 or in ± open, raceme- to panicle-like clusters; branches ± wand-like ..... B. laxa

1' Disk pappus 1.5–3 mm; leaves gray-green, sparsely or not stalked-glandular except for scattered tack-shaped glands; heads generally in ± spike- to panicle-like clusters; branches often arched-ascending ..... B. plumosa

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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