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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.

 

CALYCOSERIS TACK-STEM

L.D. Gottlieb


Annual; taprooted; sap milky. Stem: 1–3, 5–30 cm, erect or ascending, branched from near base; proximally glabrous, distally conspicuously dotted with tack-shaped glands. Leaf: alternate, sessile; basal blades pinnately lobed, lobes narrow, linear, spreading, ultimate margins entire, smooth; distal cauline reduced to linear bracts. Inflorescence: heads liguliflorous, 1 or in open, few-headed clusters, peduncles 1–3 cm; phyllaries in 2 series, outer unequal, < 1/2 × inner, reflexed, inner lance-linear, equal, scarious-margined, acute, reflexed in fruit; receptacle flat, smooth, each flower subtended by 1 fine, smooth bristle. Flower: many; ligules yellow or white, readily withering. Fruit: fusiform, body tapered to beak, ribs 5, separated by grooves, faces smooth or roughened; pappus of 50+ smooth, white, basally fused bristles, borne on finely toothed cup at beak tip, deciduous.
2 species: southwestern United States, northwestern Mexico. (Greek: alluding to shallow cup on fruit tip and to chicory) [Gottlieb 2006 FNANM 19:307–308] Perhaps best placed in Malacothrix (Lee et al. 2003 Syst Bot 28:616–626).

Key to Calycoseris

1. Ligules yellow; tack-shaped glands red- or purple-tinged; fruit deeply grooved between ribs ..... C. parryi

1' Ligules white; tack-shaped glands straw-colored; fruit shallowly grooved between ribs ..... C. wrightii

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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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