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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus: Prenanthella||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Prenanthella exigua (A. Gray) Rydb.
Habit: Annual 5--30 cm; sap milky. Stem: slender, generally openly much-branched, sparsely glandular-puberulent. Leaf: basal, 1--3 cm, spoon-shaped to oblanceolate, entire to dentate or irregularly lobed, teeth often minutely spine-tipped, faces glabrous; cauline reduced, distal scale-like. Inflorescence: heads liguliflorous, many, in open, intricately-branched, panicle-like clusters; peduncle slender; involucre cylindric; phyllaries in 2 series, outer 2--3, < 1 mm, deltate, inner 3--5, 3--5 mm, lance-linear, not reflexed in fruit; receptacle flat or +- convex, glabrous, epaleate. Flower: 3--4; ligules 1.5--2 mm, light pink or white. Fruit: 2.5--3.5 mm, cylindric, 5-ribbed and grooved, +- white to pale brown; pappus of 80+ stiff, minutely barbed bristles, 2--3 mm, white. Chromosomes: 2n=14.
Ecology: Desert slopes and washes to sagebrush/juniper woodland; Elevation: < 1900 m. Bioregional Distribution: SNE, D; Distribution Outside California: to Oregon, Colorado, western Texas, northern Mexico. Flowering Time: Mar--Jun
Synonyms: Lygodesmia exigua A. Gray
eFlora Treatment Author: Kenton L. Chambers
Jepson Online Interchange
Previous taxon: Prenanthella
Next taxon: Psathyrotes
Citation for this treatment: Kenton L. Chambers 2017. Prenanthella exigua, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=4461, accessed on February 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 24, 2017.