|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Perennial herb from taproot, branched caudex, or short rhizome, glandular, sometimes mat-forming. Stem: erect, unbranched, glabrous or stalked-glandular, sometimes with withered, persistent leaf bases. Leaf: basal and cauline, alternate, basal persistent, cauline reduced distally, oblanceolate, 1--3-veined, generally stalked-glandular. Inflorescence: heads radiate, 1--4 per stem in open cluster; involucre bell-shaped; phyllaries in 3--4 +- equal series, lanceolate, 1-veined, outer grading into distal leaves; receptacle convex, pitted, epaleate. Ray Flower: 10--25; ray <= 12 mm, yellow. Disk Flower: 25--65; corolla flaring slightly, yellow; anther tip slender, acute, appendage length 2--4 × width; style tips acute, appendage +- equal or > stigmatic portion. Fruit: narrowly oblong to linear, +- cylindric, fusiform, or compressed, glabrous or hairy; pappus of many +- white bristles in 1 series.
Species In Genus: +- 4--5 species: western North America. Etymology: (Anagram of Stenotus)
eFlora Treatment Author: Lowell E. Urbatsch
Jepson Online Interchange
Key to TonestusPrevious taxon: Tolpis barbata
Next taxon: Tonestus eximius
Citation for this treatment: Lowell E. Urbatsch 2017. Tonestus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=638, accessed on February 26, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 26, 2017.