Directory       News       Site Map       Home
         
    Jepson eFlora
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.

 

STEBBINSOSERIS

Kenton L. Chambers


Annual, ± scapose; sap milky. Leaf: generally all basal, entire to pinnately lobed, glabrous or mealy, hairs drying as minute, white scales. Inflorescence: heads, liguliflorous, 1 on naked peduncle, ± nodding in bud; involucre glabrous; phyllaries in 2–4 series, ± lanceolate, reflexed when dry, outer < 1/3 × inner; receptacle flat, epaleate, ± pitted. Flower: 8–many; ligules equaling or slightly surpassing involucre, white or yellow, abaxially often ± red, readily withering. Fruit: 10-ribbed, gray to brown or ± purple; pappus scales 5, ± cut at tip, dull white (silvery) to ± brown, bristle-tip finely barbed.
2 species: western North America. (Greek: Stebbins' chicory, for G.L. Stebbins, Jr., American geneticist, evolutionist, 1906–2000) [Chambers 2006 FNANM 19:346–347] Species derived independently by hybridization: Uropappus lindleyi × annual Microseris.
Unabridged references: [Jansen et al. 1991 Amer J Bot 78:1015–1027]

Key to Stebbinsoseris

1. Fruit spindle-shaped, ± dark brown to ± purple, 5–8 mm, tip not widened at base of pappus; pappus scales 3–5 mm; n&c Central Coast, rare ..... S. decipiens

1' Fruit spindle-shaped to columnar, sometimes narrowed and long-tapered above, generally gray to pale brown or violet (or ± dark purple in South Coast) 4.5–12 mm, tip slightly widened at base of pappus; pappus scales 4–11 mm; widespread ..... S. heterocarpa

Contact/Feedback

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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.