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Streptanthus howellii S. Watson Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

Published In: Proceedings of the American Academy of Arts and Sciences 20: 353. 1885. (Proc. Amer. Acad. Arts) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/24/2009)
 

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21. Streptanthus howellii S. Watson. Proc. Amer. Acad. Arts 20: 353. 1885; Cartiera howellii (S. Watson) Greene, Leafl. Bot. Observ. Crit. 1: 226. 1906. TYPE: United States, Oregon, Curry Co., Coast Mts., 12 June 1884, Thomas J. Howell 39 (holotype, GH!).

     Herbs, perennial, glabrous, glaucous; caudex simple or branched. Stems 3–8 dm, simple or rarely branched above. Basal leaves not rosulate, petiolate, rather fleshy, soon withering; middle cauline petiolate, broadly spatulate-obovate to suborbicular, 1.5–10 x 0.5–4.5 cm, entire to repand or obtusely dentate; upper leaves narrowly oblong-oblanceolate to linear, cuneate to attenuate at base, not auriculate, entire. Racemes ebracteate, without a terminal cluster of sterile flowers, lax; fruiting pedicels divaricate to ascending, straight, 0.7–1.7 cm. Flowers: sepals forming subcampanulate calyx, purplish, oblong, 5–8 mm, not keeled; petals maroon to purple, 8–12 mm; blade 3–5 x 0.5–1 mm, not crisped; claw 5–7 mm, wider than blade; filaments in 3 pairs of unequal length, free; adaxial pair 6–7 mm; abaxial pair 5–6 mm; lateral pair 4–5 mm; anthers of all stamens fertile, 3–3.5 mm. Fruits 5.5–12 cm x 2.5–3.2(–3.5) mm, divaricate-ascending, straight to slightly curved inwards, not torulose; valves glabrous, with a distinct midvein; gynophore 0.5–5 mm; replum straight; style 0.3–3 mm; stigma subentire; ovules and seeds 24–44 per fruit. Seeds broadly oblong to suborbicular, 3–4 x 2–3 mm; wing continuous, 0.5–1.1 mm wide. 2n = 28.

Flowering: Jun–Jul.

Habitat: dry serpentine slopes and ridges in open conifer-hardwood forests.

Elevation: 600–800 m.

Distribution: United States (N California/Del Norte and Siskiyou counties, S Oregon/Curry and Josephine counties).

 

 
 
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