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Streptanthus longisiliquus G.L. Clifton & R.E. Buck 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: Madroño 54(1): 94–98, f. 1, 2 [map]. 2007. (Madroño) Name publication detail
 

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

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24. Streptanthus longisiliquus G. L. Clifton & R. E. Buck, Madroño 54: 94. 2007. TYPE: United States, California, Butte Co., ca. 0.8 km N of Robley Point, steep raod bank, 39°52′21˝N, 121°31′06˝W, 13 Jun 1997, G. Clifton 35529 (holotype, JEPS; isotypes, CAS, CHSC, MO!, NY!, PUA, RSA).

     Herbs, perennial, short lived, glabrous throughout except for sepals and sometimes petioles, glaucous; caudex simple or few branched. Stems 2.2–12(–15) dm, few branched. Basal leaves rosulate in juvenile plants, with glabrous or rarely ciliate petioles, obovate to spatulate, 3.5–10 cm; middle cauline leaves broadly oblong to ovate or suborbicular, 2.5–10 x 1–3.5 cm, sessile, amplexicaul, entire, not overlapping; upper leaves smaller in size, reduced. Racemes ebracteate, lax, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 5–10 mm. Flowers: sepals forming subcampanulate calyx, yellow greenish proximally, purple distally, oblong, 6–8 mm, not keeled, with a subapical tuft of hairs; petals with yellow-green claws and purple to brownish blades, 8–12 mm; blade not crisped, 1–3 x 0.5–0.8 mm; claw 6–10 mm, wider than blade; filaments in 3 pairs of unequal length, free; adaxial pair 7–10 mm; abaxial pair 6–8 mm; lateral pair 4–6 mm; anthers of all stamens fertile, 3.5–5 mm. Fruits 5–13(–15) cm x 2–2.5 mm, arcuate, descending, flattened, not or only slightly torulose; valves glabrous, with distinct midvein; gynophore 0.3–1 mm; replum straight; style 1.5–3.5 mm; stigma entire; ovules and seeds 50–82 per fruit. Seeds oblong, 2.2–3 x 1.4–1.8 mm; wing continuous, 0.1–0.4 mm wide.

Flowering: May–July.

Habitat: openings in pine forests, oak woodland.

Elevation: 400–1700 m.

Distribution: United States (California/Butte, Shasta, and Tehama counties).

 

 
 


 

 
 
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