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Streptanthus callistus J.L. Morrison 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 4(7): 205–208, pl. 31, f. 1–10. 1938. (Madroño) Name publication detail
 

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

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8. Streptanthus callistus J. L. Morrison, Madroño 4: 205. 1938. TYPE: United States, California: Santa Clara Co., Arroyo Bayo, Mt. Hamilton Range, 6.8 mi ESE of Isabel Creek on road to San Antonio Valley, 2000 ft, 5 May 1935, C. W. & H. K. Sharsmith 3074 (holotype, UC!; isotype, GH!).

     Herbs, annual, hirsute, somewhat glaucous. Stems 2–9 cm, simple or branched, bristly especially below. Basal leaves not rosulate, short petiolate, soon withered, oblong-orbicular to obovate, 0.7–1.5 cm, dentate; middle cauline leaves broadly ovate to obovate, 0.8–1.7 x 0.4–1.3 cm, sessile, amplexicaul, hirsute, dentate; upper leaves similar, reduced. Racemes ebracteate, not secund, with a terminal cluster of sterile flowers; fruiting pedicels divaricate, 2–3 mm, hirsute. Flowers: sepals forming narrowly campanulate calyx, green to purplish, narrowly ovate, 3–5 mm, keeled and saccate basally, sparsely hirsute; sterile sepals lilac-purple, linear-lanceolate, not keeled, 8–13 mm, glabrous; petals 8–11 mm, purple with darker purple veins; blade flaring, 4–6 x 2.5–3.5 mm; claw 4–5 mm, narrower than blade; filaments in 3 pairs of unequal length, purple; adaxial pair united nearly to apex, 5–6.5 mm; abaxial pair united, 4–5 mm; lateral pair 2–3 mm; anthers of adaxial stamens sterile, 0.4–0.8 mm; anthers of abaxial and lateral stamens fertile, 1.4–1.8 mm. Fruits 1.3–2.5 cm x 2.5–3.5 mm, divaricate, slightly flattened, curved upwards; valves hispid with setose trichomes 0.5–0.8 mm, with a prominent midvein; gynophore 0.1–0.3 mm; replum straight; style 0.2–0.5 mm; stigma slightly 2-lobed; ovules and seeds 46–60 per fruit. Seeds ovoid, 1.2–1.5 x 0.6–0.8 mm, plump; wing absent. 2n = 28.

Flowering: Apr–May.

Habitat: gravelly sedimentary scree and lag-barrens in chaparral-oak woodlands.

Elevation: 500–900 m.

Distribution: United States (California/Santa Clara Co.).

 

 
 
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