Home Brassicaceae
About
Name Search
Genera
Species List
Streptanthus cordatus Nutt. 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: A Flora of North America: containing . . . 1(1): 77–78. 1838. (Fl. N. Amer.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

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

Export To PDF Export To Word

11. Streptanthus cordatus Nuttall in Torrey & A. Gray, Fl. N. Amer. I: 77. 1838.

     Herbs, perennial, glabrous throughout except for petioles of basal leaves and sometimes sepals, glaucous; caudex simple or few branched. Stems (1–)3–9(–11) dm, simple or few branched. Basal leaves rosulate, with broadly winged, setose-ciliate petioles, spatulate to obovate, rarely narrowly oblanceolate, 1.5–8(–11) cm, dentate at least distally; middle cauline leaves broadly oblong to ovate or suborbicular to lanceolate, 2–9 x 0.7–4.5(–6) cm, sessile, auriculate to amplexicaul, entire or few-toothed, rounded or acute to acuminate at apex, not overlapping; upper leaves smaller in size, reduced. Racemes ebracteate, lax, without a terminal cluster of sterile flowers; fruiting pedicels divaricate-ascending, straight, 3–11(–14) mm. Flowers: sepals forming campanulate calyx, greenish brown to purple, lateral pair basally subsaccate, broadly oblong, 5–12 mm, not keeled, glabrous or subapically bristly; petals purple to brownish, 9–15 mm; blade 2–6 x 0.7–1 mm, recurved or not, not crisped; claw purplish, 7–10 mm, wider than blade; filaments in 3 pairs of unequal length, free; adaxial pair 7.5–10 mm; abaxial pair 5–7 mm; lateral pair 4–5 mm; anthers of all stamens fertile, 2.5–5 mm. Fruits 5–10.5(–14.5) cm x (2.5–)3–6(–7) mm, ascending to divaricate-ascending, flattened, straight, not torulose; valves glabrous, with a distinct midvein; gynophore 0.5–1.5 mm; replum straight; style 0.2–3 mm; stigma slightly to prominently 2-lobed; ovules and seeds 20–38(–46) per fruit. Seeds broadly oblong to suborbicular, 2.5–5 x 2.2–5 mm; wing continuous, 0.1–0.9 mm wide.

Flowering: Apr–Jul.

Habitat: dry stony slopes, sandy draws, limestone ledges, gravelly knolls, pinyon-juniper woodlands, sagebrush, open pine forests; open chaparral, cypress woodland.

Elevation: 500–3100 m.

Distribution: United States (Arizona, California, Colorado, Idaho, New Mexico, Nevada, Oregon, Utah, Wyoming).

Two varieties, W United States.

 

 

Export To PDF Export To Word

                                          Key to the varieties of Streptanthus cordatus

1. Middle cauline leaves ± rounded to obtuse at apex, broadly oblong to ovate or

     suborbicular; basal leaves obovate to spatulate, obtuse or rounded at apex.................. 11a. var. cordatus

1. Middle cauline leaves acuminate or acute at apex, lanceolate; basal leaves narrowly 

    oblanceolate, acuminate at apex   ................................................................................ 11b. var. piutensis

 


 

 
 
© 2014 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110