248 BRASSICACEAE 



above the base, 3-9 dm. high. Basal leaves broadly spatulate-obovate, variously dentate, espe- 

 cially toward the apex, sometimes setose-ciliate ; stem leaves entire or dentate toward the apex, 

 sagittate at the base; sepals greenish or purplish, 8-10 mm. long; petals narrow, recurved, 12-15 

 mm. long; stamens distinct; pods strongly flattened, erect or ascending, 4-9 cm. long, about 4 

 mm. broad; style 2-3 mm. long; stigma distinctly 2-lobed. 



Dry slopes and ridges, Upper Sonoran and Arid Transition Zones; eastern Oregon to California east 

 of the Sierra Nevada, eastward to southern Wyoming and northern Arizona. Type locality: "Forests of the 

 Rocky Mountains" — probably in Wyoming. May-July. 



3. Streptanthus barbatus S. Wats. Bearded Streptanthus. Fig. 1938. 



Streptanthus barbatus S. Wats. Proc. Amer. Acad. 24: 125. 1889. 

 Cartiera barbata Greene, Leaflets Bot. Obs. 1: 226. 1906. 



Glabrous and glaucous, short-lived, perennial, the stems simple or somewhat branched, 

 rather slender, 2-5 dm. high, often curved. Leaves numerous, longer than the internodes, all 

 similar and nearly equal, cordate, sessile, clasping, 1-2.5 cm. long, entire or sparingly dentate 

 especially toward the apex ; sepals obtuse or subacute, purple, sparsely bearded at the apex, 6-8 

 mm. long; petals little exserted, purplish; pedicels erect or ascending, 4-6 mm. long; pods 

 spreading, curved, 2.5-5 cm. long, 2-3 mm. wide, flattened; style 1-2 mm. long; stigma entire; 

 seeds narrowly margined. 



Transition Zone in the interior region of northern California. Type locality: "Along the Upper Sacra- 

 mento." June-Aug. 



4. Streptanthus Howellii S. Wats. Howell's Streptanthus. Fig. 1939. 



Streptanthus Howellii S. Wats. Proc. Amer. Acad. 20: 353. 1885. 

 Cartiera Howellii Greene, Leaflets Bot. Obs. 1 : 226. 1906. 



Perennial, glabrous throughout, the stems 3-6 dm. high. Leaves obovate-spatulate below to 

 narrowly oblong-spatulate above, 3-6 cm. long, obtuse, entire, not clasping at the base; sepals 

 broad, 5-8 mm. long, greenish ; petals with an oblong dark purple limb, not greatly exceeding 

 the sepals ; inflorescence lax, racemose ; pedicels 1-1 . 5 cm. long, ascending ; pods ascending or 

 spreading, 5-9 cm. long; style short, stout; stigma entire. 



Transition Zone; southwestern Oregon. Type locality: "Coast mountains, near the California line, in 

 Curry County, Oregon." July-Aug. 



5. Streptanthus tortuosus Kell. Mountain Streptanthus. Fig. 1940. 



Streptanthus tortuosus Kell. Proc. Calif. Acad. 2: 152. pi. 46. 1863. 

 Streptanthus foliosus Greene, Pittonia 3: 226. 1897. 

 Pleiocardia tortuosa Greene, Leaflets Bot. Obs. 1 : 86. 1904. 



Stout annual or biennial, glabrous and more or less glaucous throughout, stems sparingly 

 paniculate-branching above, 2-10 cm. high. Lower leaves oblanceolate, narrowed to a winged 

 petiole, 4-8 cm. long, entire or toothed ; middle stem leaves spatulate-oblong or obovate, auricu- 

 late-clasping, toothed ; uppermost leaves including some bracts of the inflorescence oblong-ovate 

 or cordate-oblong, clasping the stem by a deep closed sinus, mostly entire ; flowers purplish, 

 sepals with recurved tips, exceeded by the purple-veined, yellowish petals; pods 6-15 cm. long, 

 1.5-3 mm. wide, divaricate or, usually, recurved and falcate. 



Transition and Canadian Zones; Sierra Nevada and Coast Ranges of California and adjacent Nevada. 

 Type locality: "from the copper region of the Sierra Nevada Mountains." April-Sept. 



Streptanthus tortuosus var. orbiculatus (Greene) Hall, Univ. Calif. Pub. Bot. 4: 197. 1912. Lower 

 than the species, its stems slender and more diffusely branched from the base; flowers smaller, dark purple. 

 Boreal Zones; southern Oregon to the North Coast Ranges and Sierra Nevada, California. Type locality: 

 "Donner Lake, California." 



Streptanthus tortuosus var. suffrutescens (Greene) Jepson, Man. Fl. PI. Calif. 418. 1925. Short-lived 



f>erennial, with the main stem caudex-like and suffrutescent. Inner Coast Ranges, northern California. Type 

 ocality: Hood's Peak, Sonoma County, California. 



Streptanthus tortuosus var. flavescens Jepson, Man. Fl. PI. Calif. 418. 1925. Distinguished from the 

 typical species by the yellow flowers. Sawtooth Range, California. Type locality: Coyote Pass, Tulare County, 

 California. 



6. Streptanthus gracilis Eastw. Alpine Streptanthus. Fig. 1941. 



Streptanthus gracilis Eastw. Proc. Calif. Acad. III. 2: 285. 1902. 

 Pleiocardia fenestrata Greene, Leaflets Bot. Obs. 1: 86. 1904. 



Annual, from a slender root, glabrous and glaucous, the stems simple or branched from 

 the base, slender, 2-4 dm. high. Basal leaves orbicular to narrowly elliptical or spatulate, 

 sinuate-dentate to obtusely lobed or lyrate ; petioles long, slender ; stem leaves entire to deeply 

 lobed, the uppermost sessile and clasping ; lowest flowers bracteate ; calyx purple, urceolate, tips 

 of sepals spreading ; petals rose-pink with a broad blade and slender claw, conspicuously ex- 

 serted ; stamens in three pairs, filaments distinct ; inflorescence rather shortly racemose ; pedicels 

 erect or ascending, 3-6 mm. long; pods shortly stipitate, erect or ascending, 3-7 cm. long, 1-1.5 

 mm. wide. 



Canadian and Hudsonian Zones; southern Sierra Nevada of California. Type locality: "East Lake to 

 Harrison's Pass," Kings-Kern Divide. July-Aug. 



7. Streptanthus batrachopus J. L. Morr. Tamalpais Streptanthus. Fig. 1942. 



Streptanthus batrachopus J. L. Morr. Madrono 4: 204. 1938. 



Annual, glabrous and glaucous, often tinged with purple, the stems 5-15 cm. high, simple or 



