MUSTARD FAMILY 249 



commonly branched from near the base, the branches mostly spreading. Lower stem leaves 

 oblanceolate to obovate, narrowed to a short petiole or subsessile, irregularly dentate, 12-25 mm. 

 long, those subtending the branches clasping and the upper becoming reduced, linear and entire ; 

 racemes loosely flowered; sepals dark purple, 4-5 mm. long, somewhat connivent above, the 

 tips recurved-spreading and white-margined; petals white with purple veins, 6-7 mm. long; 

 upper pair of filaments united, the lower pair united for half their length; pod 2.5-3 cm. long, 

 falcate-spreading ; seeds winged, 2 mm. long. 



Serpentine outcrops, Humid Transition Zone; Mount Tamalpais, Marin County, California. May-June. 



8. Streptanthus Breweri A. Gray. Brewer's Streptanthus. Fig. 1943. 



Streptanthus Breweri A. Gray, Proc. Calif. Acad. 3: 101. 1864. 

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



Annual, glabrous and glaucous throughout, the stem branching from the base, 2-6 dm. high. 

 Lower leaves broadly ovate or obovate, clasping, acute at apex, denticulate or usually entire, 

 rather thick, 3-12 cm. long; the uppermost stem leaves lanceolate, entire, much reduced; sepals 

 purplish, glabrous or pubescent, tips recurved; petals well exserted, narrow; longer filaments 

 connate ; fruiting pedicels 2-3 mm. long ; pods erect or ascending, usually somewhat incurved, 3-5 

 cm. long, 1 mm. broad ; stigma sessile or nearly so ; seeds small, marginless or slightly winged 

 at apex. 



Upper Sonoran Zone; Inner Coast Ranges, Lake County to San Benito County, California. Type locality: 

 "Mt. Diablo Range, near head of Arroyo del Puerto, at an altitude of 3,200 feet," Stanislaus County, California. 

 May-June. 



9. Streptanthus hesperidis Jepson. Jepson's Streptanthus. Fig. 1944. 



Streptanthus hesperidis Jepson, Erytbea 1: 14. 1893. 

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

 Streptanthus Breweri var. hesperidis Jepson, Fl. Calif. 2: 33. 1936. 



Annual, glabrous and glaucous throughout, the stems slender, divaricate-branched or simple, 

 2-4 dm. high. Lower leaves cordate-clasping, elliptic-ovate, usually obtuse, rather thin, the 

 upper reduced, ovate to ovate-lanceolate; racemes loosely flowered; calyx regular; sepals 6-7 

 mm. long, acute, with recurved tips, green or purple, the lateral ones with scarious margins at 

 the apex ; upper petals white, the lower dark purple with purple veins and white margins ; upper 

 pair of filaments wholly connate, middle pair slender, lowest much broader ; pods about 4-6 cm. 

 long, 1-1.5 mm. broad, torulose, recurved and spreading or reflexed; seeds oblong, somewhat 

 flattened, usually margined at apex. 



Upper Sonoran Zone; Lake and Napa Counties, California. Type locality: Lower Lake, Lake County. 

 June-July. 



10. Streptanthus barbiger Greene. Bearded Streptanthus. Fig. 1945. 



Streptanthus barbiger Greene, Pittonia 1: 217. 1S88. 

 Mesoreanthus barbiger Greene, Leaflets Bot. Obs. 1 : 89. 1904. 

 Mesoreanthus fallax Greene, op. cit. 1: 218. 1904. 

 Mesoreanthus vimineus Greene, op. cit. 1: 218. 1904. 



Glabrous and glaucous annual, or the calyx sometimes hirsute, branching well above the 

 base, 3-6 dm. high. Lower leaves linear, often 6-10 cm. long, entire, the upper narrowly linear to 

 almost filiform ; racemes loosely flowered ; pedicels erect, 2-3 mm. long ; sepals similar, 6-7 mm. 

 long, purple or rarely green, the tips recurved and white-margined ; petals not crisped, upper 

 pair white, the lower pair purple with white margins ; pods spreading, and more or less 

 recurved, 5-7 cm. long, scarcely 2 mm. wide ; seeds without a winged margin. 



Rocky (mainly serpentine) ridges, Upper Sonoran and Arid Transition Zones; Lake and Napa Counties, 

 California. Type locality: Highland Springs, Lake County, California. May-July. 



11. Streptanthus glandulosus Hook. Common Jewel Flower. Fig. 1946. 



Streptanthus glandulosus Hook. Ic. PI. 1 : pi. 40. 1837. 



Annual, nearly glabrous to densely setose-hirsute, especially below, the stems usually 

 branched upwards, 2-6 dm. high, rather slender. Lower leaves petioled, narrowly oblanceolate, 

 coarsely and saliently dentate, the teeth usually callus-tipped; upper leaves dentate to entire, 

 lanceolate to linear, auriculate-clasping ; inflorescence racemose, lax ; sepals usually deep purple, 

 sometimes nearly white, 3 upper ones connivent, the lower one spreading ; petals purple or white 

 with purple veins, the blades recurved ; longest filaments connate ; pods straight or curved, 

 ascending or spreading, 5-9 cm. long, about 3 mm. wide, frequently hispid. 



Upper Sonoran Zone: western central California from Sonoma and Solano Counties to San Luis Obispo 

 County. Type locality: "Monterey, California." April-May. 



Streptanthus glandulosus var. albidus (Greene) Jepson, Man. Fl. PI. Calif. 419. 192S. (Streptanthus 

 albidus Greene, Pittonia 1: 62. 1887.) Glabrous or very sparsely setose, the leaves more nearly entire than 

 in the species; sepals white; petals white with purple veining; pods erect. Upper Sonoran Zone, Santa Clara 

 Valley, California. Type locality: "a few miles below San Jose." 



Streptanthus glandulosus var. pulchellus (Greene) Jepson, Man. Fl. PI. Calif. 420. 192S. (Streptanthus 

 pulchellus Greene, Pittonia 2: 225. 1892.) Stem branclieu. from near the base, 1-3 dm. high, lateral branches 

 usually long, the leaves and stems densely setose-hirsute. Upper leaves clasping at the base; pods erect, usually 

 setose. This is likely to be confused with S. hispidus, to which it is undoubtedly closely related. Upper Sonoran 

 Zone, Marin County, California. Type locality: Mount Tamalpais. Some eight other segregates of this poly- 

 morphic species have been proposed by Greene. 



