MUSTARD FAMILY 243 



not saccate- petals narrowly spatulate, 8-11 mm. long, red-purple; inflorescence racemose; pedi- 

 cels nearly or quite horizontal, 3-5 mm. long ; pods arcuate, ascending, terete, slightly torulose, 

 3-4.5 cm. long; stipe 2-3 mm. long; style less than 1 mm. long; stigma entire, small. 



A rare species known only from the Arid Transition Zone in northeastern Oregon. Type locality: Baker 

 City, Oregon. June. 



2. Thelypodium brachycarpum Torr. Short-podded Thelypodium. Fig. 1924. 



Tkelypodium brachycarpum Torr. Bot. Wilkes Exp. 231. pi. 1. 1874. 

 Thelypodiopsis brachycarpa O. E. Schulz, Bot. Jahrb. 66: 98. 1933. 



Biennial, glabrous or sparsely pilose towards the base, the stems 3-15 dm. high, simple or 

 virgately branched, rather stout. Basal leaves oblanceolate or spatulate, definitely toothed to 

 deeply lyrate-pinnatifid. 4-6 cm. long ; stem leaves 1-5 cm. long, narrow, acute, entire or toothed, 

 basal lobes acute ; sepals and petals white or pale yellow, the former linear-lanceolate, acute, the 

 latter linear, 2-3 times as long as the sepals ; stamens exserted, the filaments nearly equal ; inflores- 

 cence dense, racemose ; pedicels stout, 1-2 mm. long, divergent ; pods unequally torulose, ascending, 

 15-30 mm. long; stipe 1-1.5 mm. long; style about 0.5 mm. long, stigma truncate, small. 



Transition Zone; northern California and southern Oregon. Type locality: "On the Klamet [Klamath] 

 River, southern borders of Oregon." June-Aug. 



3. Thelypodium crispum Greene. Crisped Thelypodium. Fig. 1925. 



Thelypodium crispum Greene ex Payson, Ann. Mo. Bot. Gard. 9: 264. 1923. 

 Thelypodiopsis crispa O. E. Schulz, Bot. Jahrb. 66: 98. 1933. 



Very similar in appearance to T. brachycarpum; sepals white or sometimes roseate or 

 purplish; pedicels slender, 3-5 mm. long, erect; pods unequally torulose, 1.5-3 cm. long; stipe 

 about 1 mm. long. 



Transition Zone; eastern California from Lassen County to northern Inyo County, and in adjacent western 

 Nevada. Type locality: Eagle Valley, Ormsby County, Nevada. June-July. 



4. Thelypodium Howellii S. Wats. Howell's Thelypodium. Fig. 1926. 



Thelypodium Howellii S. Wats. Proc. Amer. Acad. 21:445. 1886. 

 Streptanthus Howellii M. E. Jones, Proc. Calif. Acad. II. 5: 623. 1895. 

 Thelypodium simplex Greene, Pittonia 4: 200. 1900. 

 Thelypodiopsis Howellii O. E. Schulz, Bot. Jahrb. 66: 98. 1933. 



Biennial, more or less hispid-pubescent near the base, otherwise glabrous, somewhat glaucous, 

 the stems slender, erect, simple or sparingly branched, 3-8 dm. high. Basal leaves oblanceolate, 

 2-4 cm. long, lyrately toothed; sepals purplish, scarious-margined, about 7 mm. long; petals 

 pale blue or purple, spatulate, crisped, twice as long as the sepals; inflorescence racemose, lax; 

 pedicels ascending, about 5 mm. long, stout; pods erect or ascending, 2-5 cm. long, about 1 mm. 

 wide; stipe less than 0.5 mm. long; style about 1 mm. long. 



Upper Sonoran and Transition Zones; eastern Oregon to northeastern California. Type locality: Camp 

 Polk in Harney Valley, eastern Oregon. June-July. 



5. Thelypodium sagittatum (Nutt.) Endl. Sagittate Thelypodium. Fig. 1927. 



Streptanthus sagittatus Nutt. Journ. Acad. Phila. 7: 12. 1834. 

 Thelypodium sagittatum Endl. in Walp. Rep. 1: 172. 1842. 

 Thelypodium Nuttallii S. Wats. Bot. King Expl. 26. 1871. 

 Thelypodium torulosum Heller, Bull. Torrey Club 25: 265. 1898. 

 Thelypodiopsis sagittata O. E. Schulz, Bot. Jahrb. 66: 99. 1933. 



Biennial or short-lived perennial, glaucous, glabrous or sparsely hirsute near the base, the 

 stems usually branched from the base as well as upwards, 3-7 dm. high. Basal leaves entire, 

 oblanceolate, 4-12 cm. long ; stem leaves acute or obtuse ; sepals purplish with scarious margins, 

 5-7 mm. long; petals white to deep purple, 2-3 times as long as the sepals, blade_ oblanceolate, 

 gradually narrowed to the slender subequal claw ; inflorescence corymbose, elongating and race- 

 mose when mature; pedicels divergent-ascending, 5-12 mm. long; pods 2-6 cm. long; stipe 

 nearly or quite obsolete ; style 1-1 . 5 mm. long. 



Upper Sonoran and Transition Zones; central Washington to western Montana, Wyoming, northern 

 Colorado, Utah, and northern Nevada. Type locality: Little Lost River, Idaho. May-Aug. 



6. Thelypodium stenopetalum S. Wats. Slender-petalled Thelypodium. 



Fig. 1928. 



Thelypodium stenopetalum S. Wats. Proc. Amer. Acad. 22: 468. 1887. 

 Thelypodiopsis stenopetala O. E. Schulz, Bot. Jahrb. 66: 99. 1933. 



Probably biennial, glabrous and glaucous throughout, the stem branched from the base, 

 simple or sparingly branched above, slender, 3-6 dm. high. Basal leaves soon withering, oblan- 

 ceolate, entire or repand ; sepals purplish or green, linear, about 1 cm. long ; petals narrowly 

 linear, somewhat crisped, white or roseate, at least one-half longer than the sepals; anthers 

 coiled when dry; inflorescence elongated, lax, racemose even before anthesis; pedicels ascending, 

 4-6 mm. long ; pods slender, ascending, 4-5 . 5 cm. long ; stipe obsolete ; style not more than 1 

 mm. long ; stigma very slightly 2-lobed. 



Transition Zone; Bear Valley, San Bernardino Mountains, California. Type locality: Upper Lake, Bear 

 Valley, California. June. 



