Sisymbrium. CRUCIFEfLE. 41 



* * Seeds in one row. 

 + Leaves pinnate or bipinnate. 



2. S. incisum, Erigelm. Annual ; pubescence short, more or less glandular : 

 stems branched, 1 to 4 feet high : leaves pinnate, the segments linear to ovate- 

 oblong, more or less deeply pinnatifid, sometimes entire : petals yellow, about 1^ 

 lines long : pods narrowly linear, usually pointed at both ends, half an inch long 

 and 8-1 2-seeded, or sometimes much shorter and few-seeded, mostly exceeding the 

 spreading pedicels. Gray, PI. Fendl. 8. Smelowskia (?) California^, Gray, Proc. 

 Am. Acad. vi. 520. Sisymbrium Calif ornicum, Watson, Bot. King Exp. 23, fide 

 Gray in Am. Jour. Sci. 3 ser. iii. 150. 



Var. filipes, Gray. A form Avith divaricate pedicels, 6 to 8 lines long, exceed- 

 ing the pods. PL Fendl. 8. S. longepedicellatum, Fourn. Sisymb. 59, excl. syn. 



Var. Hartwegianum, Watson, has the rather short pods on somewhat appressed 

 or nearly erect pedicels about 2 lines long. S. Hartwegianum, Fourn. 1. c. 66. 



In dry soils in the Sierra Nevada at 6,000 to 10,000 feet elevation (Brewer), and in the moun- 

 tains northward and eastward to Washington Territory, Winnipeg Valley, and New Mexico. The 

 var. filipes occurs both from Oregon (Spalding), perfectly glabrous, and from Arizona (Pal'iner), 

 canescent with a fine dense pubescence. Frequent intermediate forms connect var. Hartwegi- 

 anum with the typical state. 



A peculiar type, perhaps distinct, with short clavate almost pointless pods, 2 to 3 lines long, 

 on still shorter pedicels, was collected by Tolmie in the " Snake Country " (S. brarhycarpum of 

 Bot. Beechey, not Richardson), and more recently by Dr. Gray in Humboldt Valley, Nevada. It 

 will probably be found in Northeastern California. 



-f- -f- Leaves pinnatifid or. sometimes entire. 



3. S. reflexum, Nutt. Annual, with scattered simple hairs : stems rather slen- 

 der, often simple, ^ to 2 feet high : leaves 2 to 4 inches long, pinnatifid with divari- 

 cate toothed segments, the upper often only sinuate-toothed : petals rose-color, white 

 or yellowish, l- to 2 lines long : pod slender, 1 to 2 inches long, half a line wide, 

 terete, strongly deflexed, straight or somewhat curved, on short pedicels. PI. Gam- 

 bel. 183. Turritis (?) lasiophylla, Hook. & Arn. Bot. Beechey, 321. S. defexum, 

 Harv. ; Torrey, Pacif. E. Rep. iv. 66 ; Founder, 1. c. 108. 



From the Columbia River to S. California, mostly near the coast ; Guadalupe Island (Palmer) ; 

 S. Utah, Parry. Characterized by its deflexed pods. 



4. S. junceum, Bieb. Perennial, glabrous, glaucous : stems branched, 1 to 1| 

 feet high : leaves narrowly oblanceolate or linear, I to 2 inches long, attenuate to a 

 narrow base, entire or sometimes pinnatifid with a few narrow segments : petals 

 light yellow, 3 lines long : pods ascending on short spreading pedicels, 10 to 15 

 lines long, half a line broad ; style short and thick ; stigma broad and 2-lobed. 

 Torr. & Gray, Fl. i. 91; Watson, 1. c. S. pygmceum & linifolium, Nutt. ; Torr. & 

 Gray, Fl. i. 91. Erysimum (?) glaberrimum, Hook. & Arn. Bot. Beechey, 323. 



Oregon to Montana ; Snake Country (Tolmie) ; East Humboldt Mountains, Nevada (Watson) : 

 will probably be found in Northeastern California. It is also native to Siberia. 



5. S. acutangulum, DC. Annual, hirsute with scattered simple hairs : stems 

 1 to 2 feet high, with ascending branches : leaves petioled. runcinate-pinnatifid, 2 

 to 6 inches long : petals yellow or yellowish, 1 to 2 lines long : pods terete, 1 to 

 1J inches long, less than a line wide, erect or ascending on very short pedicels. 



A native of S. Europe, naturalized near the older towns from San Francisco to Los Angeles. 



6. S. officinale, Scop. Annual or biennial, sparingly hirsute, divaricately 

 branched : leaves runcinately pinnatifid, 3 to 6 inches long : flowers small, light 

 yellow : pods terete, half an inch long, a line wide, tapering from the base to a 

 sharp point, nearly sessile, closely appressed in a long slender raceme. 



A homely weed, originally from Europe, rare in California but very frequent in the Atlantic 



States. 



