Sisymbrium. CRUCIFER^. ^-i 



* * Seeds in one row. 

 ■f- Leaves idnnate or hipinnate. 

 2. S. incisum, Engelm. Annual ; pubescence sliort, more or less glandular : 

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

 oblong, more or less deeply pinnatiiid, sometimes entire : petals yellow, about 1 \ 

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

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

 spreading pedicels. — Gray, PI. Fendl. 8. Smeloivskia (1) Califomica, Gray, Proc. 

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

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



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

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



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

 or nearly erect pedicels about 2 lines long. — ^S*. Hartwegianum, Fourn. 1. c. &%. 



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

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

 var. filipes occurs both from Oregon {Spalding), perfectly glabrous, and from Arizona {Palmer), 

 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'. Irachyearpum of 

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

 will probably be found in Northeastern California. 



-I- Jr- Leaves pinnatifid or sometimes entire. 



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

 der, often siinple, i 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, Avhite 

 or yellowish, 1^ to 2| Hues 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 (1) lasiophylla, Hook. & Arn. Bot. Beechey, 321. S. deflexura, 

 Harv. ; Torrey, Pacif. R. Eep. iv. 66 ; Fournier, 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 1 

 feet high : leaves narrowly oblanceolate or linear, 1 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. pygmoitim & linifolium, Xutt. ; Torr, & 

 Gray, Fl. i. 91. Erysimum (1) glaberrimiim. 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 

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



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



6. S. ofScinale, 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 fre<juent in the Atlantic 

 States. 



