CRUCIFERiE. 23 



Stem-leaves an inch or less long, not clasping: flowers and pods erect 11 



1. S. cordatus, Nutt. Petals 4-6 lines long, yellowish to purple. 



2. S. tortuosus, Kellogg. Petals similar: pods narrower (a line wide). 



3. S. Breweri, Gr. Petals 3-5 lines long, purple: pods 1^ to 2i in. long. 



4. S. Howellii, Watson. Collected in S.W. Or. by Thos. Howell in 1884. 



5. 8. diversifolius, Watson. Pods strongly reflexed, slender. Cosumnes River. 

 C. S. polygaloides, Gr. Sepals yellow: petals purple scarcely exserted. 



7. S. niger, Greene. Petals with purple claw and minute veinles white blade. 



8. S, peramaenus, Greene, calyx magenta: blade cf petals white, purple-veined. 



9. S. glandiilosus. Hook. Petals red-purple, 6 to 8 lines long. 



10. S. hispidus, Gr. Hirsute, 2-5 in. high: red -purple petals 4-6 lines long. 



11. S. fiavescens. Hook. Petals yellowish, linear: sepals half as long, acute. 



8. CHEIRANTHUS, Linnteus. 



1. C. Menziesii, B. & H. Smooth stems scape-like: petals purple. This is PhcenU 

 caulis Menziesii, Greene (the generic name given by Nuttall). 



2. C. asper, C. & S. Stems erect, leafy: petals orange or yellow. 



9. CAULANTHXJS, Watson. 

 1. C. procerus, Wats. Glabrous, 4 to 7 ft. high, stout, branching: flowers greenish- 



10. THELYPODIUM, Endlicher. 



1. T. brachycarpum, Torr. Stem 1 to 5 ft. high: petals slender, white. S. N. Mta. 



2. T. fiavescens, Watson Sepals hairy, yellowish: pod U in. long. 



3. T. lasiophyllum, Greene. {Sisymbrium reflexum Nutt.) Leaves pinnatifid: sterna 

 1 to 5 ft. higli: pods deflexed or eract. 



11. STANLEYA, Nuttall. 

 1. S pinnatiflda, Nutt. Stems several, 1 to 8 ft. high: petals narrow. 



12. ERYSIMUM, Linnaeus. 

 1. E. asperum, DC. Canescent, leafy: petals 8 to 12 lines long. 



13. BRASSICA, Liunseus. 



1. B. nigra, Boiss. Leaves petioled: podB 4-angled, 6 to 9 lines long. 



2. B. campestris, L. Upper leaves clasping: pods 2 or 3 in. long; beak long. 



3. B. f inapistrum, Boiss. Kough-hairy: pods 1 to I^ in. long, ^ beak. 



14. BARBAREA, Robt. Brown. 

 1. B. vulgaris, 11. Br. Perennial, 1 to 3 ft. high: racemes dense, yellow. 

 Var. arcuata, Koch., has pods and pedicles spreading. Wet ground. 



