14 CRUCIFERyE. 



15. SISYMBRIUM, Linnseus. 



LeaTei 1-2-pinnate; segments usually pinnatifid: dense racemes: pods acute at both endsi, 



3 to 6 lines long, pedicels spreading 1, 2' 



Leav^es pinnatifid or entire: pods 10 to 18 lines long 3, 4 



Leaves runcinate, 3 to 6 in. long: divaricately branched ft 



1. S. canescens, Nutt. Stems (as in all the species) branching: seeds in 2 rowa. 



2. S. incisum, Englem. Somewhat glandular: petals 1^ lines long. Montajie. 



3. S. JTincemn, Bieb. Glaucous: petals 3 lines long. Oregon. 



4. S. acutangrulum, DC. Hairy: leaves runcinate, 2 to 6 in. long. 

 6. S. officinale, Scop. Similar: pod 6 lines long, tapering to a point. 



16. NASTURTiriM, Robt. Brown. 



1. N. curvisiliqua, Nutt. Leaves pinnatifid: petals but little exserted. 



2. N. obtusum, Nutt. Petals minute: pods 1^ to 3 lines long. 



3. N. officinale, R. Br. Aquatic: petals white, 1^ to 2 lines long. 



17. VESICARIA, Toumefort. 



1. V. montana, Gr. Pods oblong-ovoid, 2 i lines long. N. CaL 



2. V. Kingii, Wats. Leaves 2 to 6 lines long: pods hairy, ovoid. 



3. V. occiden talis. Flowers 4 lines long: pods globose. N. CaL 



18. TROPIDOCARPTJM, Hooker. 

 L T. gracile, Hook. Leaves pinnatitid: flowers yellow, 3 to 6 lines long. OaL 



19. SUBULARIA, LinnsBus, 



1. S. aquatics, L. Flowers minute: pods 1^ lines long. Mono Pass. 



20. STANFORDIA, Watson. 

 L 8. Califomica, Wats. Flowers 3 or 4 lines long on hairy pedicels, pnrpla. 



21. CAPSELLA, Moench. 

 L C. divaricata, Walp. Very slender, diflfuse: pods elliptic oblong. 



2. C. Bursa-pastoris, Moench. Pods cuneate-obcordate. Everywhere. 



22. THLASPI, LinnflBus. 



1. T. alpestre, L. Pods obovate to cuneate-oblong, not acute, beaked. 



2. T. Oalifomicum, Watson. Pods oblanceolate, acute, 4 or 5 lines long. N. CaL 



