CRUCIFER.S. 89 



15. SISYMBBITJM, Linnaeus. 



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



3 to 6 lines long, pedicels spreading 1, 9 



Leaves pinnatifid or entire: pods 10 to 18 lines long 3, 4 



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



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



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



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



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



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



16. NASTURTIUM, Robt. Brown. 



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



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. VESICABJA, Tournefort 



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



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



3. V. occiden tails. Flowers 4 lines long: pods globose. N. Cal. 



18. TROPIDOCARPTTM, Hooker. 

 1. T. gracile, Hook Leaves pinnatifid: flowers yellow, 3 to 6 lines long. Oal 



19. SUBULARIA, Linnseus. 

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



20. STANFOBDIA, Watson. 

 1. B. Californica, Wats. Flowers 3 or 4 lines long on hairy pedicels, purpla 



21. CAPSELLA, Moench. 



1. C. divaricata, Walp. Very slender, diffuse: pods elliptic oblong. 

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



2fl. THLASPI, Linnaeus. 



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



2. T. Oalifomicuxn, Watson. Pods oblanceolate, acute, 4 or 5 lines long. N. Cal 



