WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 265 
Pods ovate-cordate, 
acute at the apex, 
neither winged 
nor retuse.......- 12. CarpDaRrta (p. 271). 
Pods orbicular or ovate, 
retuse or notched 
at the apex, 
usually winged ....13. Leprprum (p. 271). 
. Cells 2-seeded; pods broadest 
at the summit, more or 
less truncate. 
Pods more or less winged; 
plants glabrous; coty- 
ledons accumbent..... 14. THuaspI (p. 272). 
Pods wingless; plants with 
branched hairs; coty- 
ledons incumbent. .... 15. Bursa (p. 278). 
Pods of various shapes, never compressed 
nor flattened contrary to the septum. 
Pods flattened parallel to the septum. 
Valves of the pods elastically dehis- 
cent; seeds in one row........... 17. CARDAMINE (p. 276). 
Valves of the pods not elastically dehis- 
cent; seeds in one or two rows. 
Pods short-oblong (in some species 
almost oval), frequently spi- 
rally twisted.........--...----- 18. DraBa (p. 276). 
Pods elongate-linear, never twisted.19. ARABIS (p. 279). 
Pods not flattened nor compressed in any 
direction (sometimes slightly com- 
pressed at the apex in Lesquerella). 
Pods short, globose, ovoid, or short- 
cylindric. 
Valves of the pod nerved; cotyle- 
donsincumbent..............- 30. CAMELINA (p. 288). 
Valves not nerved; cotyledons 
accumbent. 
Pubescence conspicuously stel- 
late; seeds flattened......... 16. LESQUERELLA (p. 274). 
Pubescence not stellate; seeds 
terete ... 0... ee eee eee 24. RapicuLa (p. 283). 
Pods longer, terete or quadrangular. 
Pods conspicuously beaked. 
Pods terete, moniliform (inde- 
hiscent). ........-.....-.-.- 20. RAPHANUS (p. 280). 
Pods quadrangular. 
Beak of the pod flat, swordlike..21. Eruca (p. 281). 
Beak of the pod elongated, 
conic or 4-angled.......... 22. Brassica (p. 281). 
Pods not beaked, or at most only 
tipped by the persistent style 
or stigma. 
