Cruciferae 485 



Pods more or less pubescent. 



Beaks of pods more than 1 mm long 3015. Berteroa, p. 509. 



Beaks of pods less than 1 mm long. 



Seed 1 in each cell. (See excluded species no. 275, p. 1054.) 



3013. Lobularia, p. 509. 



Seed more than 1 in each cell. (See excluded species no. 272, p. 1053.) 



2989. Draba, p. 502. 



Pods flattened at right angles to the narrow septum. 



Seed 1 in each cell; pods dehiscent 2883. Lepidium, p. 487. 



Seed more than 1 in each cell; if only 1-seeded the pod indehiscent. 



Styles very short, less than 0.5 mm long; pods very flat, thin, orbicular 

 to obovate-orbicular, winged. 

 Plants stellate-pubescent; pods orbicular, not more than 4 mm wide, not 



strongly notched at the apex 3006. Alyssum, p. 509. 



Plants glabrate; leaves mostly basal, pinnatifid or incised; pods wing- 

 less, cuneate to triangular obcordate 2986. Capsella, p. 502. 



Plants glabrous; leaves not mostly basal, entire or dentate; pods winged, 



nearly orbicular to obovate-orbicular 2903. Thlaspi, p. 488. 



Styles more than 0.5 mm long; pods somewhat flattened but not thin. 

 Pods indehiscent, globose, 2.5 mm in diameter, surface conspicuously 

 reticulate, generally 1-seeded; plants very pubescent. (See ex- 

 cluded species no. 271, p. 1053.) 2988. Neslia, p. 502. 



Pods dehiscent and not as above. 



Pods globose, about 2 mm in diameter, about 4-seeded; plants finely 



stellate-pubescent 2983. Lesquerella, p. 502. 



Pods obovoid, about 4-6 mm in diameter, many-seeded; plants 



glabrous, at least above 2987. Camelina, p. 502. 



B. Pods 4-many times as long as wide. 



Pods indehiscent, moniliform, up to 6-8 mm in diameter, 2- or 3-seeded, walls 



spongy; flowers purplish 2950. Raphanus, p. 492. 



Pods not as above. 



Beaks of pods generally 5-10 mm long; radical leaves ternate, or palmately 



divided; stem leaves generally 2 or 3, mostly 2-5-parted 



2967. Dentaria, p. 500. 



Beaks of pods less than 5 mm long; leaves not as above. 

 Plants stellate-pubescent, small; leaves small, simple, not clasping at 



the base; seeds in 2 rows in each cell 2989. Draba, p. 502. 



Plants not as above. 



Seed in 2 rows in each cell. 



Plants aquatic; seeds not winged 2965A. Nasturtium, p. 496. 



Plants not aquatic; seeds winged in nos. 1 and 7 and excluded species 



no. 273, p. 1053, of 3001. Arabis, p. 504. 



Seed in 1 row in each cell. 



Seeds more than 3 mm long; leaves all simple, dentate but pinnatifid, 



the larger ones usually 8-13 cm long; pubescence branched; petals 



generally purplish, sometimes whitish, mostly 1.5-2 cm long; 



pods up to 12 cm long, widely spreading, contracted between the 



seed when mature 3041. Hesperis, p. 510. 



Seeds less than 3 mm long; petals less than 1.5 cm long. 



Plants glabrous; upper stem leaves simple, dentate; lower stem 

 leaves more or less pinnatifid at the base, clasping; petals 

 purplish, 6-9 mm long; pods 1.5-3 cm long, terete, widely 



spreading 2963. Iodanthus, p. 494. 



Plants not as above. 



Seeds broadly or narrowly winged. 



Seeds broadly winged; stems glabrous or nearly so; pods re- 

 curved-spreading or pendulous, 7-10 cm long in nos. 5 and 9 

 of 3001. Arabis, p. 504. 



