CRUCIFERACEAE (MUSTARD FAMILY) 109 



D. Leaves spatulate; cells of the pod much inflated and appearing like twin 

 pods. PHYSARIA (p. 114) 



DD. Leaves sagittate-clasping; cells of the pod not inflated; pod obovoid. 



CAMELINA (p. 114) 

 BBB. Pods terete. 



E. Pod indehiscent, globose, i-celled, i-2-seeded. E. (Honor of J. A. N. 

 DeNesle, a French botanist.) Neslia paniculata 



EE. Pod dehiscent, oval to cylindric, 2-celled, several to many-seeded. 

 F. Pod oval or obovate; leaves entire to wavy. LESQUERELLA (p. 114) 



FF. Pod oblong; in nearly all species some of the leaves pinnatifid. 



RORIPA (p. 113) 



AA. Flowers not yellow, petals often none. 

 G. Pod indehiscent, orbicular, flattened, i -celled, i -seeded. 



H. Pubescence branched; pod not wing-margined. W. E. (Gk. a = with- 

 out, thysanos = a fringe ; because the pod is not wing-margined.) 



Athysanus pusillus 



HH. Pubescence simple; pod wing- margined. THYSANOCARPUS (p. 115) 

 GG. Pod dehiscent/various in form, often flattened, 2-celled, more than i-seeded. 



I. Pod terete. W. (L. cochlear a spoon; the leaves are somewhat spoon- 

 shaped.) Cochlearia anglica (SPOON CRESS) 



II. Pod flattened parallel to the partition. 

 J. Seeds 4 or more in each cell of the pod. 



K. Flowers solitary, on scapose stems; seed broadly winged. E. (Gk. 

 platys = wide, sperma = a seed.) Platyspermum scapigerum 



KK. Flowers in racemes, often on scapose stems; seed wingless. 



DRABA (p. 115) 



JJ. Seed i in each cell of the pod. W. (L. lobulus a little lobe; probably 

 referring to the 2-lobed hairs. Lobularia maritima (SWEET ALYSSUM) 



III. Pod flattened at right angles to the partition. 



L. Pod lanceolate or oblong-lanceolate. SMELOWSKIA (p. 115) 



LL. Pod shorter for its width. 



M. Valves of the pod obtusely keeled or rounded on the back. 

 N. Pod warty-wrinkled or -tubercled, 2-seeded. CORONOPUS (p. in) 



NN. Pod not as above, many-seeded. 



O. Pod obcordate or triangular-obovate, much flattened, notched at apex. 

 W. E. (Diminutive of L. capsa = a box; referring to the pod.) 



Capsella bursa-pastoris (SHEPHERD'S PURSE) 



OO. Pod ovate or elliptic, not much flattened, not notched at apex. 

 P. Leaves entire, awl-shaped; aquatic; seeds few. W. E. (L. subula = 

 an awl; from the leaves.) Subularia aquatica (WATER AWL WORT) 



PP. Leaves pinnatifid, not awl-shaped; terrestrial; seeds many. W. E. 

 (Honor of a Miss Hutchins, an Irish botanist.) 



Hutchinsia procumbens 



MM. Valves of the pod acute- or wing-keeled. 

 Q. Pod orbicular or obovate; cells i-2-seeded; petals often none. 



LEPIDIUM (p. in) 



QQ. Pod ovate or oblong; cells 2- to several-seeded; petals always present. 



THLASPI (p. in) 



