266 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Pods quadrangular by the thick- 
ening of the midribs of the 
valves. ; 
Plants glabrous; cauline leaves 
clasping.................. 29. CoNRINGIA (p. 288). 
Plants pubescent; cauline 
leaves not clasping ........ 23, CHEIRINIA (p. 281). 
Podsterete or nearly so, the midrib 
wanting or but little thick- 
ened. , 
Petals conspicuously lobed.....28. DryYoPETALON (p. 288). 
Petals not lobed. 
Leaves, at least some of them, 
twice pinnately  dis- 
sected..............005- 27. Soputa (p. 286). 
Leaves not twice pinnate, 
Seeds in two rows......... 24, Rapicu.a (p. 283). 
Seeds in one row. 
Glabrous perennial with 
creeping rootstock. ..25. SCHOENOCRAMBE (p. 285). 
Plants pubescent with 
simple or branched 
hairs (one species 
glabrous annual), 
without rootstocks...26. Sisymprrum (p. 285). 
Selenia dissecta Torr. probably grows in the southeast corner of the State. The 
type locality is in western Texas very near the New Mexican boundary. 
1. THYSANOCARPUS Hook. 
Slender annual with flattened disk-shaped wing-margined 1-celled pods, the wing 
perforated or toothed like a cogwheel. 
1. Thysanocarpus amplectens Greene, Pittonia 3: 87. 1896. 
TYPE Locality: Southwestern New Mexico. Type collected by Greene, April 16, 
1880. 
Rance: Known only from the type locality. 
2. STANLEYA Nutt. 
Stout perennial herbs with entire or pinnatifid leaves; flowers rather large, in elon- 
gated racemes, crowded in bud; calyx narrow, spreading; petals long-clawed, yellow; 
anthers linear or curved, the filaments elongated; silique subterete, elongated, long- 
stipitate. 
KEY TO THE SPECIES. 
Blades of the petals linear-oblong to elliptic; flowers bright yellow.. 1. S. arcuata. 
Blades of the petals rounded-oval; flowers ochroleucous............. 2. S. albescens. 
1. Stanleya arcuata Rydb. Bull. Torrey Club 29: 232. 1902. 
TYPE LocaLity: Unionville Valley, Nevada. 
RANGE: Wyoming and California to northwestern New Mexico. 
New Mexico: Western San Juan County. Dry hills and plains, in the Upper 
Sonoran Zone. 
