ne Ag le, ety sat 
ambi ( Nutt.) oe, C. R. 
on pyprds with stout 
“vertical roots which are usually tuberous and turnip sha » sometimes havi 
tuberous swellings, the stems 15-60 om. tall, glabrous; leaves 
few, 5-20 cm. long, once or twice ternate or apparently pinnate, the ultimate * 
segnents linear or linear-oblanceolate, obtuse, narrowed toward the 
base, commonly 
1-5 mm. wide, quite variable in length, the petioles mostly dilated and mem- 
branous; flowers yellow, dmgiegeet in compound umbels the rays of which are 
unequal, 1-10 cm. long, rather widely spreading, naked or sometimes subtende 
by a subfoliar bract, the mature pedicels mostly 8-10 m. long, 
oblong, 8-12 mm. long, 2-2.5 mm. wide, the wing scarcely .5 mm. 
dorsal ribs scarcely elevated, the intervals brown; 
intervals, 2 very broad ones on thse commissural face 
ng 
ve 
d 
naked; fruits 
wide, the 
oil tubes solitary in the 
Dry gravelly banks of streams or lakes at low elevations, 
