221 
{7, Descurainia.e Webb and Berth, Tansy Mustard, 
Annual or biennial herbs with erect branching stems, pubescent with 
forked or branches usairs, Leaves alternate, fern-like, pinnate or pinnati- 
fid, Flowers yeliow, terminally crowded in racemes, Sepals subequal, soon 
Co 
deciduous. Sitiques linear, columnar, slender,with l-veined valves, Seeds 
in 1-2 rows in each chamber, 
o Leaves once or twice pinnate or pinnatifid; herbage green 
alr a 1-1,.5 cm. long on pedicels about 1 cm. long 1. D. incisa 
Ce . 
« Stttiques 8-10 mm, long on pedicels about 1.5 om, : 
> long Ze De longipedicellata 
f Leaves twice or thrice pinnatifid, dissected into numerous 
.j Small segments; herbage ashy-green 
& Siliques 2-2.5 cm, long Se De. Sophia 
~ Pode 
Sttiqups 6-8 mm, long 4 D,. canescens 
1. D. incisa (Engelm,) Britt, Biennial, 1-1.5 ms tall, stem erect, the 
branches ascending, 50-50 cm. long, all minutely stellate-puberulents; lower 
leaves sessile, 15-18 cm, long, pinnate, the lobes 7-9, oblong or lanceolate, 
2-4 cm, long, obtuse, about 6-10 mme wide, pinnately toothed or lobed, mostly 
tar ele [thom Rar brrcrrd 
sessile, the upper decurrent, all sparin y stebtete; reehts-steliase, sepals 
oblong, 2 mm, long, yellowish; petals spatulate, 3 mm, long, pinnately veined, 
yellow; mature pedicels about 1 cm. long, spreading; pods 1-1.5 cm, long, 
ascending, 1-1,5 mm, broad, somewhat torulose, the valves l-veined; seeds 
uniseriate, oval, 1.5 mm, long, (De Richardsonii subsp. incisa Detling). 
Along the trail, Fish Lake Cr., 5000 ft., Epling & Houck 9460. 
