RYDBERG: Rocky MounTaAIN FLORA 433 
This species has been confused with 7: sagittatuim (Nutt.) Endl., 
but differs in the smaller and narrower petals, nearly erect pedicels 
and narrow pod. 
SOUTHERN Uran: 1877, E. Palmer 25 (type in herb. Columbia 
Univ.). 
’ Thelypodium leptosepalum sp. nov. 
Annual or biennial, glabrous throughout ; stem 4-6 dm. high, 
branched ; leaves thin, glabrous, 6-10 cm. long, lyrate-pinnatifid 
with lanceolate divergent lobes; flowering pedicels about 3 mm, 
long ; sepals lance-subulate, 6 mm. long, I-I.5 mm. wide at the 
base, white ; petals narrowly linear-oblanceolate, almost strap- 
shaped, with scarcely any distinction between blade and claw, 8 
mm. long, 0.5 mm. wide or less; filaments filiform, about 1 cm. 
long when well developed; anthers linear, sagittate at the base, 
soon curled. 
This is closely related to 7. daciniatum (Hook.) Endl., but 
differs in the narrow tapering instead of oblong sepals. It grows 
at an altitude of 450-600 m. on rocky banks. 
IpaHo: Lewiston, Nez Perces County, 1896, A. A. & E. Ger- 
trude [feller 3022 (type in herb. Columbia Univ.); Valley of Peter 
Creek, Nez Perces County, 1892, Sandberg, MacDougal & Heller 
122, 
PLEUROPHRAGMA gen. nov. 
Tall glabrous perennials or biennials with paniculate inflores- 
cence and thick entire leaves. Basal leaves oblanceolate or spatu- 
late ; stem-leaves linear-lanceolate, sessile but not clasping. Se- 
pals ascending, thin, more or less petaloid. Petals white or 
purplish with slender claws. Filaments distinct, subulate, white, 
somewhat ‘dilated below and with conspicuous glands at their 
bases ; anthers linear, sagittate at the base, curved. Receptacle 
dilated. Pod slender, terete, torulose, tapering at both ends into a 
short stipe below and a short slender style above ; stigma minute, 
entire ; septum with a strong midrib. 
* Pleurophragma integrifolium (Nutt.) 
Fachypodium integrifolium Nutt.; T. & G. Fl. N. Am. 1: 96. 
1838. 
Thelypodium integrifolium Endl. : Walp. Rep. 1: 172. 1842. 
/ Pleurophragma gracilipes (Robinson) 
Thely podium integrifolium gracilipes Robinson, Syn. Fl. 1' 176. 
1895. 
