Rydberg : RocKV Mountain flora 433 



This species has been confused with T. sagittatuui (Nutt.) Endl., 

 but differs in the smaller and narrower petals, nearly erect pedicels 

 and narrow pod. 



Southern Utah : 1877, ^- P'-'^i^'it-^'' 2j (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 — 1.5 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 i cm. 

 long when well developed ; anthers linear, sagittate at the base, 

 soon curled. 



This is closely related to T. laciniatuui (Hook.) Endl., but 

 differs in the narrow tapering instead of oblong sepals. It grows 

 at an altitude of 450-600 m. on rocky banks. 



Idaho : Lewiston, Nez Perces County, 1896, A. A. & E. Ger- 

 trude Heller J022 (type in herb. Columbia Univ.); Valley of Peter 

 Creek, Nez Perces County, 1892, Sandbcrg, 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.) 

 PacJiypodiniH integrifoliuiii Nutt. ; T. & G. Fl. N. Am. i : 96. 



1838. 

 Thelypodiuui integrifolium Y.\\^\. \ Walp. Rep. i: 172. 1842. 



Pleurophragma gracilipes (Robinson) 

 Thelypodium integrifolium gracilipes Robinson, Syn. Fl. i^ 176. 

 1895. 



