434 RYDBERG: Rocky MouNTAIN FLORA 
Pleurophragma platypodum sp. nov. 
Glabrous perennial with a tap-root ; stem simple up to the in- 
florescence, I—-2 m. igh ; basal leaves spatulate, 5-10 cm. long, 
entire ; stem-leaves 3-6 cm. long, linear-lanceolate or oblanceo- 
late, dark-green, thick; inflorescence paniculate ; racemes dense, 
at first corymbiform, in fruit about 1 dm. long ; sepals oblong, yel- 
lowish- or greenish-white, 4 mm. long ; petals white, clawed, 6-7 
mm. long ; blades spatulate ; pedicels in fruit about 3 mm. long, 
divergent or somewhat reflexed, dilated and flattened at the base, 
pod 1.5-2 cm. long, 1-1.5 mm. thick, torulose; stipe 1-2 mm. 
long ; style short. 
This is related to Pleurophragma integrifolium ( Thelypodium 
integrifolium Endl.), but differs in the shorter inflorescence, the 
shorter pedicels, broadened at the base, the shorter pod with longer 
stipe and shorter style. 
Uran: Moab, 1891, M@ £. Jones (labeled Zhelypodium 
Wright, type in herb, N. Y. Bot. Garden). 
ARIZONA: 1876, £. Palmer. 
To this genus belongs also Zhelypodium lilacinum Greene, Pl. 
Baker. 3: 9. gol, if distinct from 7. integrifolium. The only 
specimens at hand differ from that only in the stronger purple 
color of calyx and corolla. They are without fruit, which, how- 
ever, may furnish distinctive characters. 
HESPERIDANTHUS (B. L. Robinson) Rydb., gen. nov. 
Thelypodium § Hesperidanthus B. L. Robinson, Syn. Fl. 1': 174 
1895. 
Erect, slender, glabrous perennials, with pale foliage ; corym- 
bosely branched above. Basal leaves obovate, toothed ; stem- 
leaves linear, entire. Sepals rather firm, erect - the outer strongly 
saccate at the base. Petals purple, with obovate blades. Anthers 
linear, sagittate at the base, strongly curved. Stigma conical or 
ovate, neither truncate nor 2-lobed. Pod terete, linear, short- 
stipitate. 
Hesperidanthus linearifolius (A. Gray). 
Streptanthus linearifolius A. Gray, Pl. Fendl. 7. 1849. 
Lodanthus or Pachypodium linearifolium A. Gray, Proc. Am. Acad. 
eo Bt IS. 1863, 
_ Thelypodium linearifolium S, Wats. Bot. King’s Expl. 25. 1871: 
