332 Rydberg : Rocky Mountain flora 



mistakably the plant here considered. Being the only available 

 and certain specific name of the plant, sphacelatum is therefore 

 taken up. 



Othake macrolepis sp. nov. 



Annual; stem 3-4 dm. high, strigose-puberulent, and glandular 

 on the upper parts, with ascending branches; leaves alternate, 

 linear, indistinctly 1 -ribbed, strigose-puberulent on both sides, 

 3-5 cm. long, 2-3 mm. wide, short-petioled ; involucres obconic, 

 9-10 mm. high and about as wide; bracts 8-12, in two subequal 

 series, linear-oblanceolate, abruptly acute, scabrous-hispidulous and 

 slightly glandular, green, with scarious tips, and the inner with 

 narrow scarious margins; rays none; disk-corollas rose-purple, 14- 

 15 mm. long; limb 4-5 mm. long, with linear lobes; achenes linear- 

 obpyramidal, 7 mm. long, 1 mm. thick at the apex, strigose-canes- 

 cent, pappus-scales 6-8, lanceolate, caudate-acuminate 5-6 mm. 

 long. 



This species is most closely related to 0. roseum Bush, but has 

 much larger heads, flowers, and fruit, and the leaves have a less 

 distinct midrib. In the type of 0. roseum the disk-corollas are 

 only about 12 mm. long. There is no full-grown fruit in the type 

 sheet, but other specimens show that the achenes are only 4-5 mm. 

 long and their pappus-scales 2-3 mm. long, acute rather than 

 caudate. 



Colorado: Rule Creek, Bent Co., Aug. 17, 1909, G. E. Oster- 

 hout 4097 (type, in herb. N. Y. Bot. Gard.). 



PlCRADENIOPSIS 



In the New Manual, my genus Platyschkuhria is accepted, but 

 Picradeniopsis Rydb., fully as distinct from Bahia, is retained in 

 the latter genus. In Picradeniopsis and Achyro pappus the foliage 

 is impressed-punctate, and the leaves opposite, which is not the 

 case in the other genera included by Gray in Bahia. Bahia is a 

 shrubby plant of South America with white rays. Using Professor 

 Nelson's generic key, Picradeniopsis would key into Hymenoxys. 

 It stands nearest to that genus, which has been known under the 

 name Picradenia, but differs in the free bracts. Picradeniopsis 

 is amply distinct from the non-punctate and alternate-leaved 

 Bahia but may have been included in Achyro pap pus. The annual 

 habit and ray less heads of that genus seem to be distinction enough. 



