Rydberg : Rocky Mountain flora 637 



prickles united > ' their length into a distinct wing, the alter- 

 nate oiks usually much smaller; back slightly keeled, without 

 prickles, minutely hispidulous or glabrous. 



In habit this species also resembles L. fioribunda, but is dis- 

 tinguished by the narrow leaves and the united marginal prickles 

 of the fruit. These characters would place it near /.. scaberrima, 

 which, however, has a different pubescence. 



South Dakota: Oreville, 1902, Rydberg 891 (type). 



Colorado: La Veta, 1896, Shear 3640. 



Oreocarya argentea sp. no v. 



Cespitose perennial ; stems 3-4 dm. high, hispid ; basal leaves 

 spatulate or oblanceolate, obtuse, 5-6 cm. long, densely white- or 

 yellowish-pubescent, partly with stiff bristle-like hairs, partly with 

 fine hairs, but all strictly appressed ; stem-leaves oblanceolate, 

 with the bristles more spreading ; inflorescence narrow and virgate ; 

 calyx in fruit S-10 mm. long, hispid ; its lobes linear-lance- 

 olate ; corolla white, less than 5 mm. long ; its tube included and 

 limb 5-6 mm. wide; nutlets about 3.5 mm. long, papillose and 

 with more or less distinct cross-ridges. 



This species is perhaps nearest related to 0. scricea, which, 

 however, is a much smaller plant and has mammillate-papillose 

 nutlets without cross-ridges. It grows on dry hills in Colorado. 



Colorado: Rifle, Garfield County, 1900, Osterhout 2122. 



Oreocarya eulophus sp. nov. 



More or less cespitose perennial ; stem about 2 dm. high, 

 hispid with yellowish hairs ; basal leaves numerous, spatulate, 4-5 

 cm. long, finely cinereous and appressed hispid ; stem-leaves 

 oblanceolate, with the hispid hairs more spreading and often 

 yellowish ; inflorescence a narrow and almost spikelike thyrsus ; 

 calyx in fruit about 7 mm. long, yellowish hispid ; its lobes lance- 

 olate ; corolla white, 10-12 mm. long; tube exserted from the 

 calyx; limb about 5 mm. wide; nutlets 4-5 mm. long, with 

 irregular honeycomb-like crests. 



This species is a near relative of 0. fulvocaiiescens and O. 

 eristata, but easily distinguished in fruit by its nutlets. It grows 

 on gravelly hills at an altitude of 1800-2300 m. 



Colorado: Dolores, 1892, Cranda'l (type) ; McCoy's, 1903, 

 Osterhout 2750. 



Utah: Price, 1900, Sto/ccs. 



