MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 205 



Montana: Helena, 1890, F. D. Kchcy ; Sheridan, 1892, // 

 M. Fitch. 



ROSACEAE. 



* Opulaster pubescens. 



A shrub about i m. high with strict branches and light-colored 

 shreddy bark ; young branches, leaves and inflorescence pubescent 

 with branched or stellate hairs ; leaves orbicular with cordate base, 

 slightly 5-lobed and doubly crenate, about 2 cm. long and 2-2.5 cm. 

 in diameter ; hypanthium and sepals densely stellate-tomentose, the 

 latter ovate, obtuse ; petals broadly obovate, about one-third longer 

 than the sepals ; ovaries densely stellate-tomentose, united to above 

 the middle ; carpels not much inflated, the apex straight or perhaps 

 somewhat spreading in fruit. 



In habit intermediate between O. /noiwgynns and 0.;paiic(/forHS, hut 

 differs from both in the hairy and duller leaves and the obtuse sepals. 

 The form of the carpels is intermediate, although more like the lat- 

 ter ; the apex is straight and somewhat flattened laterally, but not 

 so much as in those of O. panc/^orus ; they are perhaps also more 

 turgid than in that species. It grows at an altitude of 1500-2000 m. 



Montana: Hound Creek, 1883, Scribner, jj (fruit, in Canby 

 herbarium). 



Utah: Ogden, 1871, T. C. Porter (flowers, Columbia College). 



Wyoming: Hartville, 1894, A. JVelson, ^gS (?) (this specimen 

 seems to belong here, but carpels more divergent than in the types). 



* Opulaster pauciflorus (Nutt.) Heller, Bull. Torr. Bot. Club, 25: 



581 ; Spiraea faticifora Nutt. ; Torr. cS: Gra3S Fl. N. Am. i : 414 ; 



Neillia malvacea Greene, Piltonia, 2 : 30 ; Opulaster malvaceus 



Kuntze, Rev. Gen. PI. 949. 



In the form and size of the leaves this species is most like O. opttli- 

 folius but the fruit distinguishes it readily from that species and from O 

 monogxmis. The carpels are united to above the middle, are 

 little inflated, and the upper portion is more or less laterally flattened 

 and forms an erect beak. They are not, as described by Prof. 

 Greene, indehiscent, but open very tcU'dily ; they are also much 

 smaller than those of the other species. Nuttall's type is in the 

 Columbia herbarium and belongs evidently to the same species as 

 Prof. Greene's Neillia malvacea. O. pauciflorus is a native of the 

 mountain regions of Washington, Oregon, northern Idaho and 

 western Montana. 



