1902] ROCKY MOUNTAIN PLANTS 371 



grayish on older branches ; lenticels rather few and large ; spines 

 slender, noticeably curved and deflexed, 4-5^™ long, dark brown, 

 the glazed surface marked by the few whitish lenticels: leaves 

 oval to almost orbicular, coarsely and incisely toothed with 

 rather blunt gland-tipped serratures, the rounded or abruptly 

 cuneately-narrowed base merely serrate and scarcely decurrent 

 upon the slender petiole ; pubescence various, sparse and softly 

 strigose on lower surface of leaves (mostly on the veins), 

 minute and appressed on the upper, ciliate on the petioles, the 

 youngest twigs, the pedicels, the calices, and fruits: corymb 

 5--11 flowered: calyx-lobes ovate-lanceolate, with several glands 

 on the margins, 4-5'"°' long: stamens (seemingly) 8-10: pistils 

 3 or 4 : nutlets 3-5, often slightly crested-bisulcate dorsally, 

 about s"""" long: fruit nearly spherical, 8-9"""" in diameter, scar- 

 let-red. 



The Crataegus here described has passed for C macratttha Lodd. 

 ^ While it may be most nearly allied to that it is doubtful if anything referable 



to that species occurs in the Rocky mountains. Another close ally of it is 

 found in C Piperi Britt., from which it differs in pubescence, the absence of 

 glands on the petioles, in the straight styles, the shorter filaments, and the 

 smaller differently colored fruits. 



The type is no. 8673, Sheridan, Wyoming, July 24, iQor ; fully ripe fruits 

 from same locality October, 1902, Sundance, Wyoming, July 2, iSg6, no. 

 2104, seems to be the same. 



University of Wyoming, 



Laramie, 



