240 BOTANY. 



heads in long - , drooping racemes, 3-5. Styles long; "stigmas at first of 

 a deep and bright brown." — Arizona. 



SALICACE.E. 



Salix* amygdaloides, Anders. (Sal. Bor.-Amer.) (S. nigra, Marsh, var. 

 amygdaloides, Anders. DC. Prod. 16, 2, 201.) — Leaves broadly lanceolate, 

 3-6' long, ^-iy wide, with a long tapering point, glaucous beneath, closely 

 serrate, petioles long and slender, stipules minute and very early deciduous: 

 aments leafy -peduncled, elongated-cylindrical, pendulous; the fertile when 

 in fruit lax, 3-4' long, V thick; scales in the male ament ovate, villous with 

 crisp hairs, in the female narrower, somewhat smooth, fugacious: capsules 

 globose-conical, glabrous, long-pedicelled ; style very short or obsolete, 

 stigmas notched. Denver, Colorado (823). From Utah to Missouri ; fre- 

 quent along the Platte ; northward to Eed River and eastward to the shores 

 of Lake Erie. In aspect very unlike S. nigra, and in fact more frequently 

 mistaken for S. hicida. The broad leaves, being supported by long and 

 slender petioles, are moved by the slightest breeze, displaying in rapid, 

 fluttering succession their conspicuous white under surfaces, thus producing 

 an effect in striking contrast with the changeless, soft light reflected from 

 masses of the foliage of S. nigra when swayed gently by the wind. 



Salix longifolia, Muhl. — Santa Fd, N. Mex., Denver, Colo., June 

 (822). 



Salix rostrata, Richards. ($ livida, Wahl., var. occidentalis, Gray. 

 S. vagans, var. rostrata, Anders.) — South Park (821); Georgetown (number 

 826 in part); Arizona. 



Salix No\\e Anglic, Anders., var. pseudo-cordata, Anders. (Sal. 

 Monogr. 161, and DC. Prod. 16, 2, 253). — Leaves oblong-lanceolate, acute 

 or acuminate, the earliest obovate-oblong and somewhat obtuse, closely 

 and slightly serrulate or crenate, bright green and glabrous on both sides, 

 reticulate-veined, the young drying black, stipules on vigorous shoots large, 

 semicordate, on twigs and flowering branches small or none ; aments short, 

 oblong-cylindrical, about 1' long, densely flowered, at first wrapped in the 



* For the elaboration of this genus I am indebted to Mr. M. S. Bebb, who, more than any other 

 American, is placing our knowledge of this most difficult group on a satisfactory basis. 



