CATALOGUE. 271 



Zygadenus glaucus, Nutt. — Colorado (950). Also from the Mogollon 

 Mesa of Arizona a form corresponding well with the description and with 

 other specimens, save in the shape of the gland, which extends across the 

 lobes of the perianth, but has sometimes no upward heart-shaped divisions 

 whatever (103), Loew. The shape of the gland, I am convinced, is quite 

 too inconstant to serve as a specific test. A specimen from Anticosti Island 

 has exactly the gland of Z. Fremontii, Torr., and yet is in all other respects 

 a good Z. glaiicus. 



Zygadenus elegans, Pursh (Fl. N. Am. vol. 1, p. 241). — 1-2° high, 

 slender, upper leaves few, one or two somewhat elongated but not exceed- 

 ing the stem ; lower leaves narrow (4-6" wide), equal to or exceeding the 

 stem; pedicels in the developed flower 8-12" long, slender, exceeding the 

 narrowly lanceolate, thin, veined bracts; flowers "white" or yellowish- 

 white, 8-10" in diameter; divisions of perianth oblong, obtuse, longer than 

 the stamens ; racemes often paniculate at base ; oblong ovules in two rows, 

 20-25 in each cell. In my specimens of this species, the glands are usually 

 deeply and obtusely two-lobed, with the lobes entire and the veins indis- 

 tinctly seen. In a specimen of Z. cliloranthus, Rich, (for which species I at 

 first took this), from Fort Yukon, Alaska, the glands are less deeply lobed, 

 with the lobes truncate and distinctly toothed, and the veins quite plainly 

 seen. Not only do these shapes and divisions differ in the same species, 

 but often markedly in the same flower. 



By Pursh, the flower is said to be white, the petals acute, and the 

 gland cinnabar-colored, in which points my specimens certainly do not agree 

 with the description Mr. Watson, on comparing this with the plants in the 

 Cambridge herbarium, names it as above ; and I do not hesitate to accept 

 his determination — Mogollon Mesa, Arizona, Loew (103); Willow Spring, 

 Arizona, at 7,195 feet elevation (213). 



Zygadenus Nuttallii, Gray. — Apex, Colorado (944). 



era our eastern V. viride, Ait., as differing frcm V. album, L., " oDly in the green herbaceous perianth, 

 the segments perhaps rather less attenuate at lase, the panicle more open and with longer branches." 

 The Oregon form (probably the same with which Dniand contrasted his V. Californicum in Plant. Prot- 

 ten. Calif, p. 101) Mr. Watson decides to be V. Kseksehollzii, Gray. 



Comparing the specimen (305) from Mount Graham with an eastern V. viride, Ait., I find the lat- 

 ter to have much longer (relatively) and more delicate filaments, and the unopened anthers to b.< just 

 a little retuse at the apex, giving them, when fully opened, the appearance of a slightly four-lobed disk. 



