\ 
4 Contributions from the Gray Herbarium 
we do not need to “ divide Zygadenus into at least three genera” 
in order to be consistent in our treatment of the Veratreae since 
the other genera of the tribe are distinguishable by much stronger 
characters than exist between typical Zigadenus and the segregate 
genus Anticlea. Finally it may be remarked that nearly, if not all, 
modern botanists whose work is to be taken seriously have failed 
to see any offence to “ consistency,’’ much less to truth, in main- 
taining the genus Zigadenus in the larger sense. 
/ Zigadenus vaginatus (Rydb. a ere nov. Anticlea vaginata 
Rydb., Bull. Torr. Club xxxix. 108 (1912). 
This Utah species is closely related to Z. porrifolius Greene. 
Besides the differences noted by Rydberg, mention should be made _ 
of the nearly white flowers. The statement, “ This differs from the 
other species of Anticlea in its habit of growing in big clumps ”’ is of — 
no value if it is meant that many bulbs grow together in clusters, 
since I have often observed this in Idaho in the case of Z. elegans. 
A specimen from Quebec of Z. chloranthus (Collins, i and 
Pease) illustrates well this habit. 
’ Zigadenus virescens (HBK.), comb. nov. Helonias virescens 
HBK. Sp. i. 267 (1 Z. mexicanus (Kunth) 
ov. Gen. $16). a 
Hemsl. Biol. Cent.-Am. Bot. iii. 382 (1885). Anticlea virescens : 
3). 
(HBK.) Rydb. Bull. Torr. Club xxx. 273 (190 
ZIGADENUS VENENOSUS Wats. Tozxicoscordion arenicola Heller, 
Muhl. ii. 182 (1906), I do not believe can be distinguished from 
Watson’s plant. Z. micranthus Eastw. Bull. Torr. Club xxx. 483 
(1905), however, which Jones, Contrib. W. Bot. xiv. 23 (1912), 
considers the same as Z. Fremontii, var. brevibracteatus Jones 
(which he regards as “‘ an extreme form of elegans’) is, on the cOD- 
trary, most nearly related to the entirely different Z. venenosus 
from which it is amply distinet. And Dr. Hall, in raising Jones’s 
variety of Z. Fremontii to specific rank, Univ. Cal. Publ. Bot. vi. 
165 (1915), has shown that its true relationship is rather with Z. 
paniculatus. 
¥ Zigadenus texensis (Rydb.), comb. nov. Tozicoscordion tex- 
ense Rydb. in Small, Fl. S.E.U.S, 252 (1908). 
This species is closely related to Z. venenosus of the Pacific 
coast. The floral parts are different, however, in shape and size- 
The claws of the perianth segments are unusually fleshy. 



