108 RypBERG: STUDIES ON THE Rocky MOUNTAIN FLORA 
Under the second species is given the following synonym and 
remark: ‘“(T. scopulorum Rose, Contr. U. S. Nat. Herb. 5: 205. 
1899, as to the specimens from Colorado and northward).”’ This 
would have been correct if the word “‘ mainly’ had been inserted, 
for I have seen at least one specimen from Colorado that I refer 
without hesitation to T. scopulorum.* The latter differs from the 
other species of the region by its glabrous or nearly glabrous sepals, 
its smaller petals, only 10 mm. long, and its subglobose capsule. 
There is also another species, which should have been included, 
viz., T. bracteata Small, the type of which was from the Black Hills. 
MELANTHACEAE 
Tofieldia occidentalis S. Wats. has been collected in Idaho; T. 
coccinea Richards. in the Canadian Rockies; Stenanthella occi- 
dentalis and Veratrum Eschscholtzianum in Montana and Idaho. 
To me both Zygadenus dilatatus Greene and Z. alpinus Blankin- 
ship seem to be but synonyms of Z. elegans Pursh or Anticlea ele- 
gans Rydb. Anticlea porrifolia (Greene) Rydberg (Zygadenus porri- 
folius Greene) was collected last summer in southeastern Utah. So 
also an undescribed species: 
’ Anticlea vaginata sp. nov. 
Perennial, growing in big clumps; cormlike rootstock fully 2 cm. 
thick; stem 7-10 dm. high, at the base covered with numerous 
scarious sheaths; leaf blades linear, 3-7 dm. long, 6-10 mm. wide, 
with numerous veins; inflorescence paniculate, branched; lower 
bracts linear or subulate, 3-6 cm. long, green, the upper ones ovate, 
5-10 mm. long, white; pedicels 5-10 mm. long, often recurved; 
petals and sepals white, elliptic, obtuse, 7-8 mm. long, usually 
7-nerved, the former sometimes a little longer than the latter; 
filaments linear-subulate, broad at the base, white, slightly 
shorter than the sepals; anthers nearly round; styles slightly 
exceeding the perianth, curved. 
This differs from the other species of Anticlea in its habit of 
growing in big clumps, and in its numerous loose sheaths at the base 
of the stem. In the perianth segments it resembles A. colora- 
densis,and A. porrifolia in the few veins, the segments are smaller 
than in the former and broader than in the latter. It resembles 
* Garrett and myself collected it also in southeastern Utah last summer. 
