108 Rydberg: Studies on the Rocky Mountain flora 



Under the second species is given the following synonym and 

 remark: "(7". scopiilorum 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. scopiilorum* 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. hracteata Small, the type of which was from the Blagk Hills. 



MELANTHACEAE 



Tofieldia occidentalis S. Wats, has been collected in Idaho; T. 

 coccinea Richards, in the Canadian Rockies; Stenanthella occi- 

 dentalis and Veratruni EschscJwltzianum in Montana and Idaho. 



To me both Zygadentis d-ilatatus 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. 



