iReprimed from the Bulletin of the Torrey Botanical Club, Vol. 24, No. 4, April 24, 1S97.] 



Rarities from Montana.— 1. 



By p. a. Rydberg. 



(Plates 300, 301.) 



Allium fibrosum n. sp. 



Bulb with a fibrous coating ; stem 2-3 dm. high, subterete, 

 somewhat striate; leaves flat, thickish, 3 mm. wide, i-)4 dm. 

 long ; umbel with numerous bulblets and few flowers on pedicels 

 about I cm. long ; perianth-segments lanceolate-oblong, obtuse, 

 6 mm. long ; filaments slightly dilated below, y^ shorter than the 

 segments, and a little longer than the style ; anthers oblong ; ovary 

 evidently 6 crested, with short rounded crests. (Plate 300.) 



This somewhat resembles A. Canadense, from which it is dis- 

 tinguished by the smaller size, the bright red bulblets, and the 

 crests of the ovary. From A. reticulatuni and A. Geycri, it is 

 easily distinguished by the presence of the bulblets. Collected on 

 a high dry mountain side near Lima, Mont, June 29, 1895, by P. 

 A. Rydberg (no. 2606). 

 Allium Sibiricum L. Mant. 562. 1767. {^Allium Schacnoprasiim 



/5L. Sp. PI. 301. 1753. Allium ScJiaenoprasuvi Authors.) 



This has generally been confused with Allium Schaenoprasum, 

 but it is evidently a good species. It is much taller than that 

 plant, being generally 5-6 dm. high, has only one basal leaf and 

 generally several stem-leaves, these thick, about 5 mm. in di- 

 ameter, and broader perianth-segments. Allium Schaetioprasum is 

 only 2-3 dm. high, and its base is surrounded by many narrow 

 leaves. 



In rocky places. Sweet Grass Caflon, Crazy Mountains. (Alt. 

 7000 ft., no 349.) It has also been collected at Deer Lodge, July 

 9, 1895, by myself (no. 2601), 



Calochortus acuminatus n. sp. 



Stem about 2 dm high, with a secondary bulb in the axis of 

 the first leaf; leaves 3-5 cm. long, very narrow and involute from 

 a broader sheathing base ; sepals narrowly lanceolate, scarious-mar- 

 gined, acuminate, equalling, or more often, exceeding the petals ; 

 petals white, rhombic, obovatc or oval, acuminate, hairy at the 

 base around the oval-oblong gland ; filaments a little dilated, espec- 

 ially below ; anthers linear, with slightly sagittate base, tapering a 

 little upward, but not acute ; stigma rather large and thick. (Plate 

 301.) 



