402 Rvdberg : Rocky Mountain flora 



scapes, 2-4 mm. wide ; sheaths very broad, loose and scarious ; 

 scapes a little over 2 dm. high, stout, 3-4 mm. thick, often 2 or 3 

 from the same set of sheaths : umbel many-flowered ; bracts 

 usually 3, ovate-lanceolate, acuminate, about 2 cm. long, veined 

 with purple ; pedicels stout, about 2 cm. long ; the outer in fruit 

 spreading or reflexed ; petals and sepals lanceolate, long-attenu- 

 ate, fully 1 cm. long, white, scarious, with a prominent purple mid- 

 vein : capsule 5-6 mm. long, with 6 conspicuous oblong crests 

 which are over 1.5 mm. high. 



This species is perhaps most nearly related to A. Geyeri, but 

 stouter, usually with 2 or 3 scapes, loose sheaths, longer and more 

 attenuate petals and sepals, larger conspicuous crests, and longer 

 bulb with very fibrous coat. 



Colorado: May 14, 1898, C. S. Crandall. 



Allium Pikeanum sp. nov. 



Bulb obliquely ovoid, about 1.5 cm. long and 8-10 cm. thick ; 

 coat membranous except the outer layer, which is fibrous -reticu- 

 lated ; scape 8-15 cm. long, almost equaled by the narrowly lin- 

 ear leaves : bracts usually 3, lanceolate, 8-10 mm. long and very 

 soon reflexed; umbels with 10-15 flowers, but no bulblets ; 

 pedicels about 1 cm. long ; petals and sepals subequal, ovate, acu- 

 minate, red-purple ; filaments subulate, dilated below, about three- 

 fourths as long as the petals ; capsule slightly crested above. 



This is most nearly related to A. reticulatum and A. Geyeri, but 

 distinguished by the small reflexed bracts, the dark flowers and the 

 small bulb with only the outermost layers of the coat fibrous. It 

 grows in the higher mountains of the Pike's Peak region at an 

 altitude of 3,000-3,800 m., while the other species mentioned be- 

 long to the plains. 



Colorado: Halfway House, 1896, C. L. Shear, 3721 (type); 

 South of Pike's Peak and Bald Mountain, 1895 and 1896, E. A. 

 Besscy ; Peak Valley, 1901, Clements, +26. 



Corallorrhiza ochroleuca sp. nov. 



Whole plant light yellow ; stem 2-4 dm. high, not bulbous- 

 thickened at the base ; sheaths loose and rounded and mucronate 

 at the apex ; raceme 10- 1 5 -flowered ; flowers 15-20 mm. long, 

 light yellow, unspotted ; petals and sepals 7-8 mm. long, oblong- 

 lanceolate, acute, with prominent midvein ; lip ovate, sinuate but 

 neither lobed nor toothed ; spur small and adnate to the ovary. 



In general habit, this resembles a large C. multiflora, but dif- 



