Rydberg: Studies on the Rocky Mountain Flora 270 



enb., or Habcnaria clcgaiis Jackson, of a much later date. The 

 genus that I shortly characterized under the name of Montolivaci 

 in the Memoir cited above, is therefore without a name. As I 

 find that no genus has at yet been dedicated to Professor Piper, I 

 take the pleasure in naming this for him. The genus contains at 

 least three species, viz. 



Piperia elegans (Lindl.) 

 PlatantJicra elegans Lindi. Gen. & Sp. Orch. 285. 1835. 

 Hahenaria elegajis Boland.; Wats. Bot. Calif 2: 133. 1876. 

 Moiitolivaea elegans Rydb. Mem. N. Y. Bot. Gard. i : 106. 

 1900. Not Reichenb. 



Piperia Unalaschensis (Spreng.) 



Spirantlies Unalascheitsis Spreng. Syst. 3: 708. 1826. 



Habenaria Unalaschensis Wats. Proc. Am. Acad. 12 : 277. 

 1876. 



Montolivaea UnalascJiensis Rydb. Mem. N. Y. Bot. Gard. i : 

 107. 1900. 



Piperia elongata sp. nov. 



A slender strict plant, 4-7 dm. high. Corm ellipsoid, about 2 

 cm. long and i cm. in diameter : leaves 2, near the base ; blades 

 lanceolate or oblanceolate, acute, 8-15 cm. long, 1-2 cm. wide: 

 spike elongated and lax, 2-3 dm. long : flowers about i cm. long : 

 sepals green, about 5 mm. long, the upper lanceolate, the other 

 two linear obtuse : petals lanceolate, oblique, equalling the sepals : 

 lip entire, broadly lanceolate : spur slender, scarcely clavate, almost 

 cylindrical, arcuate, 10-12 mm. long, about .7 mm. thick. 



This is somewhat intermediate between the two preceding. 

 It has almost the same flowers as the first and the general habit of 

 the second. P. elegans, with which it has generally been con- 

 fused, has a stouter, more fleshy stem, thicker bracts and a short 

 crowded spike. P. Unalaschensis has the same habit as the present 

 species, but the spur is very short and saccate. P. elongata grows 

 in open woods, up to an altitude of 700 m. 



Idaho : Priest Lake, near lower end, 1900, D. T. MacDongal, 

 168 (type); Priest River Valley, ij^. 



Washington : W. Klickitat County, 1885, W. N. Snksdorf ; 

 Seattle, 1889, C. V. Piper, loSi. 



