LiMNORCHIS AND PiPERIA NORTH OF MeXICO 



625 



Fir.. 15. 



Stem stout and leafy, 4-6 dm. high : tubers elongated fusi- 

 form, 6-7 mm. in diameter : leaves lanceolate to linear-lanceo- 

 late, 1-2 dm. long, 1.5-3 cm. wide, 

 acute : spike long and dense ; bracts 

 linear-lanceolate, attenuate, about 

 equalling the flowers : these dull 

 white, 16-20 mm. long: upper 

 sepal ovate, obtusish ; the lateral 

 ones lanceolate, acute : petals lan- 

 ceolate, about equalling the sepals ; 

 lip 7-8 mm. long, lanceolate, ob- 

 tuse, the dilated portion ovate ; spur 

 filiform, curved, about -,< longer than 

 the lip. 



This has been merged into A. Icucostachys, which it resembles 

 in habit, but the spike is denser, the flowers are dull or greenish 

 white, and the form of the lip is different. 



Type : " Arizona, Thurber (925)." 



New Mexico: 1851-52, C. Wright, igoo. 



California: Thouias Bridges, ^56 ; Mammoth, 1891, Covillc & 

 Funston, 1822 ; Miner's Ditch, Nevada county, 1867, N. J.Davis, 

 J 7 ,• Canoe Creek, /. .S". Newberry; Nevada, 1893, Michcner & 

 Bioletti ; Sisson, 1897, H. E. Brown, j^ 20 ; Marin county, 1873, 

 Edtvards; Bernardino Mts., 1882, S. B. & W. F. Parish, ij2i ; 

 Fresno county, 1900, Hall & Chandler, ijO. 



16. LiMNORCHIS LEUCOSTACHYS (Lindl.) Rydb. Mem. N. Y. Bot. 



Garden, i : 106. 1900. 



Platanthera leiicostachys Lindl. Gen. & Sp. Orchid. PI. 288; 

 Habenaria leiicostachys S. Wats. Bot. Cal. 2: 134. 1880; Pla- 

 tanthera hypcrborea o var. leiicostachys Kraenzlin, Orch. Gen. et 

 Sp. 640, in part. 1899. 



Stem stout and tall, 6-10 dm. high: lower leaves oblanceo- 

 late, 1-2 dm. long, 1.5-3 cm. wide; the upper lanceolate, acute: 

 spike 1-3 dm. long, rarely very dense ; bracts linear-lanceolate, the 

 lower exceeding the flower : these purely white, i 5-20 mm. long : 

 upper sepal ovate, obtuse, about 5 mm. long ; lateral ones lanceo- 

 late, acute, j-^ mm. long : petals lanceolate, attenuate, a little 

 shorter than the upper sepal; lip lanceolate with a decidedly 

 rhombic base, about 8 mm. long ; spur filiform, scarcely clavate, 



