7 o ORCHIDACEAE. 



Ophrys convallarioides (Sw.) W. F. Wight. Similar to 0. caurina but 

 ool bo tall; leaves broad, oval or ovate, obtuse; inflorescence glandular; 

 Bowers larger, the pedicels scarcely longer than the bracts or the ovary; lip 

 large, 9 mm. long, cuneate, retuse, with a short triangular tooth on each side 

 mar the base. In deep moist woods. 



97. LIMNORCHIS. 



I eafy plants with thick fleshy roots, or elongated conic un- 

 divided tubers, and small greenish or whitish flowers in a long 

 >pike; sepals and petals free and spreading, several-nerved; lip 

 entire; beak of the stigma without appendages; anther-cells 

 Dearly parallel, wholly adnate; gland naked; pollinia granular 

 with caudicula at the base. 



Flowers white. L. leucostachys. 



Flowers green or purple-tinged. 



Spur clavatc, much shorter than the lip; spike long and 



loose. L. stricta. 



Spur not clavate, about as long as the lip; spike short and 



dense. L. viridiflora. 



Limnorchis leucostachys (Lindl.) Rydb. Stem strictly erect, 30-90 cm. 

 high from a fusiform tuber; leaves lanceolate, acute, the upper ones smaller; 

 spike 6-30 cm. long, usually rather dense; bracts acuminate, equalling or 

 exceeding the ovary; sepals 5-6 mm. long, the upper one broader; lip lanceolate, 

 6-7 mm. long; spur 10-12 mm. long, slender, acute. In wet places, especially 

 in the mountains. 



Limnorchis leucostachys robusta Rydb. Spike dense; spur obtuse. More 

 common than the species and in similar places. 



Limnorchis stricta (Lindl.) Rydb. Stems stout, leafy, 50-100 cm. tall; 

 leaves lanceolate, acuminate, 10-15 cm. long, gradually diminishing upward 

 into the bracts; spike slender, 20-30 cm. long, loose, the lower flowers remote; 

 bracts narrowly lanceolate, exceeding the lower flowers, equalling the upper 

 ones; sepals 3-nerved; lip linear, thick, as long as the spur, which is inflated 

 and very obtuse at the tip. Springy places in the foothills. 



Limnorchis viridiflora (Cham.) Rydb. Stems 20-40 cm. high from fusi- 

 form tubers; basal leaves oblanceolate, obtuse, the upper lanceolate, acute; 

 downs pal,' green, 10-12 mm. long; upper sepal ovate, broader than the 

 spreading lanceolate lateral ones; lip lanceolate, obtuse, 4-5 mm. long, equalling 

 tin- clavate spur. Spokane County, Suksdorf. 



98. PIPERIA. 



Much like Limnorchis in the form of the flowers but the true 

 leaves basal or nearly so, the cauline usually small or bract-like; 

 tl<.\vcr> small, white or greenish; sepals ovate, 1-nerved, sub- 

 equal; petals and lip of very much the same shape and slightly 

 smaller and darker than the sepals; column very short; anther 

 very large; cells parallel, the gland very small. 



J' 1 "*' rush; spur short. P. unalaschensis. 



whin-; spur long. P. elegans. 



