1. He dilatata (Pursh) Hook. White Bog Orchid, Stems commonly 40-80 
em, tall; leaves sheathing at the base, blades 10-20 em, long, .0-2 cm, 
broad, linear, tapering, acute, diminishing upwards; flowers mostly many, 
rather dense in a raceme or spike, bracts narrowly lanceolate or oblong, 
erect, subequal to the tlowers; perianth commonly white, often but not 
always delicately fragrant, the segments 4-6 mm, long, the petals half 
again as broad as the sepals; lip 6 mm, long, lanceolate, dilated et the 
base and narrower along the middle, spur subequal to the lip or shorter, 
even, not dilated, curving; capsule 13-14 mm, long, cylindrical, 
sessile, (Limmorchis dilatata Kydb.), 
Bogs, meadows and river bottoms, 2500-6000 ft, 
var. leucostachys (Lindl.) Ames. Similar in asnect, the flowers somewhat 
larger, spur relatively stouter, half again as long as the lip (9-10 m.), 
(He leucostachys ‘ats.; Limnorchis leucostachys Rydb.),.—Similar habitats 
with us. 
2e He saccata Greene. Green Uog-Orchid. Stems commonly 60-80 mn, tall, 
lesves sheathing or merely clasping, 5-20 cm. long, 1-3 cm, wide, oblong 
or oblong-lanceolave, the lowermost obtuse, frequently very blunt, becoming 
acute above, passing into the slender very acute bracts; racemose, rarely 
spicate, bracts often longer than the flowers, the lowermost twice their 
length, spreading; perianth greenish, the segments 3-5 mm, long, the petals 
twice as broad as the sepals, the rear one broadly ovate, obtuse, truncate 
at the base, the liv 5 mm, long, narrowly oblong, even throughout or but 
little broader at the base, thickish, the spur shorter, distinctly 
dilated and sac-like at the bases; capsule 10 mm, long, cylindrical, sessile. 
(Limorchis stricta Kydb.), 
Bogs, seepage spots and stream banks 2700-5000 ft.3; most common speciese 
