ORCHIS FAMILY 179 



6, LYSIELLA Rydb. 



Small herbs, with rootstocks. Stem acapiform, with a single obovate leaf at 

 the base. Flowers greenish yellow. Upper sepal round-ovate, erect, surround- 

 mg the broad column; lateral sepals reflexed-spreading. Petals lanceolate, 

 smaller; lip entire, linear-lanceolate, deflexed. Spur slightly curved, shorter 

 than the ovary. Anther-sacs divergent, wholly adnate, arcuate; glands small, 

 their faces incurved. Pod obovoid. 



1. L. obtusata (Pursh) Rydb. Stem slender, 1-2.5 dm. high, glabrous; 

 leaf a-12 cm. long; spike 2-6 cm. long, loosely floAvered; flowers about 1 cm. long- 

 spur longer than the lip, slender, straight. Habenaria obtusata Richards. Boggy 

 places m the woods: Newf.— X.Y.— Colo.-'Alaska. Mont.—Subalp. Je-Au. 



7. LIMNORCHIS Rydb. Bog Orchid. 



Leafy-stemmed plants, with elongated fusiform root-like tubers and fleshy- 

 fibrous roots. Flowers whitish or greenish or tinged with purple. Upper 

 sepal ovate to almost orbicular, erect, 3-7-nerved; lateral' sepals from linear to 

 ovate-lanceolate, free from the lip, 3-nerved, seldom 4-5-nerved, spreading or 

 often somewhat reflexed. Lateral petals erect, lanceolate, 3-nerved, oblique at 

 the base. Lip entire, flat or slightly concave, reflexed, free, from linear to 



rhombic-lanceolate, obtuse. Column short and thick. Anther-«acs parallel, 

 opening in front. 



Lip more or less lanceolate, i. e,, broad near the base. 



Flowers greenish or pin-plish; lip not rhombic at the base. 



Spur decidedly clavate. thickened and obtuse at the apex, shorter than the hp 

 Petals purplish; spur only one-half to two-thirds the length of the Up. very 



saccate. 



Lip linear or nearly so, 5-7 mm. long; ovary slightly curved; spike usually 



elongated. 1. j^^ stricta 



Lip lanceolate, fleshy, 4-5 mm. long; ovary strongly curved; spike usually 

 short. _ , 2. L. purpurascens. 



Petals greenish; spin' almost equamng the lip. 3. L. viridiflora. 



Spur slender scarcely thickened at all towards the apex, often acutish, equal- 

 hng or slightly exceeding the lip; plant tall and stout; flowers comparatively 

 large; sepals 4-6 mm. long. 4 j, media 



Flowers white or nearly so; lip lanceolate, decidedly dilated, subrhombic at the base. 

 Spur only slightly if at all exceeding the lip. 



Spur usually shorter than the Up and clavate. 6. L. borealis. 



Spur eaualling or slightly exceediag the Up. sUghtly or not at all clavate. 



, . ,. Spur from one-fourth to two-thirds longer than the Up. 7.' L. leucostachvs. 



Lip hnear, i. e„ not at all dilated at the base. ^w^-'^v^- 



Spur shorter than the Up, decidedly saccate. 1 l stricta 



Spur much exceeding the Up, flUform. 



Spike comparatively dense. 8. L. enaifolia. 



Spike very lax. 9. /,. lariflora. 



1. L. Stricta (Lindl.) Rydb. Stem tali and strict, 3-10 dm. high; lower 

 leaves oblanceolate, obtuse, 5-12 cm. long, the upper lanceolate, acute; spike 

 1-3 dm. long, lax; flowers 12-14 mm. long; lip linear, obtuse, 5-7 mm. long, 

 thick, purple. Platanthera stricta Lindl. Habenaria gracilis S. Wats. Bogs 

 and wet meadows: Alta.—N.M.— Ore.— Alaska. SuhmonL—Mont, Je-Au. 



2. L. purpurascens Rydb, Stem stout, 3-5 dm. high; leaves ovate to 

 lanceolate, acute, 6-10 cm. long, dark green; spike rather dense; flowers 10-12 

 mm. long; lip about 5 mm. long, scarcely at aU dilated at the base. Damp 

 wooded hillsides and brook-banks: Colo, Suhmont. — Suhalp. Je-Jl. 



3. L. viridiflora (Cham.) Rydb. Stem 2-5 dm. high; lower leaves 5-15 cm. 

 long, oblanceolate, obtuse; spike short and dense; flowers 10-12 mm. long, light 

 green; lip lanceolate, obtuse, less than 5 mm. long. Habenaria hyperborea 

 Coult., not R. Br. Bogs: Alta. — Colo. — ^Alaska. Submont. — Mont. Je-Au. 



4. L. media Rydb. Stem very stout, 4-8 dm. high; leaves lanceolate, acute, 

 1-2 dm. long; spike long, densely flowered; flowers divaricate, about 15 mm. 

 long; lip about 6 mm. long. Bogs: Que.— N.Y.— (Black Hills) S.D. Boreal 

 -Submont, 



