182 ORCHIDACEAE 



Lip broad, slightly 2-cleft at the apex, with or without a mucro in the sinus. 

 Lip with distinct rounded auricles, slightly cleft at the apex; no mucro. 



1. O. borealis. 



Lip with no auricles, but in their place two divergent small teeth at the base; mucro 

 present. 

 Lip unguiculate; lateral teeth small, without a papilla at the base. 



2. O. convallarioides. 

 Lip not imguiculate; lateral teeth prominent, with a papilla at the base. 



3. O. caurina. 



Lip narrow, 2-cleft for about half its length into linear-lanceolate lobes, without a mucro, 

 with narrow teeth at the base. 4. O. nephrophylla. 



1. O. borealis (IMorong) Rydb. Stem 7-1.5 cm. high, pubescent above; 

 leaves 1-3.5 cm. long, elliptic-ovate, obtuse at both ends, borne above the middle 

 of the stem; flowers about 1 cm. long; lip 7-8 mm. long, oblong-cuneate, with 

 2 obtuse lobes at the apex. L. borealis Morong. Damp woods: Mack. — Colo. 

 — Yukon. Subalp. Je-Jl. 



2. O, convallarioides (Sw.) Wight. Stem 1-2 dm. high, glabrous below, 

 glandular above the leaves; leaves borne above the middle of the stem, broadly 

 oval, obtuse, 3-5 cm. long, rounded at the base; lip about 9 mm. long, narrowly 

 cmieate, retu.se. L. convallarioides {Sw.) Torv. Moist woods: N.S. — Vt. — Mich. 

 — Ida. — -Calif. — Alaska. Mont. Je-Au. 



3. O. caurina (Piper) Rydb. Stem 1-3 dm. high, glabrous below, densely 

 glandular-pubescent above the leaves; leaves 3. .5-7 cm. long, oval to elliptic- 

 ovate, rounded at the base, borne above or at the middle of the stem; lip 5-6 

 mm. long, cuneate, retuse, with a blunt mucro in the sinus, sessile. L. caurina 

 Piper. Damp mossy woods: B.C. — Mont. — Ida. — Ore. Mont. Je-Jl. 



4. O. nephrophylla Rydb. Stem slender, 1-2 dm. high, glabrous or 

 slightly pubescent above the leaves; leaves inserted at the middle, rounded-reni- 

 form, about 2 cm. long, 2-2.5 cm. wide, strongly veined; flowers greenish, 5-6 

 mm. long; sepals and upper petals oblong, 1.5-2 mm. long; lip 4-5 mm. long. 

 L. nephrophylla Rydb. Damp woods: Mont. — ■N.M.--Ore. — Alaska. Sub- 

 mont. — Subalp. Je-Au. 



13. PERAMIUM Salisb. Rattlesnake Plantain. 



Caulescent perennial herbs, with rootstocks and fleshy-fibrous roots. Leaves 

 alternate, mostly basal, strongly reticulate and often blotched. Flowers in 

 terminal spikes, white or pink, inconspicuous. Lateral sepals distinct, spread- 

 ing; the upper united with the lateral petals. Lip sessile, concave or gibbous, 

 without callosities. Fertile anther solitary, short-stalked on the column, with- 

 out a lid. Pollinia 2, one in each sac, attached to a small disk. Column 

 straight, rather short. [Goodyera R. Br.] 



Lip evidently saccate, with recurved margins. 1. P. ophioides. 



Lip scarcely saccate, with incurved margins. 2. P. decipiens. 



1. P. ophioides (Fernald) Rydb. Scape 1-2 dm. high, glandular-pubescent; 

 leaves 1-2 cm. long, broadly ovate, dark green, usually with white blotches, 

 most conspicuous along the cross-veins; flowers greenish white, 4-5 mm. long; 

 upper sepal concave, with a short strongly recurved tip; anthers blunt. Good- 

 yera repens Am. auth. and var. ophioides Fernald. Cold mossy woods: N.S. — 

 N.C.— S.D.— N.M.— Ala.ska. Mont. Jl-Au. 



2. P. decipiens (Hook.) Piper. Scape 2-4 dm. high, glandular-pubescent; 

 leaves ovate-lanceolate, 4-6 cm. long, acute at both ends, often without blotches; 

 spike one-sided; flowers 7-9 mm. long; upper sepal concave, ovate-lanceolate, 

 the tip long, often recurved; anthers ovate, long-pointed. G. Menziesii Lindl. 

 P. Menziesii (Lindl.) Morong. Woods: Que. — N.H.— Minn. — Ariz. — Cahf. — 

 Alaska. Submont. — Mont. Jl-S. 



14. MALAXIS Soland. Adder's Mouth. 



Caulescent perennial herbs, with corms. Leaves 2 or in our species 1, on the 

 stem. Flowers in terminal racemes, white or greenish. Sepals distinct, spread- 

 ing. Lateral petals very narrow, often filiform, spreading. Lip broad, cordate 



