160 ORCHIDACEAE 
1. M. monophyllos, (L.) Lindl. (Fig. 4, pl. 21.) Wautre Apprr’s 
Moutu. Stem slender, 4 to 6 in. high. The single leaf sheathing the 
stem, The very slender spike of small white flowers about 4 the length 
of the stem. The flower stalk-shorter than the flower, each with a small 
bract. Lip heart-shaped with the apex contracted to a narrow point. 
In woods and wet places, throughout our area. July. 
2. M. unifolia, (Michx.) BSP. (Fig. 7, pl. 21.) Green ADDER’S 
Mourn. Stem 6 to 10 in. high, it and the leaves much like No. 1. Spike 
of flowers short, not 1/3 the length of the stem and much broader than 
that of No. 1. The flower pedicel longer than the flower. Lip broad, al- 
most fan-shaped, 3-lobed at apex. Cold wet ground, not frequent. July. 
ir. LIPARIS, Rich. (Leptorchis, Thouars) 
Low herbs arising from solid bulbs with naked stem and two broad 
leaves at base. Flowers in rather broad spikes. Sepals and petals nar- 
row and nearly equal; lip broad, often with 2 tubercles near the base. 
1. L. liliifolia, (L.) Richard. (Fig. 8, pl. 21.) Large TwayBLapE, 
Stem 4 to 10 in. high; leaves broad elliptic or oval. Spike of 5 to 15 
showy flowers, the linear petals and sepals white or greenish-white, the 
lip purple-brown. Flower stalk nearly an inch long. Lip broad oval, 
as long as the petals. Woods and thickets. May-July. 
2. L. Loeselii, (L.) Richard. (Fig. 9, pl. 21.) FEN Orcnis. Stem 
2 to 8 in. high; leaves oval. Spike few flowered (3-6). Petals and 
sepals linear, unequal; lip wedge-shaped, often in 3 lobes at apex, the 
middle lobe longest. Sepals and petals greenish-white, lip yellowish- 
green. Wet places. June. 
12, CALYPSO, Salisb. 
A small herb arising from a solid bulb, with stem 3 to 6 in. high and 
with a single leaf at the base of the stem and a single flower at its 
summit. Stem with 2 or more sheathing bracts. The sepals and petals 
nearly equal, the lip large and inflated. 
C. bulbosa, (L.) Oakes. (Fig, 3, pl. 21.) Catypso. Flower showy; 
leaf nearly round but somewhat pointed at apex. Flower purple, pink 
and yellow, somewhat resembling the flower of Cypripedium. Rare in our 
region, but found oceasionally in woods. May-June. 
13. CORALLORRHIZA, R. Br. 
Plants mostly without green coloring. Stem and scales brown or 
purplish. Flowers in loose terminal spike. Lip 1 to 3 ridged, projecting 
backward as a spur which grows fast to the ovary or which is entirely 
suppressed. Petals and sepals nearly equal. Roots of coralloid branch- 
ing masses. 
Small spur or little sac or depression of lip at summit of ovary. 
Lip egg-shaped with 2 conspicuous lateral teeth near the base C. trifida 
Lip inversely egg-shaped, wavy or with minute teeth at the borders. 
odontorhiza 
Lip broadly egg-shaped, white with crimson spots . . . C. Wéisteriana 
Lip in general outline egg-shaped, with a conspicuous rounded lobe 
at each side near the base. . «+ «© « «© «© e © « « C. maculata 
No spur or sac to the lip. < 
Lip egg-shaped, with wavy border . .« »« « «© « « « «+ C. striata 
