ORCHIDACE.E. (ORCHIS FAMILY.) 479 



1. MICROSTYLIS, Nutt. ADDER'S MOUTH. 



Sepals oblong, spreading. Petals filiform. Lip cordate or sagittate, entire 

 or nearly so, sessile. Column minute, 2-toothed at the apex. Anther lid-like. 

 Pollen masses 4, collateral, united by pairs at the apex Low herbs, from 

 bulbous roots. Stem 1 - 2-leaved, sheathed below. Flowers racemed or spiked, 

 minute, greenish. 



1. M. ophioglossoides, Nutt. Leaf solitary near the middle of the 

 5-angled stem, ovate, clasping ; raceme short, with the unexpanded flowers 

 crowded in a globular head, elongated in fruit ; pedicels slender, much longer 

 than the flowers ; lip auricled at the base, 3-toothed at the apex. Low shady 

 woods, Florida, and northward. July -August. Stem 4' -8' high. Leaf 

 1'- 2' long. Flowers \" wide. 



2. M. Floridana, Ohapm. Leaves 2, near the base of the .'5-angled 

 stem, unequal, ovate, or elliptical, sheathing ; raceme slender, acute, elongated 

 in fruit, many-flowered; pedicels longer than the flowers; sepals oblong, 

 spreading, with the margins revolute ; petals reflexed, twisted ; lip round- 

 auriculate-cordate, abruptly narrowed and entire at the apex, depressed at the 

 sinus; capsule oblong or obovate. Wet shady woods, Florida. July -Au- 

 gust. Stem 6'- 12' high. Leaves l'-4' long. Flowers 1" wide. 



2. LIPARIS, Richard. TWAVBLADE. 



Sepals spreading. Petals linear or filiform, spreading or reflexed. Lip 

 entire, flat, often with two tubercles above the base. Column long, semi- 

 terete, incurved, margined at the apex. Pollen masses 4, collateral, united 

 by pairs at the apex. Low herbs, from bulbous roots. Leaves 2, sheathing 

 the base of the scape-like stem. Flowers racemed, greenish or purplish. 



1. L. liliifolia, Richard. Leaves elliptical, obtuse, sheathed at the base ; 



scape 3-angled, 10 - 20-flowered, longer than the leaves ; sepals linear, whitish ; 

 petals filiform, reflexed, yellowish ; lip large, wedge-obovate, concave, abrupt! v 

 pointed, brownish purple. Low shady woods and banks in the upper districts. 

 June- July. Scape 5'- 10' high. Leaves 2'- 4' long. Lip \' long. 



3. CORALLORHIZA, TTaller. CORAL-ROOT. 



Sepals and petals alike, oblong or lanceolate, connivent. Lip clasping the 

 base of the straight 2-edged column, spreading and concave above, 2-ridged 

 near the base, spurless, or with the spur adnate to the ovary. Anther lid-like. 

 Pollen masses 4, incumbent. Low dull-colored leafless herbs, with coral-like 

 roots, sheathed stems, and racemose flowers. 



1. C. multiflora, Nutt. Root branching, toothed; stem stout, 9' -15' 

 high; racemes many-flowered, the bracts small, rounded; sepals and petals 

 purplish brown, 3" long, the whitish lip 3-lobed, spotted ; spur prominent, ad- 

 nate. Shady woods, Tennessee, and northward. July. Raceme 10-30- 

 flowered. 



2. C. odontorhiza, Nutt. Root pinnately branched and toothed ; stem 

 slender above; sheaths 3, elongated; racemes 10- 15-flowered : sepals and 

 petals erect, lanceolate; lip entire, distinctly clawed, oval, with two ridges in 



