212 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 

 7. CORALLORRHIZA. Coralroot 



Plants without chlorophyll, the leaves reduced to sheathing scales; 

 rootstock thick, branching, corallike; flowers in racemes ; lateral sepals 

 united with the base of the column, often forming a short spur or 

 projection, this adnate to the summit of the ovary. 



Key to the species 



1. Lip darker colored than the other perianth segments, oval or oblong-ovate, 

 conspicously striate- veined (as are the other segments), entire; spur 



none 1. C. striata. 



1. Lip contrasting sharply in color with the other (brown) perianth segments, 

 whitish and more or less spotted with crimson, broadly ovate, obovate, or 

 suborbicular, erose-denticulate; spur or a saclike protuberance present (2). 

 2. Lip conspicuously lobed or toothed on each side near the base; outer peri- 

 anth segments obtuse or acutish 2. C. maculata. 



2. Lip not lobed or toothed at base; outer perianth segments acuminate. 



3. C. WISTERIANA. 



1. Corallorrhiza striata Lindl., Gen. et Sp. Orchid. 534. 1840. 

 Sierra Ancha, Gila County {Harrison 7864), Chiricahua Mountains, 



Cochise County (Blumer 2019), Santa Catalina Mountains, Pima 

 County (Peebles and Harrison 2225), 7,500 to 9,000 feet, in deep shade 

 of pine and spruce forests, July. Quebec to British Columbia, 

 Michigan, Arizona, and California. 



2. Corallorrhiza maculata Raf., Amer. Monthly Mag. 2: 119. 1817. 



Corallorrhiza multiflora Nutt., Acad. Nat. Sci. Phil a. Jour. 

 3:138. 1823. 



Lukachukai and White Mountains (Apache County), San Fran- 

 cisco Peaks (Coconino County), south to the Pinaleno Mountains 

 (Graham County) and the Santa Catalina Mountains (Pima County), 

 6,000 to 10,000 feet, in coniferous forests, June and July. Nova Scotia 

 to Alaska, south to Florida, New Mexico, Arizona, and California. 



3. Corallorrhiza wisteriana Conrad, Acad. Nat. Sci. Phila. Jour. 6: 



145. 1829. 

 San Francisco Peaks (Coconino County), Sierra Ancha and Pinal 

 Mountains (Gila County) , Santa Catalina Mountains (Pima County), 

 6,000 to 7,500 feet, May. Pennsylvania to Florida and Texas; 

 Arizona. 



8. MALAXIS. Addersmouth 



Small plants with flowering stems from a corm, bearing a solitary 

 rounded-ovate clasping leaf; flowers inconspicuous, in a terminal 

 raceme or spike; sepals and petals separate, spreading; lip cordate or 

 lobed at base. 



Key to the species 



1. Inflorescence a short, often corymbiform, loose raceme; leaves deeply cordate 



at base; pedicels equaling or longer than the flowers- _ 1. M. corymbosa. 



1. Inflorescence elongate, not corymbiform; leaves not, or very slightly, cordate 



at base (2) . 



2. Flowers 3 to 4 mm. long, sessile, greenish yellow, in a dense elongate spike 



3 to 4 mm. wide; perianth segments oblong to ovate__ 2. M. soulei. 



2. Flowers commonly more than 4 mm. long, on pedicels half to equally as long 



as themselves; inflorescence loosely racemose; perianth segments linear 



or narrowly lanceolate (3). 



3. Flowers greenish, 10 to 12 mm. long 3. M. tenuis. 



3. Flowers brownish purple, 4 to 6 mm. long 4. M. ehrenbergii. 



