TWO NEW AMERICAN ORCHIDS 
BY 
Donovan S. CorRRELL 
IL A New CoraAbLLORRHIZA FROM MEXICO 
The genus Corallorrhiza comprises a small group of 
saprophytic plants which attain their greatest develop- 
ment in the United States. Some of the species are widely 
distributed. For instance, C. odontorhiza (Willd.) Nutt. 
(to which this new species is most closely allied) is found 
from southern Maine, through the eastern and south- 
central United States, south to Honduras in Central 
America. 
Corallorrhiza Williamsii Correll sp. nov. 
Herbae simplices, graciles, nudae, saprophyticae. Caulis 
erectus, basi bulboso-incrassatus, vaginis arcte adpressis 
obtectus. Inflorescentia racemosa, laxa, pauciflora. Bract- 
eae minutae. Flores parvi. Sepala lineari-oblonga, sub- 
obtusa vel acuta; sepala lateralia leviter obliqua. Petala 
lineari-elliptica, obtusa, leviter obliqua, crenulata. Label- 
lum obovato-suborbiculare, apice truncatum vel rotun- 
datum, ecallosum, trinervium, marginibus  lateralibus 
subintegris vel erosis. Columna generis. Capsula ovoidea. 
Slender leafless saprophytic herbs, 15-80 cm. tall. Stem 
erect, bulbous-thickened at the base, yellowish brown, 
concealed by closely appressed sheaths. Inflorescence a 
lax few-flowered raceme, up to 7.5 cm. long. Floral 
bracts minute, less than 1 mm. long. Flowers small, on 
filiform pedicels which are about 3.5 mm. long. Sepals 
and petals purplish. Sepals linear-oblong, subobtuse to 
acute, 4.5-6 mm. long, 0.8-1 mm. wide; lateral sepals 
slightly oblique. Petals with a slender claw, linear-ellip- 
tic, obtuse, slightly oblique, the margins often crenulate, 
4—5.5 mm. long, 1—1.2 mm. wide. Lip white, marked with 
purple, with a slender claw, obovate-suborbicular, trun- 
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