tum, cochleatum. Sepala lateralia late lanceolata, leviter 
obliqua, acuta. Petala elliptica, arcuata, acuta. Label- 
lum sagittatum, leviter carnosum. 
Small terrestrial, acaulescent herbs, up to 2 dm. tall. 
Leaves basal, petiolate; lamina 2-8 cm. long and 1.3-4 
em. broad, oval, oblong or oblong-ovate, acute or some- 
what acuminate, 5- to 7-nerved, submembranaceous: 
petiole slender, shorter than the lamina. Scape erect, 
covered with scarious, lanceolate, acuminate bracts. In- 
florescence compact. Flowers small. Dorsal sepal about 
2mm. long and about 1.25 mm. broad, triangular-lan- 
ceolate, cochleate, 1-nerved, pubescent dorsally. Lateral 
sepals about 2 mm. long and 1.2 mm. broad, broadly 
lanceolate, somewhat oblique, acute, 1-nerved, pubescent 
dorsally. Petals 1.5 mm. long and 0.6 mm. broad, ellip- 
tic, arcuate, acute, I-nerved. Lip 1.5—1.8 mm. long and 
1-1.5 mm. broad, sagittate, somewhat fleshy, 1-nerved. 
Column about 1.25 mm. long; anther erect, ovate. 
Ovary densely pubescent. 
Mexico: on rocks in shady, damp places near Verdstegui below 
““Las Canoas,’’ State of San Luis Potosi, sepals dark dingy green, 
petals gray-red, lip whitish with posterior half orange, longitude ca. 
99°28’ west, latitude ca. 21°57! north, altitude ca. 800-900 m., Dino 
5268 (Type in Herb. Ames No. 51234); on rocks in loamy soil, below 
** Tas Canoas’’ near *‘ Espinazo del Diablo,’’ State of San Luis Potosi, 
longitude 99°28’ west, latitude 21°57’ north, altitude ca. 700 m., 
Nagel & Dino 5222. 
Spiranthes pseudogoodyerioides is closely allied to the 
Cuban S. Wrightii (Reichb.f.) Schltr. from which it is 
distinguished by the petals, by the 1-nerved (or obscurely 
3-nerved) lip—in contrast to astrongly 3-nerved lip with 
the veins thickened—and by the leaves which are abrupt- 
ly contracted to the petioles. 
Spiranthes pseudopyramidalis L. O. Williams 
sp. nov. 
Herbae erectae, graciles, terrestres, 3-5 dm. altae. In- 
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