Deiregyne pandurata Garay, sp. nov. 
Plantae terrestres, erectae, usque ad 40 cm. altae; radicibus 
fasciculatis, crassiusculis, breviter tomentosis; scapo stricto, 
supra basin 2-foliato, sursum bracteis hyalinis, decrescentibus 
transeunti; inflorescentia laxe pauciflora; bracteis ovato-lanceola- 
tis, acuminatis, hyalinis, ovariis superantibus, usque ad 2 cm. 
longis; floribus satis magnis, glabris, niveis, nervis discoloribus; 
sepalo postico ligulato, acuto, usque ad 12 mm. longo, 2.5 mm. 
lato; sepalis lateralibus oblongo-linearibus, obtusis, usque ad 13 
mm. longis, 2 mm. latis; petalis lineari-oblanceolatis, paululo 
sinuosis, basin versus angustatis, usque ad 10.5 mm. longis, 2 
mm. latis; labello e cuneata basi anguste pandurato, parte basali 
angulato-rhombeo, parte apicali ovato, carnoso, leviter crenu- 
lato, margine supra basin utrinque caloso-incrassato, in medio 
isthmifero; toto labello usque ad 14 mm. longo, 5 mm. lato; 
columna gracili; 7 mm. longa; rostello oblongo-ligulato, acuto; 
ovario clavato, leviter torto. 
Mexico: Durango, between Guanacevi and Guadalupe. Coll. 
Juan Gonzales no. 5810! Type! (AMES). 
This specimen was included by Williams in the type descrip- 
tion of his Spiranthes falcata L.O.Wms. It differs from the later 
in the shape and proportions of the petals and lip and the 
construction of the column, especially in the shape of the 
rostellum. 
Deiregyne rhombilabia Garay, sp. nov. 
Plantae terrestres, erectae, supra metrales; radicibus fascicu- 
latis, carnosis, stipitato-tuberosis; foliis caulinis, satis tenuls, 
anguste ellipticis, acutis, basi longe vaginantibus imbricatisque, 
sub anthesin satis emarcidis, usque ad 15 cm. longis, 4cm. latis; 
calibus érectis, validis, strictis, dimidio inferiore usque ad 5- 
foliatis, dimidio superiore vaginis, hyalinis imbricatisque om- 
nino obtectis; spica terminali, spiraliter quaquaversa, dense 
multiflora, usque ad 25 cm. longa; bracteis hyalinis, lanceolatis, 
acuminatis, usque ad 25 mm. longis; floribus inter mediocres, 
griseo-viridibus; sepalo postico oblongo-ligulato, obtuso, extus 
pubescenti, usque ad 10 mm. longo, 4 mm. lato; sepalis 
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