lum dorsale lanceolatum, acutum. Sepala lateralia lig- 
ulata vel lanceolata, acuta, leviter arcuata. Labellum 
lineari-oblongum vel oblongo-lanceolatum, obtusum, ad 
basim attenuatum et subauriculatum. 
Small, slender, erect, terrestrial herbs, up to 80 cm. 
tall. Roots fleshy, fascicled, fusiform. Stems very slen- 
der, provided with several scarious, acuminate bracts on 
the lower half. Leaves appearing before the flowers and 
soon withering, up to about 8 cm. long and 1.5 cm. 
broad, petiolate; the blade elliptic, acute, attenuated 
into the petiole at the base. Inflorescence a strict, slen- 
der, many-flowered raceme, up to about 16 cm. long; 
floral bracts 2-5 mm. long, cucullate, lanceolate, acumi- 
nate or aristate. Flowers small, white suffused with pink. 
Sepals lightly connate at the base and forming a tube. 
Dorsal sepal 2-38 mm. long and 0.5-0.7 mm. broad, lan- 
ceolate, acute. Lateral sepals 83-4 mm. long and 0.6-1 
mm. broad, ligulate to lanceolate, acute, slightly arcuate, 
decurrent on the ovary and forming a subsaccate pouch 
into which the base of the lip fits. Petals 2.5-8 mm. 
long and 0.6-0.8 mm. broad, ligulate, obtuse, arcuate, 
lightly adnate to the dorsal sepal. Lip 8-4 mm. long and 
about 1.2 mm. broad, linear-oblong to oblong-lanceolate, 
obtuse, apex often crenulate-crisped, narrowed to the 
base and provided with two subauricular callus-thicken- 
ings. 
Mexico: mountains of Tlapacapan, west of Yantepec, State of More- 
los, longitude 99°04! west, latitude 18°53’ north, altitude about 1700 
m., February 12, 1934, Juan G. lonzales| 3369 (Tyrer in Herb. Ames 
No. 51335); mountains above Puente de Ixtla, State of Morelos, lon- 
gitude 99°09! west, latitude 18°37’ north, altitude 1400 m., March 
1, 1934, Nagel & Juan G. lonzdles| 3675. 
Spiranthes triliniata Lindl. var. crenulata L.O. 
Williams var. nov. 
Haee varietas labelli lobo medio longiore crenulato a 
specie differt. Sepala lateralia obtusa. 
[ 2386 ] 
