broad, the margins fleshy-thickened, short-pubescent. 
Column about 5 mm. long including the lanceolate or 
lanceolate-triangular, flattened rostellum. 
Mexico: under pines, Barranca del Laurel, northeast of Ciudad Guz- 
man, State of Jalisco, altitude 2000 m., longitude 103°26/ west, 
latitude 19°42’ north, February 26, 1936, Nagel § Navarro 5408; 
under pines, Barranca del Laurel, northeast of Ciudad Guzman, State 
of Jalisco, altitude 2000 m., longitude 103°26/ west, latitude 19°42’ 
north, March 8, 1936, Nagel & Navarro 5419 (Tyrr in Herb. Ames 
No. 54606). 
There are a number of species of Spiranthes in Mexico 
which have chartaceous or semi-chartaceous floral and 
cauline bracts. Spiranthes chartacea is perhaps more 
closely allied to S. albovaginata C. Schweinf. than to 
any of the other species, but it is amply distinct in the 
shape of the lip, sepals and petals. 
Spiranthes congestiflora L.O. Williams sp. nov. 
Herbae terrestres, erectae, usque ad 20 cm. altae. 
Folia ignota. Inflorescentia congestiflora, subcapitata, 
pauci- vel pluriflora. Sepalum dorsale lineari-lanceola- 
tum, acutum, carnosum. Sepala lateralia linearia vel 
lineari-lanceolata, acuta, leviter falcata, carnosa. Petala 
anguste oblanceolato-spathulata, acuta vel obtusa, car- 
nosa. Labellum lineari-oblongum, supra basim et sub 
apice constrictum. Columna sectionis. 
Small, erect, terrestrial herbs, up to 20 cm. tall. Scape 
slender, with several scarious, semiamplexicaul, ovate- 
lanceolate bracts. Leaves unknown. Inflorescence con- 
gested, subcapitate, few-to several-flowered. Dorsal sepal 
15-19 mm. long and 8-4 mm. broad, linear-lanceolate, 
acute, fleshy, 8- to 5-nerved. Lateral sepals 14-16 mm. 
long and 2.5-8.5 mm. broad, linear or linear-lanceolate, 
acute, slightly faleate, 3-(4-)nerved, fleshy. Petals 14-15 
mm. long and about 2.5 mm. broad, narrowly oblanceo- 
late-spatulate, acute or obtuse, fleshy, 8-nerved. Lip 
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