308 PROCEEDINGS OF THE AMERICAN ACADEMY, 
Spiranthes tenuiflora. Roots several, fleshy, tuberous: stems 
3 to 6.5 dm. high, bearing at the base remnants of the old radical leaves, 
above clothed with alternate lanceolate-acuminate white scarious imbri- 
cated bracts or sheaths, these somewhat more remote toward the 
inflorescence: racemes 1 to 2 dm. long, many-flowered, somewhat 
glandular-pubescent ; bracts ovate, lanceolate, acuminate, 3-nerved, shorter 
than the sessile slender flowers (2 cm. long): outer lateral divisions of the 
perianth lance-oblong, obtuse, 3-nerved, about 6 mm. long, 2 mm. broad, 
the upper sepal somewhat longer and broader than the lateral one ; lateral 
petals narrowly lance-oblong, obtuse, shorter than and more or less 
connivent with the upper sepal; labellumin general outline oblong, about 
7 mm. long, short-unguiculate, slightly hastate by a rather prominent 
tubercle on either side at the base, terminated by a broadly ovate-reni- 
form acute somewhat turbinate conspicuous expansion, 5-7-nerved, bear- 
ing just above the hastate base minute papillae. — Collected by C. G. 
Pringle in lava fields near Cuernavaca, Morelos, altitude 1,525 m., 16 
February, 1899, no. 6995. A very striking and characteristic species, 
readily recognized by the white showy bracts sheathing the stem, and 
by the elongated racemes with long slender more or less remote reddish 
or reddish-yellow sparingly glandular-pubescent flowers. 
Hosackia REPENS, Don, Gen. Syst. of Gard. & Bot., ii. 2005 
Walp. Rep., ii. 855. Specimens collected by C. G. Pringle in ditches 
at Tlalpam, Valley of Mexico, 20 August, 1896, no. 7240, and by Dr. 
J. W. Harshberger, no. 170, are referred with little doubt to the above 
meagrely described and little understood species. As the specimens 
cited accord well with the brief characterization of Don, it seems best t0 
take up the above name, and to present herewith the following amplified 
description. — An herbaceous perennial: stems repent or ascending, 
3 to 7 dm. long, more or less branched, glabrous below, pubescent above: 
leaves including the petiole 2 to 6 cm. long, 5-9-foliolate; stipules 
triangular, acuminate, 2 to 5 mm. long; leaflets obovate-oblong, 1 1 
2 cm. long, 4 to 8 mm. broad, obtuse, mucronate, narrowed below 
into a conspicuously blackened rather slender (1 mm. long) petiolule, 
green and glabrous above, somewhat paler and’ pubescent beneath : 
inflorescence corymbose on long slender peduncles, these 8 to 18 cm. ™ 
length, much exceeding the leaves; umbel usually 5-flowered, and sub- 
tended by a short-petioled 3-5-foliolate bract: flowers 1 to 1.4 em 
long, yellow, on short blackish pubescent pedicels : calyx-teeth lanceolate, 
3 mm. long, about equalling the more or less reddish-maculate tube, bot 
tube and calyx-teeth pubescent: standard obovate-oblong, slightly 
