ROBINSON. — MEXICAN PLANTS. 323 



mens bear out Dr. Watson's amplification of the characters, and confirm 

 its distinctness from L. elliptica, Reichb. f. 



Isochills DNILATERALE. Glabrous : stems several, slender, sim- 

 ple, 8 inches in height, roughened especially near the base by numer- 

 ous minute warts : leaves linear, slightly retuse, rather rigidly erect, 

 1^-2 inches long, finely striated : racemes single, simple, terminal, 

 secund, about 7-tlowered : bracts oblong, obtuse, purplish ; pedicels 

 exserted 2-3 lines : flowers large for the genus, 6 lines long, purple, 

 strongly gibbous upon the side toward the labellum, not noticeably 

 fleshy : sepals subequal in length, carinate, acutish : petals oblong, 

 obtusish, slightly broader than the sepals, aud not carinate; labellum 

 lance-oblong, with the sigmoid flexure characteristic of the genus but 

 without lateral lobes : fruit 6 lines in length. — Collected on oaks, 

 Tamasopo Canon, 23 June, 1891 (no. 511 G). This species, with much 

 the habit of I. lineare, R. Br., has larger more one-sided flowers in 

 a looser raceme. 



Nkmastylis flava. Bulb ovoid, 8 lines in diameter, dark brown, 

 with a tuft of fibrous roots at the base ; stems or rather scapes 1 

 to 3, slender, simple, leafy only at the base, 8-10 inches high, bearing 

 at the summit a single 2-3-flowered spathe of 3 unequal lance- 

 linear or linear-oblong acuminate bracts (the largest 1^—1 ^ inches in 

 length) : the outer leaves reduced to acute scale-like theaths ; the 

 inner narrowly linear, attenuate, equalling the scape : pedicels about 

 an inch long: flowers 1-1 \ inches in diameter, bright yellow: seg- 

 ments oblanceolate to obovate, acuminate ; the outer 7 lines in length ; 

 the inner two thirds as long and with rounded thickened areolae at the 

 base : filaments connate ; column 1^ lines high ; anthers 2^ lines long, 

 inclining to curl with age: capsule ovoid, smooth, shallowly six-fur- 

 rowed, ^ inch in length. — Collected on gravelly soil near Guadalajara. 

 23 June and 21 August, 1893 (no. 4400). Near N. bracteolata. 

 Baker, but with single heads, distinctly unequal perianth segments, 

 and, of course, different geographic position. 



Dioscorea grandifolia, Schlecht. Mr. Pringle's no. 4547, col- 

 lected on talus of cliffs, barranca of Tequila, 4 October, 1893, corre- 

 sponds well to the characterization of this species. The fertile plant, 

 of which I find no description, furnishes the following characters : 

 fruiting racemes about 3 inches in length upon peduncles about an 

 inch long: fruit elliptic in outline, reflexed-spreading, not closely 

 imbricated, 7 lines in length, half as wide. 



D. Pringlei. Glabrous : stem twining : leaves ovate, acuminate, 

 entire, cordate with an open sinus, 9-11-nerved, somewhat paler 



