r an 
Robinson and Greenman—Menican Plants. 167 
rather slender, nearly terete and leafless up to the first fork : 
branches flattened and narrowly winged, scarcely a line in 
breadth, flexuous, several times forked: radical leaves 6 to 8 
inches long, a line wide, surrounded at the base by fibres of 
decayed leaves; cauline leaves 23 to 4 inches long, 14 to 3 lines 
broad, often falcate : spathes solitary, terminal upon the ultimate 
divisions of the branches, 2(—3)-flowered, 8 to 10 lines long, slen- 
der and not ventricose: flowers 8 lines in diameter, yellow, 
exserted upon slender pedicels: divisions of perianth elliptic: 
‘stamens connate only at the base : capsule shortly obovate-oblong, 
somewhat triquetrous, puberulent when young but quite glabrate, 
at maturity nearly 4 lines in length.—Collected by C. G. Pringle, 
on rocky banks, Sierra de San Felipe, Oaxaca, altitude 7,500 feet, 
11 September, 1894 (No. 4902). 
Nemastyiis Ducrsi Watson, Proc. Am. Acad. xxiv, 86. Add 
syn. WV. flava Robinson, ibid. xxix, 323. Dr. Watson’s species, 
described from drawings and somewhat fragmentary material, 
was not at once recognized upon its subsequent collection in more 
perfect specimens. 
Hzxcutia Prineier Leaves fifteen or twenty, clustered at the 
base, linear-oblong from an ovate base, spinose-tipped and pun- 
gent, about 8 inches long, remotely serrate with firm curved 
reddish spines; margins repand and in dried state involute; both 
surfaces but especially the upper argenteous, scurfy: stem 2 to 4 
feet high, half inch thick, simple, scape-like: panicle a foot 
in length, cylindric, mealy-puberulent: bracts attenuate from an 
ovate base: rhachis flexuous, branches numerous, mostly simple, 
spike-like, ascending or somewhat flexuous and more or less 
spreading: bractlets ovate, acute, erose, each subtending a single 
flower: the ¢ flowers subsessile, outer divisions of the perianth 
ovate-rotund, 3-nerved, scarious-margined, somewhat puberulent 
on the outer surface, a line long, the inner a third longer, elliptic- 
oblong, obtuse: anthers slightly exserted, apiculate: @Q flowers 
sessile; outer divisions of perianth deltoid, acuminate; the 
inner longer, lanceolate, attenuate.—Collected by C. G. Pringle, 
on the east side of the valley of Oaxaca, abundant, sometimes 
growing in patches or masses, May, 1894 (No. 4637). 
DioscorHA caPitLaARIS Hemsl. Specimens corresponding in 
all essential points to Hemsley’s description of this species, have 
been collected by Mr. Pringle, at El Parian, Oaxaca; altitude 
5,000 feet, 3 October, 1894 (No. 5700), and on dry ground in the 
Sierra de San Felipe, altitude 7,000 feet, 11 October, 1894 (No. 
5829). In the latter locality the hitherto undescribed fruit was 
secured, furnishing the following supplementary characters: fer- 
tile spikes simple, 1 to 4 inches long; capsules defiexed, elliptical, 
6 to 7 lines in length, half as broad, tipped with the persistent 
styles and stigmas. 
DroscorEA CONVOLYULACEA Cham. and Schlecht. Specimens 
agreeing well in other respects with this species but having very 
large flowers (5 lines in diameter) were secured by Mr. Pringle 
