38 PROCEEDINGS OF THE AMERICAN ACADEMY. 
long, 2 to 4.5 em. broad, acuminate, acute, shallowly dentate, narrowed 
below into a subpetiolate base, 3-nerved, dark green and essentially 
glabrous above, paler and crisp-pubescent on the conspicuously anasto- 
mosing veins and somewhat ferruginous-pubescent on the midrib and 
nerves beneath: inflorescence corymbose, and as well as the younger 
branches ferruginous-pubescent in decussating lines: heads in glomerules 
5 to 6 mm. high and nearly or quite as broad, disposed in a terminal 
crowded corymb; bracts of the glomerule and of the involucre brownish, 
glabrous or nearly so: achenes oblanceolate, about 2 mm. long, black 
and glabrous. —Mexrco. State of Jalisco: Zapotlan, 9 October, 1903, — 
£. W. D. Holway, no. 5187 (hb. Gr.). 
’ Cxirpapium Pirriert, Greenm., forma phrixium, n. form. Stem 
pubescent with spreading hirsute-hispid hairs: foliar characters and 
details of the head the same as the species. — Costa Rica. “ Con- 
fluent du Puerto Viejo et du Sarapiqui,” January, 1893, P. Biolley, 
no. 7399 (hb. Gr., and hb. Inst. Physico.-Geogr. Cost. Ri.) ; ‘“ Buissons 
i Tuis,” altitude 650 m., December, 1897, Ad. Tonduz, no. 11,479 
(hb. Gr., and hb. Inst. Physico.-Geogr. Cost. Ri.). 
Rumfordia aragonensis, n. sp. Stem erect, striate, glabrous oF 
slightly pubescent: leaves opposite, detoid-ovate to ovate-lanceolate, 7 to 
22 cm. long, 2.5 to 11 em. broad, acuminate, acute, mucronate-denticulate, 
abruptly narrowed below the middle into a winged petiole continuous 
about the stem, thin or membranous, 3-nerved, sparingly puberulent on 
both surfaces: inflorescence a terminal corymbose cyme: heads about 
12mm. high, radiate: involucre 2-seriate ; outer bracts of the involucre 
foliaceous, ovate and acute to ovate-lanceolate and acuminate-acute, 
glabrous or essentially so; inner bracts of the involucre lanceolate, 
somewhat navicular, stipitate-glandular, more or less closely surrounding 
the glabrous ray-achenes: ray-flowers sub-biseriate, fertile; rays small, © a 
linear-oblong, the expanded portion about 5 mm. long, 1 mm. broad, 
tuse or rarely toothed, usually 2-nerved: disk-flowers 20 to 30: 
achenes obovate, glabrous, one half shorter than the pales of the recep- 
tacle. —Costa Rica. “Broussailles pres d’Aragon,” Turrialba, alti- 
tude 620 m., 2 January, 1899, H. Pittier, no. 13,246. In general 
aspect ft. aragonensis resembles R. polymnioides, Greenm., but is 
_ readily distinguished from it by the absence of pilose hairs on the stem 
__ and in the inflorescence, the smaller fewer-flowered heads, the shortet Z 
pales of the receptacle, and the narrowed fewer-nerved barely dentate 
rays. 
_ Sclerocarpus sessilifolius, n. sp. Stems ascending, 3 dm. or more 
Oe ee ee 
aes 
