38 PROCEEDINGS OF THE AMERICAN ACADEMY. 



long, 2 to 4.5 cm. 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. — Mexico. State of Jalisco: Zapotlan, 9 October, 1903, 

 E. W. D. Holwmj, no. 5137 (hb. Gr.). 



Clibadium Pittieri, 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 

 a 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 or 

 slightly pubescent : leaves opposite, detoid-ovate to ovate-lanceolate, 7 to 

 22 era. long, 2.5 to 11 cm. 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 

 12 mm, 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, 

 linear-oblong, the expanded portion about 5 mm. long, 1 mm. broad, 

 obtuse 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 li. ararjonensis resembles R. polymnioides, Greenm., but is 

 readily distinguished from it by the absence of jiilose hairs on the stem 

 and in the inflorescence, the smaller fewer-flowered heads, the shorter 

 pales of the receptacle, and the narrowed fewer-nerved barely dentate 

 rays. 



Solerocarpus sessilifolius, n. sp. Stems ascending, 3 dm, or more 



