98 PROCEEDINGS OF THE AMERICAN ACADEMY. 



sinning above, conspicuously 3-5-nerved: petioles 1.5 to 3 cm. long, and 

 as well as the stem strigose-pubescent : inflorescence a terminal com- 

 pound corymbose cyme : heads small, about 5 mm. high, disposed iu 

 glomerules : involucral bracts ovate, obtuse, appressed-cinereous-pubes- 

 cent, the outer shorter: ray-flowers mostly 3 : mature achenes obovate, 

 about 2 mm. long, glabrous : sterile flowers few, 3 to 5. — Costa Rica. 

 Forets de La Palina, altitude 1459 m., 8 September, 1898, Ad. Tondiiz, 

 no. 12,537 (lib. Gr., and lib. Inst. Phys.-Geog. Cost. Ri.). 



Clibadium caracasanum, DC. Prodr. vi. 506. To this species 

 the following collections may be referred : Venezuela. Tovar, Fendler, 

 no. 640 (hb. Gr.). Panama. Gatun Station, Sutton Hayes, no. 89 (hb. 

 Gr.). Costa Rica. Canas Gordas, H. Pittier, rxo. 11,068 (hb. Gr., 

 and hb. Inst. Phvs.-Geoij. Cost. Ri.). 



Clibadium glomeratura. Stem stout, densely soft-tomentose : 

 leaves opposite, loug-petiolate, ovate, 1 to 2 dm. long, 0.5 to 1.5 dm. 

 broad, acute, crenately and somewhat unequally dentate, obtuse to sub- 

 cordate at the base, scabrous-pubescent above, densely soft-pubescent 

 beneath, 3-nerved from a point considerably above the base below which 

 are two or three pairs of less conspicuous lateral nerves : inflorescence 

 terminating the stem and branches in compound corymbose jinbescent 

 cymes: heads small, few-flowered, about 5 mm. high, disposed iu dense 

 glomerules 5-8 (-10) mm. iu diameter : involucral scales oblong or ovate- 

 oblong, 2 to 3 mm. long, glabrous, ciliate : ray-flowers mostly 5, in 1 to 

 2 series : mature achenes narrowly obovate, about 2 mm. long, glabrous 

 below, villous-pubescent above. — Costa Rica. Forets de Luis, altitude 

 650 m., November, 1897, Ad. Tonduz, no. 11,508 (hb. Gr., and hb. Inst. 

 Phys.-Geog. Cost. Ri.). 



Clibadium Pittieri. Stem terete, appressed-pubescent : leaves op- 

 230site, petiolate, ovate, 1 to 1.5 dm. long, 4 to 8 cm. broad, acuminate, 

 acute, dentate above the middle, entire and narrowed below into the 

 1 to 6 cm. long petioles, hirsute-pubescent upon both surfaces, 3-5-nerved 

 from just above the base : inflorescence terminating the stem and 

 branches in corymbose clusters : heads about 5 mm. high : involucre of 

 narrowly ovate acute strigose-pubescent bracts : ray-flowers several in 

 about three series : mature achenes obovate, 2 mm. long, glabrous at 

 the base, pubescent at the apex. — Costa Rica. La Florida voie ferree 

 Atlantique, altitude 80 m., July, 1897, H. Pittier, no. 11,290 (hb. Gr., 

 and hb. Inst. Phys.-Geog. Cost. Ri.). In general habit this species 

 approaches most closely G. surinamense, L., but is readily distinguished 

 from it by the conspicuous hirsute pubescence of the upper leaf-surface, 



