se 
28 PROCEEDINGS OF THE AMERICAN ACADEMY. 
17. C. trichotoma, Donnell Smith. Densely fuscous-tomentose: 
leaves ovate, acutish, crenate-serrate, scabrous above, somewhat canes- 
cent-tomentose beneath, 1 to 2} inches long, one half to two thirds as 
broad; stems somewhat tortuous as though scandent. — Bot. Gaz. Xxiil. 
299. — Rocky mountain sides near Coban, Dept. Alta Verapaz, altitude 
4,300 feet, von Tuerckheim (no. 1353 of Donnell Smith’s sets); Chiapas, 
table land about Ocuilapa, altitude 3,400 to 3,800 feet, H. W. Nelson, 
no. 3004. 
++ ++ Heads campanulate, many-flowered : scales of the involucre glabrous: leaves 
very large (2} inches or more in breadth): pedicels less than an inch in 
ength: Costa Rican speci 
18. C. waliticiiiwar bia: Klatt. Leaves membranaceous, broadly 
ovate, 4 inches long, two thirds as broad, long-acuminate, serrate-dentate, 
rounded at the base; petiole 5 lines long, densely pilose: ligules 6, 2 lines 
in length. — Bull. Soc. Bot. Belg. xxxi. 207.— In woods at Terraba, 
altitude 900 feet, Pittier, nos. 3707, 3726. A species not seen by the 
writers; the description is condensed from the original characterization. 
++ ++ ++ Heads campanulate, many-flowered: scales of the involucre multiseriate, 
sub-herbaceous, very pubescent: pedicles half inch or less in length : leaves 
smaller: Mexican species. 
19. C. scabrifolia, Benth. & Hook. f. Shrub: leaves ovate 
oblong or oblong-lanceolate, attenuate, serrate or serrulate, thickish 
above papillose-pubescent and very scabrous, below sparingly pubescent, 
slightly paler and with veins very prominent: pedicels and involucral 
bracts densely canescent-tomentose: disk-flowers 125 or more; Tay- 
flowers 20 to 25, the latter without pappus: plant drying green. — Benth. 
& Hook. f. acc. to Hemsl. Biol. Centr.-Am. Bot. ii. 206. Allocarpus 
scabrifolius, Hook. & Arn. Bot. Beech. 300. Ferdinanda oppositifolia, 
Schz. Bip. in Seemann, Bot. Herald (by error cited as Zaluzania by 
Benth. & Hook. f. Gen. ii. 391). Perymenium album, Wats. Proce. An. 
Acad. xxv. 154. — N. W. Mexico in Sierra Madre, Seemann ; Jalisco, 0? 
mountains near Lake Chapala, Pringle, no. 2438, in fl. December; 
Alamos, Palmer, no. 283. 
O. C. submembranacea, Fernald. Similar in habit: leaves 
thinner, nearly smooth and somewhat lucid, somewhat nigrescent in 
drying. — Bot. Gaz. xx. 535.—On mountain sides, Zopelote, Tepic, 
altitude 3,000 feet, Lamb, no. 554. 
++ ++ ++ ++ Heads few ; campanulate: scales of the involucre bionl, few-seriate, 
glabrous: pedicels very long (1} to 2 inches) : plant essentially glabrous. 
21. C. longipedicellata. Shrub, glabrous throughout except the 
puberulent summits of the long pedicels: leaves elliptical, acutish at bots 
