22 PROCEEDINGS OF THE AMERICAN ACADEMY. 



147; on slopes of a barranca near Guadalajara, Prmgle, uo. 2904; and 

 Michoacan, on grassy hills near Patzcuaro, Pringle, no. 4125 ; fl. July. 

 * * Leaves ovate, abrupt or cordate at the sessile or subsessile base. 



3. C. elegans, DC. Leaves thickish, quite glabrous above, finely 

 pubescent upon the veins beneath, ovate to ovate-lanceolate, few-toothed, 

 long-acumiuate, considerably paler beneath : heads loosely or somewhat 

 closely cymose at the ends of the branches : ra3s about 8 or 10. — Prodro 

 V. 674. Oteiza acuminata, Llav. Reg. Trim. Mex. 1832, 41. — Valley 

 of San Luis Potosi, Schaffner, no. 237, and Parry 8^ Palmer^ no. 491 ; 

 and in Tultenango Canon, State of Mexico, Pringle, no. 4297, with 

 heads more aggregated ; fl. August till last of October. An imperfect 

 specimen collected by Baites, 1846, in Mexico, without more precise 

 locality, is probably of this species. 



4. C. multiradiata, Seaton. Herbaceous, erect or decumbent, 

 with habit of the preceding but with sessile leaves thinner, less attenuate, 

 appressed-pubescent upon both surfaces and scarcely paler beneath : heads 

 on very long peduncles, 3 or 4 in number : rays 15 to 20. — Proc. Am. 

 Acad, xxviii. 120. — Wooded slopes of Mt. Orizaba, altitude 10,000 feet, 

 Seaton, no. 167, in part. In flower in August. With the type material 

 of this species in the Gray Herbarium were associated specimens of a 

 Sabazia and Tridax of similar habit. 



5. C. sabazioides, Hemsl. " Slender herb, 1 to 1^ feet high, pro- 

 cumbent, rooting at the base, in habit very similar to Sabazia sarmentosa : 

 leaves decussate, ovate, petiolate, acute, crenate, 3-nerved, hirsute : heads 

 solitary, radiate, as large as in Tridax : bractioles [chaff] scarious, uni- 

 nerviate, pale fuscous, oblong-ovate, 2-dentate beneath the gradually and 

 narrowly acuminate summit: rays purplish white." — Biol. Cent.- Am. 

 Bot. ii. 206. Allocarpus sabazioides, Less. Linnaea, ix. 590. — Near San 

 Miguel del Soldado and La Joya, S. Mexico. No specimens exactly 

 agreeing with this description have been seen by the writers, and the 

 characters are here translated from the Latin of Lessing. 



Subgenus 3. Eucalea, Benth. & Hook. f. (extended). Heads 

 relatively small and numerous, in close corymbs or somewhat umbellate : 

 rays short or none : scales of the pappus 7 to 20 : leaves sessile or short- 

 petioled, serrate or dentate (in one species subentire). — Gen. ii. 391. 



* Inflorescences terminal, close, on long naked peduncles : upper leaves reduced to 

 small oblong or linear bracts : beads homogamous : pappus often reduced or 

 wholly wanting. — Cali/dermos, Lag. 

 I- Scales of the involucre densel}' fringed with yellowish glandular-tipped hairs. 



6. C. thysanolepis. Slender erect herb, 18 inches to 2 feet high: 

 stem simple, striate, densely pubescent, prolonged at the summit into a 



