ROBINSON AND GREENMAN. — GENUS CALEA. 23 
- nearly naked peduncle bearing a dense cymose cluster of heads: leaves 
ovate, acute, subcordate at the base, sharply dentate, roughish-pubescent 
upon both surfaces, 3-5-nerved and coarsely reticulate-veined, 1 to 
inches long, a third or half as broad, scarcely paler beneath, closely ses- 
sile: inflorescence and especially the margins of the 3-seriate involucral 
scales densely glandular-pubescent: heads about 18-flowered: chaff ir- 
regularly erose, often constricted below the summit: achenes calvous, 
terete: corolla pubescent. — Collected by Z. W. Nelson on the summit of 
the Sierra Madre near Chilpancingo, Guerrero, altitude 9,000 to 10,200 
feet, in flower 24 December, 1894. 
+ + Scales of the involucre essentially glabrous. 
EPC. peduncularis, HBK. Erect or decumbent, 1 to 2 feet high, 
pubescent and usually more or less scabrous : leaves ovate, closely sessile 
by a broad abrupt or subcordate base, dentate, 14 to 3 inches long, nearly 
half as broad: scales of the involucre yellow : pappus present, about two 
thirds the length of the achenes. — Noy. Gen. & Spec. iv. 295, t. 408. 
Calydermos peduncularis, DC. Prodr. v. 669. ©. scaber, Lag. Nov. 
Gen. 25. Calebrachys peduncularis, Cass. Dict. Sci. Nat. ly.\277. — 
South Mexico, Mt. Jorullo, at 3,000 feet, Humboldt & Bonpland ; Mira- 
dor, Sartorius ; Chiapas, Ghiesbreght, no. 783, and L. W. Nelson, no. 3261; 
mountains near Guapimalpatt, Mexico, Schaffner, no. 35; Chinantla, 
Liebmann, no. 413 ; Boerego near Orizaba, Bourgeau, no. 3149; Mt. 
Orizaba, altitude 4,000 feet, Seaton, no. 126, and altitude 10,000 feet by 
‘ame collector, -no. 168; also in Orizaba, Hahn, no. 2692, Bilimek, no. 
544, and Botteri, nos. 620, 803; Jalapa, Th. Coulter, no. 334, in part. 
Pad Var. epapposa, HBK. Closely similar in foliage and habit: achenes 
Wholly destitute of pappus. — HBK. fide DC. Prodr. v. 669. — Near 
anta Rosa, ace. to HBK. 1. c.; also San Luis Potosi, Parry & Palmer, 
no. 497 ; Las Canoas in the same state, Pringle, no. 3672; Valley of 
Mexico near the Santa Fé, Bourgeau, no. (18; Jalapa, Th. Coulter, no. 
334, in part, and near Reyes, Oaxaca, altitude 6,700 to 10,000 feet, Z. 
W. Nelson ; also Mexico without locality, 7h. Coulter, no. 250, in part 
(the other part of the same number being a Hupatorium) ; fl. August to 
October, : 
Var. longifolia, (Lag.) Gray. Leaves lanceolate or lance-oblong, 
Opposite or ternate, relatively much narrower and more elongated ; the 
lower 3 to 6 inches long: scales of the involucre yellow: pappus none. 
—~ Expe. Am. Acad. xxii. 430, as to syn. ' Calydermos longifolius, Lag. and 
Pl. Hartw. Calydermos scaber, var. Benth. Pl. Hartw. 346. — Bolaiios, 
Hartweg, no. 122, at least as to long-leaved specimens. 
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