24 PROCEEDINGS OF THE AMERICAN ACADEMY. 
a Var. livida. Leaves narrow, lanceolate to lance-oblong, very sca- 
brous-pubescent: involucral scales dark purple: pappus present. — 0. 
peduncularis, var. longifolia, Gray, as to pl. Palmer. — On the Rio 
Blanco, Jalisco, Palmer, no. 317; and in damp shady cafions near 
Guadalajara, Pringle, no. 2326 ; fl. August to October. 
C. Liebmannii, Schz. Bip. Branches terete: leaves petiolate, 
ovate-elliptic, 2 inches long, 9 lines broad, coriaceous, 3-nerved, glabrous 
above, ferrugineous and chrysopunctate beneath: heads short-pedicelled, 
6-flowered, disposed at the summits of the peduncles in umbelliform 
corymbs : involucres cylindraceous: scales 3-seriate, ovate, subreflexed at 
the apex: chaff membranaceous, ovate, acute: achenes glabrous; scales 
of the pappus 10, short. — Leopoldina, xxiii. 6. — Gualulu, Liebmann, 
no. 411. Not seen by the writers, and doubtfully referred to this subdi- 
vision. The characters are drawn from the original description of Klatt. 
* * Inflorescences more numerous, short-peduncled or sessile, together 
forming leafy panicles. 
+ Pappus-scales rather few, ovate to lanceolate, shorter than the achenes. 
++ Inflorescences lax, somewhat umbelliform: pedicels slender and relatively long, 
most of them considerably exceeding the heads in length. 
7 9. C. salmezefolia, Hemsl. 1. c. Shrub, 2 to 3 feet high, with 
yi 
rhombic-ovate leaves acute at both ends, smoothish and lucid above, 1 to 
1} inches long, half as broad: heads 8-14-flowered. — Calydermos 
salmeefolius, DC. Prodr. v. 670.— Between Tula and Tampico, Ta- 
maulipas, Berlandier, nos. 718, 2135. 
++ ++ Inflorescence denser: pedicels mostly very short, seldom equalling or exceed 
ing the heads (except in C. Zacatechichi, var. macrophylla). 
= Involucre of most or all of the heads closely subtended by a few broad obtuse 
herbaceous bractlets. 
10. C. albida, Gray. A branching pubescent shrub: leaves ovate, 
shortly petiolate, serrate, acutish at the apex, abruptly contracted at the 
broad obtuse base, scabrous above, somewhat paler and moderately pubes- 
cent below, 1 to 1} inches long, two thirds as broad: heads numerous, 
cymosely clustered at the ends of the leafy branches, on pedicels 1 ine 
lines in length, homogamous or with one or more reduced ray-flowers 5 
flowers whitish: achenes pubescent, scales of the pappus acute. — Proc. 
Am. Acad. xv. 38.—San Luis Potosi, in mountains near Morales, 
Schaffner, no. 269, and later in the same state, Parry & Palmer, n0- 
448; in fl. in August. 
4 11. C. hypoleuca. Similar in habit: leaves somewhat larget 
broadly ovate or suborbicular, sessile or very shortly petioled, scabrous 
