488 PROCEEDINGS OF THE AMERICAN ACADEMY. 
and regularly serrate near the middle and relatively narrower than in 
the nearly related MZ. frutescens, Hemsl. Iam unable to find J. arbor- 
escens represented in any of the many recent Mexican collections. 
_7 Calea Pringlei. Stems terete, 6 to 9 dm. high, in dried state striate, 
dull brown, covered with a fine spreading or slightly reflexed tomentum — 
of sordid color, and on young parts somewhat glandular ; branches op- 
posite: leaves broadly ovate to nearly orbicular, sessile, acute, coarsely 
dentate (1 to 1} teeth to the centimeter), ragose and scabrous-puberulent 
above, paler green, reticulate veiny, and covered with a fine white erisped 
pubescence beneath: heads 8 mm. long, 3 mm. in diameter, about 10- — 
flowered, borne on pedicels 2 to 5 mm. long in opposite-branched com-— 
pound umbelliform cymes; scales of the cylindrical involucre pale 
yellow, striate, very unequal, rounded at the tip, the outer sparingly id 
pubescent, small, not foliaceous nor even herbaceous ; pales erose, nearly 
or quite glabrous: corolla nearly glabrous but covered with transparent — 
globules, the proper tube slender and somewhat contracted to the summit 
where it suddenly expands into the very short throat and deeply cleft 
limb of five linear segments: achenes slender, somewhat attenuate 
toward the base, dark-colored with a violet tinge, appressed-pubescent 5 . 
pappus scales about 1 mm. long, also purple-tinged. — Collected by C. G. F 
Pringle on mountains above Iguala, Guerrero, Mexico, altitude 1,230 my 
24 October, 1900, no. 8373. Type in herb. Gray. 
CALEA ZACATECHICHI, ¢ Schlecht., var. calyculata. Involucre. sub- 
tended at the base by 2 or 3 herbaceous-tipped bracts; these usually 
shorter than but sometimes exceeding the inner scarious scales. “ 
Mexico, Nuevo Leon in the Sierre Madre near Monterey, C. @. Pringle, 
no. 2224, 16 July, 1888; also in the same locality, O. & EZ. Seler, 1% 
1080, 12 October, 1895. 
