OF ARTS AND SCIENCES. 119 
fours, clasping at base: heads few, terminal and axillary, shortly pe- 
dunculate, oblong, 10 lines long; involucre of 14 or 15 bracts, oblong- 
linear, sharp pungent, 2 inches or more long, with 3 or 4 pairs of spines 
or the inner ones sometimes entire ; bractlets blue, pungent, a little 
longer than the flowers. —In pine woods, Mt. Orizaba, 12,000 ft, 
August (no. 197). Near Z. proteflorum, but with more scattered 
stem leaves, narrower radical leaves, fewer bracts, and bearing several 
heads. Galeotti’s no. 2763, which was found on this mountain at 
exactly this altitude and referred to Z. proteflorum, is in all probabil- 
ity the above plant. 
ARRACACIA NUDICAULIS, Coulter & Rose, n. sp. Acaulescent, 
glabrous, with slender peduncle, 3-12 inches high: leaves 4—7, pinnate; 
segments linear, entire or the lower ones 3-7-toothed or pinnatifid, 
the ultimate segment appendiculate: umbel somewhat unequal, 6-12- 
rayed ; rays 1-2 inches long; pedicels 2-3 lines long: flowers white: 
fruit ovate, flattened laterally, 14 lines long: stylopodium conical, 
becoming inflexed ; styles slender, thickened at tip. — Pine woods, 
Mt. Orizaba, 12,000 ft., August (no. 199). 
GNAPHALIUM POPOCATEPECIANUM, Sch. Bip. Sandy plains, Mt. 
Orizaba, 14,000 ft., August (no. 242). This plant is the same - 
Schaffher’s no. 50, Coulter’s 451*, and one collected by Galeottl. 
Also very near G. Liebmanni, Sch. Bip. (ex char.). 
IOSTEPHANE HETEROPHYLLA, Benth. Specimens of this plant 
collected in moist woods near Esperanza, 8,000 ft., August (no. 366), 
show the stem to be foliaceous to the summit and the rays dark 
red. 
VIGUIERA PEDUNCULATA. Stem erect, about 3 feet high, smooth 
ish, branched only at the summit: leaves opposite, distant, petiolate, 
coriaceous, undulate-serrulate, 3-nerved from the base, somewhat 
scabrous above, minutely pubescent on the nerves below; lower leaves 
deltoid, acute, about 3 inches long, 14-2 inches broad; the upper ovale, 
acute, cuneate at the base, 13-2} inches in length: peduncles 13 
the ends of the branches, 5-11 inches long: heads solitary, 13-13 
inches in diameter: involucre 4 lines high; the bracts lance-lineat 
apiculate, pubescent: rays 12-15, 6-8 lines long, oblong-elliptié 
minutely emarginate: bracts of the convex or subconical receP 
entire, cuspidate, about equalling the disk corollas: achenes oblong 
finely pubescent, 1} lines in length: pappus awns chaffy-dilated # 
the base, nearly as long as the achene; the intermediate palex eee : 
ate. — Wooded hills near Esperanza, 8,000 ft., August (no. 368): : 
A species well characterized by its long-pedunculate heads. 
