554 PROCEEDINGS OF THE AMERICAN ACADEMY, 
+ + + Leaves alternate or scattered. 
++ Fruiting heads about 1 to 1.5 cm. in diameter. 
= Leaves not lepidote above. 
a. Scales of the involucre 8 to 10 mm. long: achene with a single small earlike 
wing in the manner of Otopappus, or with two very unequal wings: Mexican. 
68. V. Robinsonii, FernNaLp in herb. Otopappus alternifolius, 
Robinson, Proc. Am. Acad. xxvi. 165 (1891); O. Robinsonii, Klatt, 
Ann. Naturh. Hofmus. Wien, ix. 362 (1894).— Limestone hills, San José 
Pass, San Luis Potosi, Pringle, no. 83310. While this species possesses 
the typical pappus of Otopappus, its habit, and as we now believe its 
genetic relationship, are nearer to Verbesina. The original specific 
name, alternifolius, being preoccupied under Verbesina, the species is 
transferred under the next name. To this species may be referred, with 
some doubt, V. Humboldtii, Klatt, Leopoldina, xx. 92 (as to pl. Mex.), 
not Spreng. V. Humboldtii, Spreng. (V. helianthoides, HBK. Nov. 
Gen. & Spec. iv. 204), is supposed to be Ecuadorian and is described by 
Kunth as having leaves glabrous above, which is not the case here. 
b. Scales of the involucre about 1 cm. long: Bolivian. 
69. V. cinerea, Rusby, Mem. Torr. Club, vi. 63. — Near Cocha- 
bamba, Bolivia, Bang, no. 1092. 
c. Scales of the involucre about 7 mm. long: E. South American. 
70. V. sorpescens, DC. Prodr. y. 613; Baker in Mart. Fl. Bras. 
vi. pt. 8, 214, and var. semiserrata (=V. semiserrata, Sch. Bip. 1 
herb, acc. to) Baker, 1. c. — Brazil, Riedel, and others; Central Para- 
guay, Morong, no. 628a. 
d. Scales of the involucre 4 to 6 mm. long: wings of the achenes usually sub- 
equal: leaves serrate or serrulate: Mexican. 
1. Leaves green and closely appressed-puberulent (not scabrous) beneath. 
71. V. chiapensis. Branchlets striate, appressed-puberulent, at 
length glabrate and smooth; internodes rather long: leaves lance-oblong, 
mucronulate-serrulate, attenuate at each end, subglabrous above, scarcely 
paler and finely appressed-puberulent beneath, pinnately veined, becom- 
ing 2 dm. long, 6 cm. broad: corymb 20-30-headed, 1.5 dm. broad ; 
heads 1.2 cm. in diameter excluding the linear-oblong spreading deep 
yellow rays (8 mm. in length) ; pedicels slender, 1 to 4 cm. long, covered 
with short but copious somewhat spreading pubescence; scales of the 
involucre sub-uniseriate, ovate-oblong, acutish, 3 to 4 mm. long, much 
