238 GLEASON: TAXONOMIC STUDIES IN VERNONIA 
Vernonia gnaphaliifolia platyphylla var. nov. 
Leaf-blades broadly elliptic-ovate, less than twice as long as 
wide, flat, not revolute at the margin, closely and finely gray- 
tomentose beneath; otherwise resembling the typical form of the 
species. 
Type: Britton, Cowell, and Shafer 12,033, collected at En- 
senada de Mora, Oriente, March 26-29, 1912, and deposited in 
the herbarium of the New York Botanical Garden. It is described 
as a shrub, one meter high, and is the only broad-leaved representa- 
tive of the species so far known from eastern Cuba. It is also the 
only specimen examined within the species without the revolute 
leaf-margin and with distinctly tomentose pubescence. 
VERNONIA ICOSANTHA DC. 
Ekman has pointed out the peculiar nomenclatorial confusion 
attached to this well-known species of the Lesser Antilles, and 
has chosen to apply to it the name Vernonia arborescens (L.) 
Sw. In describing Conyza arborescens, Linnaeus had before him 
not only the plate of Plumier, portraying the Vernonia of the 
Lesser Antilles, but also an actual specimen of a different species 
from Jamaica. A comparison of his text with the plate shows 
that the description could not have been taken from the plate 
alone, but was based primarily on the specimen. The latter 
accordingly becomes the type of the species and retains the specific 
name arborescens, and V. icosantha remains the first valid name for 
the species of Martinique and Guadeloupe. 
Vernonia Shaferi sp. nov. 
Stem shrubby, 1-2 m. high, the young branches closely 
cinereous-pubescent, becoming glabrate the second year; leaf- 
blades ovate-lanceolate or elliptic, the largest 4 X 12 cm., the 
upper much smaller, all acuminate, entire, acute at the base, 
dark green, minutely papillose-pubescent, and very sparsely 
resinous-dotted above, paler green but otherwise the same below; 
heads about eighteen-flowered, crowded in leafy secund cymes at 
the ends of the branches of the season; bracteal leaves oblong OF 
oblong-ovate, acute, 5-10 mm. long; involucres broadly tur binate 
to campanulate, 6 mm. high, the scales rather closely imbricate, 
erect or appressed, narrowly oblong-lanceolate, acuminate, ree” 
ularly pubescent and ciliate, and usually resinous towa 
