JOURNAL 
OF THE 
WASHINGTON ACADEMY OF SCIENCES 
Vou. 13 Aprit 19, 1923 No. 8 
BOTANY.—New composites from Salvador. S. F. Buaxz, Bureau of 
Plant Industry. 
The extensive botanical collections made in Salvador in 1921-22 
by Mr. Paul C. Standley of the U. S. National Museum contain three 
new species of Asteraceae, which are described below. The new 
genus Rensonva is the first known Central American representative 
of a small group of the subtribe Melampodinae which has hitherto 
consisted of the medium-sized genus Silphiwm of the United States, 
the monotypic Schizoptera of Ecuador, and the small genus Moonia 
of Australia, India, and Ceylon. The new species of Zexmenia is 
also interesting from a geographical point of view, as its nearest 
relative is a Brazilian species. . 
Vernonia standleyi Blake, sp. nov. 
Shrubby, 1 to 1.6 meters high, branched above, the branches sometimes 
supra-axillary; stem stoutish, sometimes zigzag, grayish-barked, striatulate, 
sessile-glandular, puberulous above, glabrate below; leaves alternate; petioles 
naked, puberulous, 2 to 5 mm. long; leaf blades elliptic-oblong or elliptic, 
6 to 9 em. long, 1.3 to 3 cm. wide, acuminate, acutely or acuminately cuneate 
at base, subentire or serrulate with about 15 pairs of small acute teeth, firm- 
papery, above dotted with sessile yellowish glands, finely puberulous, gla- 
brate except along the veins, beneath paler green, gland-dotted and not 
densely short-pilose with flexuous hairs, more or less glabrescent except along 
the nerves, featherveined, the lateral veins about 6 pairs, prominulous be- 
neath, the veinlets few and prominulous beneath; heads discoid, 5-flowered 
(rarely 4-flowered), 8 mm. high in fruit, numerous, sessile or subsessile in 
dense rounded clusters 1 to 3 cm. thick at tips of branches and stem and on 
short axillary branchlets; involucre 5 or 6-seriate, graduate, 4.5 mm. high, the 
outermost phyllaries ovate, the middle ones ovate-oblong, the innermost 
linear and deciduous, all indurate and whitish, greenish along costa above, 
obtuse to acutish, the innermost glandular on back and sparsely arachnoid- 
ciliate, thin-margined, the others glandular and more or less villous dorsally 
and densely arachnoid-ciliate; corollas whitish (?), hispidulous especially 
on tube, 5.5 mm. long (tube 2.5 mm., throat 0.5 mm., teeth 2.5 mm.) ; achenes 
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