E. L. EKMAN, WEST INDIAN VERNONI^E. 41 



B. Leaves narrowed at base, strigose-pubescent beneath. 

 — Guatemala — Columbia. V. Friedridisthalii. 



II. Outer scales not at all, or shortly, cuspidate. 



A. Leaves broad, elliptical, conspicuously narrowed at 

 base. 



1, Leaves velvety-pubescent beneath, especially on the 

 veins. — Yucatan. V. hirsutivena. 



2. Leaves strigose-pubescent beneath. — Central Brazil. 



V. vir ens. 



B. Leaves narrowly oblong to narrowly lanceolate, shortly 

 narrowed at base. 



L Inner scales beautifully purplish, involucres 8 — 10 

 mm high. — Mexico. V. strigosa. 



2. Inner scales not purplish. 



a. Heads distant, involucres about 7 mm high, 

 scales densely imbricated. — Peru. 



F. argyropappa. 

 ß. Heads approximated, about 6 mm high; scales 

 loosely imbricated. — Eastern Brazil. 



F. Miersiana. 



Besides this, there are well-marked differences in the 

 structure of the flowers and the pappus. However, I have 

 had a rather scanty material to examine, and the differences 

 found thus cannot be published here. 



The names F. Friedrichsthalii and F. strigosa are not 

 to be considered as published in this paper. 



From F. Trinitatis, or some closely related species, F. 

 arhorescens (L. ) Sw. may have originated. Especialh^ the spe- 

 cimen collected by Lockhaut greatly resembles this species. 



2. The allies of Vernonia arborescens (L.) Sw. 

 Yernoiiia arborescens (L.) Sw. 



Tabula nostra II, fig. 1 (cyma). 



Conyza arhorescens Linn^us, 1759 a, p. 1213; 1763, p. 1209, excl. syn. 

 Beownei et Sloanei. 



Vernonia arborescens Swartz, 1806, p. 1320, quoad typum Linn.ei, baud 

 quoad descript., nee patriam. 



Lepidaploa arborescens »Cass.» ap. Lessing, 1829, p. 302 (ap. Cassini 

 1823, nomen non inveni}, quoad tj'pum Linn.5:i. 



Vernonia divaricata Lessing, 1829, p. 306 — non Sw. 



