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Orthopappus is the only genus of the group Zlephantopeae in 
which the pappus consists of numerous simple bristles. In the other 
genera they are limited in number, and more or less modified into 
scales at the base, or twisted and contorted towards the apex, or dis- 
posed in two evident series. So far as known the genus includes but 
one species, O. angustifolius, which however is very variable and 
may include several distinct forms. 
The first recognition of the generic rank of the species was 
by Lessing, who included it, under the synonym £. guadriflora, 
in his new genus Zlephantoszs. The first species described in that 
genus was Llephantoszs bzflora, which must remain as the type, 
and to which the name still applies. Alephantoszs bifiora Lessing 
has a biseriate pappus, the scales of the outer series short and per- 
sistent, those of the inner long, flat, slightly twisted, and deciduous. 
The achenes of both species were figured by Lessing, and show the 
distinguishing characters well. In the same paper Lessing also de- 
scribed Hlephantopus angustifolius Sw. The description agrees 
throughout with that of Alephantosts guadrifiora, and his error 
was certainly due to the immature achenes of his specimens of Z. 
angustifolia. De Candolle followed Lessing in the use of the 
genus Llephantoszs and included in it Swartz’s Alephantopus an- 
gustifolius without recognizing its identity with Alephantoszs 
guadrifiora. Schultz, in Linnaea 20: 517 (1847), left Elephan- 
topus angusttfolius in Hlephantosis, which he regarded as a sec- 
tion of Llephantopus, and created the new section Zlephantopsis 
for Lessing’s Llephantosis biflora. In the last treatment of the 
genus C. F. Baker (Trans. Acad. Sci. St. Louis 12: 43. 1902) 
also includes Elephantopus angustifolius under Elephantosés, 
and is obviously in error when he states (page 45) that it is the type 
of the genus. 
As a matter of fact the name Zlephantosis belongs to EZ. biflora, 
and Elephantopsis is merely a synonym. Accordingly Elephan- 
topus angustifolius of Swartz, here considered generically distinct, 
is left without a generic name, for which Orthopappus is now 
proposed. 
Orthopappus angustifolius (Sw.) nom. nov. 
Elephantopus angustifolius Sw. Prodr. Veg. Ind. Occ. 115. 
88 
1788. 
Elephantopus nudifiorus Willd. Sp. Pl. 3: 2390. 1804. 
