[Vor. 1 
412 | ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Sclerocarpus elongatus (Greenm.) Greenman & Thompson, 
comb. nov. 
S. Schiedeanus var. elongatus Greenm. Proc. Am. Acad. 32:309. 
1897. 
Herbaceus; caule tereti ramoso erecto vel adscendenti 1-1.5 
m. alto striato sparse strigoso plus minusve purpurascenti basi 
lignescenti; foliis brevipetiolatis trinerviis inferioribus oppositis 
superioribus alternis anguste lanceolatis 2.5-13 em. longis 0.3- 
1.5 em. latis acuminatis acutis integris vel remote denticulatis 
basi in petiolum gradatim angustatis supra tuberculato-hispidis 
subtus paulo pallidioribus seeundum nervos venasque hirsutis; 
inflorescentiis laxe panieulatis, pedunculis gracilibus 0.5-8 cm. 
longis strigosis; capitulis 6-8 mm. altis; involueris subeampanu- 
latis circiter 5 mm. altis, squamis biseriatis oblongo-lanceolatis 
ovatis vel subobovatis extus strigoso-pubescentibus ciliatis 
leviter atratolineatis; flosculis liguliferis 5-8, ligulis oblongis 
6-10 mm. longis flavis; floribus disci circiter 30; achzeniis matur- 
itate obliquis striatis glabris. 
Specimens examined: 
Mexico: State of Morelos, fields around Cuernavaca, altitude 
1585 m., 31 October, 1896, C. G. Pringle, 6606 (Mo. Bot. 
Gard. Herb.), со-түрЕ; valley, near Cuantla, altitude 1370 
m., 28 October, 1900, C. G. Pringle, 9061 (Mo. Bot. Gard. 
Herb.). State of Vera Cruz, Ojapa, 30 June, 1910, C. R. 
Orcutt, 5156 (Mo. Bot. Gard. Herb.). 
Venezuela: without definite locality, A. Fendler, 685 (Mo. Bot. 
Gard. Herb.). 
А further study of co-type material of this species, supple- 
mented by subsequent collections, and a careful comparison of 
it with S. Schiedeanus (DC.) Benth. & Hook. f., as represented 
by Schiede’s number 225 preserved in the herbarium of the 
Missouri Botanical Garden and Pringle's number 8338 from the 
type locality, shows several important differences between the 
species and the plant referred to it as variety elongatus. Тһе 
latter has narrowly lanceolate leaves, a much-branched stem, 
open inflorescence, and more numerous and smaller heads which 
altogether indicate that the plant in question should be regarded 
as of equal specifie rank rather than a variety of S. Schiedeanus, 
hence it is here raised to specific rank and a somewhat amplified 
description is appended. 
