( 204 ) 
As has been already mentioned the species is entirely distinct 
geographically and structurally from the southeastern V. angustz- 
folta with which it was at first associated. A sheet in the herbarium 
of Columbia Universiiy, collected by J. Reverchon at Dallas, Texas, 
is somewhat abnormal. e leaves are lanceolate, widest near the 
base, proportionately broader and more sharply toothed than in the 
type; the corymb is small and compact and the involucral scales 
merely acute. It appears to be a xerophytic form. 
68. VERNONIA ERVENDBERGI A. Gray, Proc. Am. Acad.17: 203. 
82 
Erect, 5-9 dm. high; stem angled, glabrous, branching above; 
leaves firm, lanceolate, get eee or narrowly elliptic, 5—10 
cm. long, 1-3 cm. wide, acute or acuminate, narro noe to a sessile 
base, remotely serrulate, scabrcllats above, glabrous beneath; in- 
florescence very loose and irregular; heads generally long-pedun- 
cled, 21-29-flowered; involucre broadly campanulate, or with age 
nearly hemispheric, 4-5 mm. high; scales all appressed, irregu- 
larly imbricated, glabrous or barely ciliate, lanceolate or oblong- 
lanceolate, acute or short- ane Bag ; achenes sharply ee 
sparsely pubescent, 3.5 mm ;_Pappus tawny, 5-6 mm. long, 
the outer series short, Ree ae 
Type locality: Tantoyuca and Maen Mexic 
Distribution: northwestern Mexico, from Caan south to Vera 
ruz. 
The species is quite variable in foliage, extreme forms being 
represented by Palmer 750 (cotype) with long narrow leaves ap- 
proximating those of V. zexana, and Pringle 11606, with elliptic, 
sharply and coarsely serrate leaves reaching 4 cm. in width. 
69. VERNONIA SCHAFFNERI A. Gray, Proc. Am. Acad. 17: 204. 
1882 
Erect, simple to the inflorescence, 3-5 dm. high; stem obscurely 
angled, glabrous below, pubescent above; leaves numerous, thin, 
bright-green, obovate, oblong, or broadly elliptic, 5-S cm. long, 
.5 cm. wide, obtuse, tapering to a sessile base, entire or serrulate 
toward he tip, scabrellate above, glabrous or nearly so beneath; 
vein sprominent beneath, reticulated ; upper leaves but little smaller ; 
inflorescence loose, flattened, 1 dm. wide; heads 15 or less, all 
reas about 40-flowered; involucre campanulate-hemispheric, 
7-8 . high; scales purple, all regularly and ate imbricated, 
obese or minutely ciliate, the outer lanceolate, acute, the inner 
oblong-lanceolate, obtuse or subacute ; are ies glandular- 
puberulent, 3 mm. long; pappus tawny, 6 mn 
