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2. Leiboldia mexicana (Lessing) nom. nov. 
Vernonia mexicana Lessing, Linnaea 6: 680. 1831. 
? Vernonia Salvinae canescens Coulter, Bot. Gaz. 16: 95. 1891. 
Shrub with ferruginous- tomentose branches; leaves thin, obovate, 
eee short-acuminate, mucronulately serrulate, regularly taper- 
ing to the base, nearly smooth above, thinly cano-tomentose beneath, 
tomentose, fide Lessing 3. 5-5 cm. long; heads pedunculate; invo- 
lucre broadly hemispheric, 2 cm. high, 3 cm. broad; scales 
glabrous, thin, loosely ela: the outer ovate, broadly rounded 
and somewhat spreading at the tip, the inner acute or subacute, 
exposed portion of the pacipel scales 4-5 mm. wide; mature 
achenes and pappus not seen. 
Type locality: Cuesta grande de Chiconquiaco. 
Distribution: Southern Mexico. 
The single specimen examined is in the Klatt collection in the 
Gray Herbarium, and consists of a detached leaf 11 cm. long by 
5 cm. wide, and a flowering branch bearing a few peduncled heads. 
There is no indication of the date or collector, except that it ap- 
parently antedates DeCandolle’s Prodromus. If so it may possibly 
be a fragment of Lessing’s original. Specimens of Coulter’s 
variety have not been seen, and it is referred fee merely because 
of its tomentose leaves. 
3. Leiboldia Leiboldiana (Sch.-Bip.) nom. nov. 
Vernonia Leiboldiana Sch.-Bip. Linnaea 19: 742. 1847. 
Letboldia ovata Sch.-Bip. 2. ¢ 
Shr m. high, s aringly branched; stems stout, strongly 
sacied: densely cinereous-tomentose; leaves thick, subcoriaceous, 
obovate, 14-24 cm. long, 7-12 cm. wide, acute or abruptly short-acu- 
minate, sharply mucronately een — rly tapering to a rounded, 
cate, or subcordate base, dull-green and scabrous above, densely 
a softly cinereous beneath ; iateral. ves prominent; veinlets re- 
ticulated, sessile or short-petioled ; uppermost leaves much smaller; 
heads numerous, sessile or nearly so, densely aggregated; invo- 
lucre hemispheric or broadly campanulate, 16 mm. high; scales 
erect, tomentose, especially near the base, the outer ovate, the i inner 
ondary ‘termediate ribs, surmounted by a narrow callus-ring; 
pappus white, fragile, 1 cm. 
Type locality and distribution: Mexico. 
Here are referred the following exsiccatae: Bottert 6037, Prin- 
