204 PROCEEDINGS OF THE AMERICAN ACADEMY 



culatis 25-40-floris: involucro lin. 3-4 alto subcampanulato, bracteis 

 gradatim imhricatis acutis vel apiculato-acumiuatis ; pappi setis lin. 3 

 lou'Tis, squamuUis exterioribus diam. aclieuii baud excedeutibus. — 

 V. liatruides, Gray in coll. Ervendb., Proc. Am. Acad, v. 181, excl. syn. 

 & pi. Coult. — Mexico ; near Tautoyuca, Ervendberg. Near Monclova, 

 Palmer, no. 750. Apparently also near Monterey, Gregg. V. liatroi- 

 des, DC. (wbich, according to Schultz Bip., is also his K. Ehrenbergi- 

 ana), has much more numerous, smaller, and fewer-flowered heads, and 

 mostly broader leaves more rugosely veiny beneath. 



Vernonia Schaffneiu. Lepidaploa, herbacea, scaberula, 1-2- 

 pedalis : foliis ovalibus oblongisque (obtusis) basi acutis ; capitulis 

 paucis subumbellato-cymosis longiuscule pedunculatis circa 40-floris ; 

 involucro hemisphajrico lin. 4—5 alto, bracteis pluriseriatis oblongis 

 obtusis, extimis minimis nunc acutis ; pappi setis lin. 3 longis squamel- 

 lis brevibus consj^icuis circumdatis. — Mexico, San Louis Potosi, in 

 the mountains near Morales, Schaffner, no. 347. Coulter's no. 229 

 may be a form of the same species. 



Vernonia Greggii. Lepidaploa, herbacea, subpubescens ; caule 

 sat robusto ; foliis oblongo-lanceolatis mox scabris acutis deuticulatis ; 

 capitulis paucis sparsisve longiuscule pedunculatis circa 50-floris ; in- 

 volucro hemisphserico lin. 5 alto, bracteis pluriseriatis oblongo-lan- 

 ceolatis acutis vel acuminatis ; pappi setis lin. 3-4 longis et squamellis 

 angustissimis lineam longis. — Northern Mexico, Gregg, 1848-9, no. 

 102. 



Var. Palmeri. Capitulis majoribus ; squamellis pappi validiori- 

 bus brevioribus. — ■ Lerios, a mountain district east of Saltillo, Palmer, 

 no. 753. 



Stevia Lemmoni, Gray in Syn. Fl. ined., is fructicose, puberu- 

 lent, leafy up to the dense clusters of very numerous heads : leaves all 

 opposite, linear-oblong, obtuse, thinuish, obscurely triplinerved : in- 

 volucre somewhat viscid-pubescent : flowers apparently white : pappus 

 a cupulate and almost entire short crown. — S. Arizona, in the Santa 

 Catalina Mountains, Lemmon, 1880. 



Stevia Plummer^, Gray. 1. c, is herbaceous, puberulent and the 

 bright green foliage almost glabrous, leafy up to the dense clusters of 

 heads : leaves commonly opposite, oblong-lanceolate or broader, acute, 

 incisely serrate, very conspicuously nervose-vciiiy and reticulated, 

 hardly punctate : flowers deep rose-purple : pappus of 4 broad and 

 truncate fimbriate-denticulate paleoe. — S. Arizona, in the Rucker Val- 

 ley, Chirricahua Mountains, Mr. Sf Mrs. Lemmon, 1881. Also on the 



