112 PROCEEDINGS OF THE AMERICAN ACADEMY. 



excluding the short tube 6 mm. long, 4 mm. broad ; ray-achenes slender, 

 G mm. long : disk-flowers 20 to 25 ; corolla yellow or purplish : mature 

 achenes 4 to 5 mm. long, appressed-pubescent on both surfaces, ciliate. 

 — Mexico. State of Oaxaca: 17 October, 1899, E. W. D. Hblway, 

 no. 3747 (lib. Gr.), and 25 October, 1899, no. 3740 (hb. Gr.) ; altitude 

 1750 in., July-August, 1900, Conzatti $ Gonzalez, no. 1002 (hb. Gr.) ; 

 Ocotlan, December, 1901, Conzatti fy Gonzalez, no. 1263 (hb. Gr.) ; be- 

 tween Coixtlahuaca and Tarnazulapam, altitude 2000 to 2500 m., 12 

 November, 1894, E. W. Nelson, no. 1937 (hb. Gr., and hb. U. S. Nat. 

 Mus.); Valley of Etla, altitude 1700 m., 23 October, 1895, L. C. Smith, 

 no. 854 (hb. Gr.). 



Encelia squarrosa. Perennial, 4 to 6 m. high : stem slightly 

 furrowed, tawny jmbescent : leaves opposite, petiolate, ovate, 8 to 

 15 cm. long, 5 to 8 cm. broad, acuminate, dentate, cordate, dark green 

 and hirsute-hispid above, paler and hirsute-tomentose beneath, 3-5- 

 nerved from or just above the base ; petioles 2 to 3 cm. in length : 

 inflorescence a terminal corymbose cyme: heads large, about 1:5. cm. 

 high, including the rays 5 to 6 cm. broad : involucre 3-4-seriate ; scales 

 of the involucre lanceolate, shorter than the flowers of the disk, acute, 

 strongly squarrose, thickened at the base, ciliate, pubescent on the outer 

 surface : ray-flowers neutral, about 20, yellow ; pappus of slightly un- 

 equal scales, more or less united, shorter than the triangular sterile 

 achenes; rays oblong, 1.5 cm. long, 6 mm. broad: disk-flowers numer- 

 ous ; pappus of two paleaceous awns with two or three intermediate 

 scales, persistent : achenes strongly compressed, pubescent on both sur- 

 faces, ciliate. — Mexico. State of Guerrero : mountains above Iguala, 

 altitude 1230 m., 11 October 1900, O. G. Pringle, no. 8390 (hb. Gr.). 



Helianthella quinquexervis, var. arizoxica, Gray, Syn. Fl. i. 

 pt. 2, 284. Specimens collected by E. W. Nelson, on the Sierra Madre 

 of S. W. Chihuahua, Mexico, about 95 km. south of Guadalupe and 

 Calvo, altitude 2000 to 2500 m., August, 1898, no. 4808 (hb. Gr., and 

 hb. U. S. Nat. Mus.), are clearly to be referred to the variety arizonica 

 of the above species. This variety does not seem to have been hitherto 

 reported from Mexico. 



Verbesina madrensis. An herbaceous perennial : stems 4 to 

 6 dm. high, winged below, naked or nearly so above : lower leaves 

 opposite, the upper alternate, elliptic-oblong to oblong-lanceolate, 3 to 

 10 cm. long, 1 to 4 cm. broad, obtuse, crenate-dentate, decurrent on the 

 stem, hirsute-hispid on both surfaces especially above, prominently reticu- 

 late-nerved : heads one to few, terminating the stem and branches on 



