STAJ^DLEY TREES AND SHRUBS OF MEXICO 1581 



Vernonia karwinskiana Hort.; Kunth & Bouche, Ann. Sci. Nat. III. Bot. 11: 

 228. 1849, as synonym. Not Vernonia karvinskiana DC. 1836. 



Oaxaca; type collected between Guanajuato and Villalpando. 



Shrubby; stem densely subtomentose-pilose, narrowly winged; leaves alternate 

 elliptic to ovate, 5 to 9.5 cm. long, 1.5 to 3.5 cm. wide, acute, sessile, entire or 

 callous-denticulate, densely and rather softly pubescent but green or greenish 

 above, densely and canescently silky-tomentose beneath; heads several or numer- 

 ous, cymose-panicled; pales with erect acuminate tips; rays about 2 mm. long. 

 "Ich-peyotl" (Reko). 



31. Verbesina oncophora Robins. & Seat. Proc. Amer. Acad. 28: 109. 1893. 

 Verbesina virgata conyzoides DC. Prodr. 5: 616. 1836. 



Verbesina conyzoides Moc. & Sesse; DC. Prodr. 5: 616. 1836, as synonym. 

 Not V. conyzoides "Trew, 1769." 



Mexico and Morelos; type from Sierra de las Cruces, State of Mexico. 



Shrub 2 to 3.5 meters high; stem cinereous-puberulent; leaves alternate, rarely 

 partly opposite; petioles 1 to 2.5 cm. long, naked, bearing at base a pair of corky, 

 usually deciduous auricles; blades elliptic-oblong or oblong-ovate, 6 to 18 cm. 

 long, 2.5 to 6.3 cm. wide, acute or acuminate at each end, serrulate, rough above, 

 cinereously or subcanescently tomentose-pilosulous beneath; heads numerous, 

 cymose-panicled, short-pediceled; involucre 2.5 to 3.5 mm. high, the phyllaries 

 ovate or oblong, obtuse to acute; pales blunt or with short erect mucros; rays 

 about 3 mm. long. 



32. Verbesina virgata Cav. Icon. PI. 3: 38. pi. 275. 1795. 

 Verbesina salicifolia H. B. K. Nov. Gen. & Sp. 4: 205. 1820. 

 Zacatecas to Oaxaca; type from Mexico, without definite locality. 

 Shrubby, up to 2.5 meters high; stem puberulous; leaves sessile or short- 



petioled, at base usually with corky auricles or decurrent on the stem, the blades 

 lanceolate or lance-oblong, 6 to 16 cm. long, 1 to 3 cm. wide, acuminate, usually 

 rounded at base, serrate or serrulate, smooth or smoothish above, sparsely 

 puberulous or pubescent beneath; heads numerous, in a usuall}^ concave panicle; 

 involucre about 5 mm. high, the phyllaries obtuse to acuminate; pales with 

 recurved cusps; rays 4 to 6 mm. (rarely 1 cm.) long. 



33. Verbesina serrata Cav. Icon. PI. 3: 7. pi, 214. 1795. 



Durango to Jalisco and Hidalgo; type from Mexico, without definite locality. 



Shrub 1 to 1.5 meters high; stem sparsely or densely pubescent; leaves opposite, 

 very rarely alternate or ternate; petioles 5| to 10 mm. long; blades ovate or lance- 

 ovate, 5 to 12 cm. long, 2 to 7 cm. wide, acuminate, cuneate to rounded at base, 

 sharply and usually coarsely toothed, green and rough above, beneath paler, 

 densely cinereous-pilose or hirsute-pilose and usually prominently reticulate; 

 heads usually numerous, cymose-panicled; involucre 4 to 7 mm. high, subequal, 

 the phyllaries mostly oblong or obovate, herbaceous, obtuse; pales acute, erect- 

 tipped; rays about 5 mm. long. "Palo cenizo" (Michoacdn) ; "vara blanca" 

 (Guanajuato). 



33a. Verbesina serrata pringlei (Robinson) Robins. & Greenm. Proc. Amer. 

 Acad. 34: 553. 1899. 



Verbesina pringlei Robinson, Proc. Amer. Acad. 27: 175. 1892. 



Jalisco and Michoacdn; type from Guadalajara, Jalisco. 



Similar; leaves triangular-ovate in outline, coarsely incised-toothed or lobed. 

 33b. Verbesina serrata amphichlora Robins. «fe Greenm. Proc. Amer. Acad. 

 34: 553. 1899. 



Known only from the type locality, between Ramos and Inde, Durango. 



Leaves lance-ovate, finely appressed-puberulent and bright green on both 

 sides. 



