STANDLEY TREES AND SHRUBS OF MEXICO 1583 



heads numerous, cymose-panicled, the pedicels 1 to 4 cm. long; disk in fruit 1.2 

 cm. thick; involucre 2-seriate, 3 mm. high, the phyllaries ovate or ovate-oblong, 

 obtuse to acutish; rays about 8 mm. long. 



40. Verbesina cinerascens Robins. & Greenm. Proc. Amer Acad 34- 555 

 1899. 



Known only from the type locality, near Guadalajara, Jalisco. 



Shrub 1.5 to 2.5 meters high; branchlets pilosulous; leaves alternate, short- 

 petioled, lanceolate or lance-oblong, 5.5 to 13 cm. long, 1 to 3 cm. wide, acuminate 

 at each end, serrulate or serrate, rough above, cinerascently pilosulous beneath; 

 heads rather numerous, in fastigiate cymose panicles, the pedicels 3 cm. long or 

 less; disk in fruit 7 to 10 mm. thick; involucre 3 to 4 mm. high, the phyllaries 

 ovate or oblong-ovate, acute; pales in fruit with recurved mucros; raj's 3 to 8 mm. 

 long. 



41. Verbesina crassipes Robins. & Greenm. Proc. Amer. Acad. 34: 555. 1899. 

 Oaxaca; type from Canada Santa Maria. 



Shrub; branches scabrous-tomentose; leaves alternate, sessile, obovate-lanceo- 

 late, 6 to 9 cm. long, 2 to 3 cm. wide, acute, cuneate at base, serrate, rough above, 

 beneath green and tomentulose (at least on the veins) and at length scabrous; 

 heads numerous, densely cymose, the pedicels thick and short; disk in fruit 1.5 

 cm. thick; phyllaries ovate-oblong to obovate, obtuse to acute, appressed- 

 pubescent; pales acute; rays 8 to 9 mm. long. (Description compiled.) 



42. Verbesina hypargyrea Robins. & Greenm. Proc. Amer. Acad. 34: 556. 

 1899. 



Chiapas; type collected between Hacienda Juncana and San Vicente. Guate- 

 mala. 



Shrub or tree; branches cinereous-puberulent, glabrate; leaves alternate, ses- 

 sile or petioled, lance-oblong or lanceolate, 5 to 12.5 cm. long, 1.5 to 3 cm. wide, 

 acute or acuminate, at base acuminate, crenate-serrate, green and smooth above, 

 densely silvery-strigillose beneath; heads numerous, panicled, the pedicels mostly 

 about 1 cm. long or less; disk in fruit 7 to 10 mm. thick; involucre 3 mm. high, 

 the phyllaries ovate or oblong, obtuse or the inner acutish; pales erect-mucronate; 

 rays about 4 mm. long. 



43. Verbesina persicifolia DC. Prodr. 5: 614. 1836. 



Tamaulipas, San Luis Potosi, and Veracruz; type collected between Santander 

 and Victoria, Tamaulipas. 



Shrubby; branches sparsely strigillose; leaves alternate; petioles 7 to 12 mm. 

 long; blades lance-elliptic to oblong-ovate, 7 to 14 cm. long, 1.5 to 5.5 cm. long, 

 acuminate at each end, serrate or serrulate, green and smoothish above, green 

 and glabrous beneath except for the sparsely strigillose costa and chief veins; 

 heads usually numerous, cymose-panicled, the pedicels 1 to 6 cm. long; disk in 

 fruit 1 to 1.3 cm. thick; involucre 5 to 6 mm. high, the phyllaries chiefly narrow- 

 oblong and obtuse, ciliolate, otherwise nearly glabrous; pales obtuse or shortly 

 erect-mucronate; rays about 5 mm. long. 



44. Verbesina olivacea Klatt, Leopoldina 20: 93. 1884. 

 Silphium arborescens Mill. Gard. Diet. ed. 8. Silphium no. 4. 1768. 

 Otopappus olivaceus Klatt, Ann. Naturhist. Hofmus. Wien 9: 362. 1894. 

 Verbesina arborescens Blake, Journ. Bot. Brit. & For. 53: 57. 1915. Not V. 



arborescens G6mez, 1890. 

 Tamaulipas, Veracruz, and Oaxaca; type from Hacienda de la Laguna, Vera- 

 cruz. 



Shrub 3.5 to 4 meters high; stem puberulous; leaves alternate; petioles 4 to 

 12 mm. long; blades lance-oblong, ovate-oblong, or subrhombic-ovate, 5 to 11.5 

 cm. long, 2.3 to 4.3 cm. wide, obtuse to acuminate, acuminate at base, serrate or 

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