STANDLEY TREES AND SHEUBS OF MEXICO 1417 



29. Vernonia oolepis Blake, Contr. Gray Herb. n. ser. 52: 20. 1917. 

 Eremosis oolepis Gleason, N. Amer. Fl. 33: 97. 1922. 



Yucatdn; type from Izamal. 



Shrub, the stem densely pilose-tomentose, subglabrate; petioles 2 to 4 mm. 

 long; leaf blades oval-lanceolate or obovate-lanceolate, about 7 cm. long, 2.8 

 cm. wide, acuminate at each end, glabrous above, densely and sordidly pilose- 

 tomentose beneath, the veins about 5 pairs, obscure; heads subsessile, 4-flowered; 

 involucre 5.5 mm. high, the phyllaries pale, rounded at apex, ciliate; achenes 

 sparsely pilosulous, blackish brown. 



30. Vernonia palmeri Rose, Contr. U. S. Nat. Herb. 1: 101. 1891. 

 Eremosis palmeri Gleason, Bull. N. Y. Bot. Gard. 4: 233. 1906. 

 Vernonia chacalana Blake, Contr. Gray Herb. n. ser. 52: 19. 1917. 

 Sonora to Durango and Tepic; type from Alamos, Sonora. 



Shrub 5 meters high or less, the stem densely cinereous-tomentulose; petioles 

 3 to 18 mm. long; blades elliptic, elliptic-oblong, or oblong-lanceolate, 6 to 18 

 cm. long, 1.5 to 5.5 cm. wide, remotely serrulate, beneath densely griseous- 

 tomentulose or pilosulous, or sometimes glabrescent except along the veins; 

 heads 3 (rarely 4 or 5) -flowered; involucre whitish or sometimes purplish-tinged, 

 the phyllaries more or less ciliate; achenes pubescent." Tacotillo" (Sinaloa). 



31. Vernonia barbinervis Schultz Bip. in Seem. Bot. Voy. Herald 297. 1856. 

 Eremosis barbinervis Gleason, Bull. N. Y. Bot. Gard. 4: 232. 1906. 

 Sinaloa; type from the Sierra Madre of northwestern Mexico. 



Shrubby, about 3 meters high, the stem subglabrous; petioles 1 to 1.5 cm. 

 long, obscurely puberulous; leaf blades oval, 8 to 12 cm. long, 4 to 5 cm. wide, 

 rounded to subacute, cuneate at base, subglabrous above, densely pubescent 

 along costa beneath, at- least when young, and tufted in the axils of the veins; 

 heads 3-flowered; involucre whitish or brownish-tinged, the phyllaries broadly 

 ovate to oblong-ovate or oblong, acute and often apiculate. "Tacotillo" 

 (Sinaloa) . 



32. Vernonia triflosculosa H. B. K. Nov. Gen. & Sp. 4: 40. 1820. 

 Gymnanthemum congestum Cass. Diet. Sci. Nat. 20: 110. 1821. 

 Vernonia triantha Schauer, Linnaea 19: 714. 1847. 



Vernonia luxensis Coulter, Bot. Gaz. 20: 41. 1895. 



Vernonia dumeta Klatt, "Leopoldina Bot. Beibl. 1. 1895." 



Colima to Costa Rica; type collected near Acaguisotla, Guerrero. 



Shrubby or arborescent, the stem cinereous-tomentulose, glabrescent; petioles 

 5 to 10 mm. long; leaf blades elliptic or oblanceolate, 5.5 to 12 cm. long, 1.3 to 

 3 cm. wide, subglabrous above, subglabrous to thinly tomentulose beneath; 

 heads 3-flowered; involucre whitish, 5 mm. high, the phyllaries rotund-ovate to 

 oblong, obtuse to (inner) acuminate, ciliate or ciliolate; achenes pubescent. 

 "Tubus!" (Costa Rica); "rajate luego," "sauquillo," "suquinay prieto, " 

 "barreto" (El Salvador). 



33. Vernonia heydeana Coulter, Bot. Gaz. 20: 42. 1895. 

 Eremosis heydeana Gleason, Bull. N. Y. Bot. Gard. 4: 234. 1906. 



Southern Mexico. Guatemala; type from San Miguel Uspantdn, Department 

 of Quiche. 



Shrubby, the stem puberulent or glabrate; leaves elliptic or ovate, 8 to 10 cm. 

 long, 4.5 to 6 cm. wide, acute at each end, sparsely pubescent above, thinly 

 tomentose beneath or glabrescent; involucre 6 mm. higli, the phyllaries ovate 

 to oblong-ovate, obtuse, ciliate; achenes glabrous or minutely glandular. 



