STANDLEY TEEES AND SHRUBS OF MEXICO 1415 



18. Vernonia raucronata Blake, Contr. Gray Herb. n. set. 52: 19. 1917. 

 Monosis foliosa Benth. PL Hartw. 19. 1839. 



Vernonia foliosa Schultz Bip. Pollichia 18-19: 161. 1861. Not V. foliosa 

 Gardn. 1846. 



Eremosis foliosa Gleason, Bull. N. Y. Bot. Gard. 4: 228. 1906, as to synonym. 



San Luis Potosi and Jalisco; type from Bolanos, Jalisco. 



Low shrub, cinereous-tomentose, glabrescent; leaf blades oval-ovate or ovate, 

 4 to 6.5 cm. long. 2 to 3.3 cm. wide, thin-coriaceous, entire or sparsely denticulate, 

 closely cinereous-tomentose on both sides, glabrescent above, becoming merely 

 tomentulose-puberulous beneath; involucre o to 6 mm. high, purplish, the 

 phyllaries acute to acuminate, the middle and outer with short mucros; achenes 

 densely villous. 



19. Vernonia aristifera Blake, sp. nov. 



? Vernonia steetzii callilepis Schultz Bip. in Seem. Bot. Voy. Herald 297. 1856. 



Eremosis foliosa Gleason, Bull. N. Y. Bot. Gard. 4: 228. 1906, as to description. 



Eremosis callilepis Gleason, N. Amer. Fl. 33: 98. 1922, at least as to de- 

 scription. Not V. callilepis Gleason, 1922. 



Jalisco; type collected at Rio Blanco (Palmer 678 in 1886; U. S. Nat. Herb, 

 no. 49992). 



Similar to V. mucronata; leaves mostly broadly ovate, 3.5 to 6 cm. long, 2.2 

 to 4.5 cm. wide, densely and persistently cinereous-tomentose beneath, glabres- 

 cent above; phyllaries more acuminate than in V. mucronata and with longer 

 mucros. 



20. Vernonia monosis Schultz Bip. Linnaea 20: 507. 1847, 



Turpinia ? tomentosa Lex. in Llave & Lex. Nov. Veg. Descr. 1: 24. 1824 

 Not Vernonia tomentosa Ell. 1822. 



IVernonia paniculata DC. Prodr. 5: 23. 1836. 



Monosis tomentosa DC. Prodr. 5: 77. 1836. 



Eremosis tomentosa Gleason, Bull. N. Y. Bot. Gard. 4: 229. 1906. 



Jalisco to Quer^taro; type from Mt. Quinceo, near Morelia. 



Shrubby, up to 2.5 meters high, densely cinereous-tomentose; leaf blades 8 to 

 12.5 cm. long, glabrescent above, densely cinereous-tomentose beneath with 

 loose tomentum; panicles very large; involucre purplish, 5 mm. high, tomentose 

 at base, the phyllaries acute or acuminate; achenes densely appressed-pubescent. 



21. Vernonia tarchonanthifolia (DC.) Schultz Bip. Linnaea 20: 507. 1847. 

 Monosis tarchonanthifolia DC. Prodr. 5: 77. 1836. 



Oliganthes karivinskii Schultz Bip. Linnaea 20: 505. 1847. 



Eremosis tarchonanthifolia Gleason, Bull. N. Y. Bot. Gard. 4: 230. 1906. 



Oaxaca. 



Shrub 3 to 6 meters high; stem densely cinereous-tomentose; leaf blades 6 to 9 

 cm. long, green and glabrescent above, densely cinereous-tomentose beneath; 

 involucre purplish, 6 mm. high; achenes gland-dotted and rather sparsely his- 

 pidulous. 



22. Vernonia obtusa (Gleason) Blake. 



Eremosis obtusa Gleason, N. Amer. Fl. 33: 99. 1922. 



Known only from the type locality, Minas de San Rafael, San Luis Potosi. 



Shrub; stem cinereous-tomentose, glabrescent; leaves petioled, the blades oval- 

 oblong, 5 to 7 cm. long, 2 to 3.5 cm. wide, acute, cuneate at base, entire or den- 

 ticulate, densely and loosely griseous-tomentose beneath; involucre 6 mm. high, 

 the phyllaries brown or purple, the outer ovate, obtuse or rounded, tomentose, 

 the middle and inner obtuse or rounded, ciliate, glandular above; achenes glandu- 

 lar, otherwise essentially glabrous. 



