774 PATAGONIAN EXPEDITIONS I BOTANY. 



der, obtuse. Achenes linear-compressed, 4-5-angled. Pappus of 5-10 

 pales or awns, often differing in the same head, or very small. 



(Fig. in Eng. & Prantl, iv, 5, p. 134, L-O.) 



Species nearly 100, in trop. Amer. ; numerous in Central Amer. ; also 

 in Argentina. 



i. STEVIA MULTIARISTATA Spreng. 



Glandular-pubescent herb. Leaves alternate, linear-canaliculate, sub- 

 entire, hoary underneath. Peduncles subracemose, i -headed. Pappus 

 of many awns, exceeding the corolla. 



(Montevideo) ; N. Patagon., by Rio Negro. 



2. S. SATURELEFOLIA Sch. Bip. (DC. sub Nothites.'} 

 Erect undershrub, pubescent. Leaves nearly opposite, sessile, linear, 

 entire, obsoletely woolly, 25 mm. by 3 mm. Corymbs terminal. 

 (Montevideo) ; Brazil to Isla Verde south of Bahia Blanca. 



S. SATUREI/EFOLIA PATAGONICA 



Leaves less densely puberulous. Dichasium corymbose, densely 

 crowded at the ends of the branches. Involucre longer (8-9 mm.). 

 Pappus setae purplish above. 



(Argentina); N. Patagon., by Rio Negro, "extending through North 

 Patagonia." (J. Ball.) 



S. SATUREI^EFOLIA ANGUSTIFOLIA Baker. 



Leaves 25 mm. long, by 2-3 mm. wide. 



N. Patagon. (?). 



3. EUPATORIUM Linn. 



Herbs or shrubs, mostly with opposite, entire or toothed leaves, and 

 purplish to white, mostly midsized, homogamous heads of i-ioo (mostly 

 numerous) flowers. Invohicral bracts many-seriate, slightly unequal, al- 

 ways more than 5. Receptacle naked. Corollas narrow, their limb not 

 greatly enlarged. Anthers apically appendaged, basally obtuse. Style- 

 branches long, obtuse. Pappus i -seriate, of many, slender or stiffish, 

 smooth to barbellate bristles. Achenes truncate, 5-angled. 



(Fig. in Eng. & Prantl, iv, 5, p. 139, A.) 



Species 400, American, especially tropical. Few in Eurasia and trop. 

 Africa. 



