MACLOSKIE I COMPOSITVE. 777 



vohicre cylindrical, its scales obtuse, mucronate, imbricate, lax, shorter 

 outwards. 



(Eastern U. S.) ; N. Patagon., by Rio Negro. 



* 



7. EUPATORIUM SAUCECHICOENSE Hier. 



Fruticulose, ascending, 35-50 cm. high, and branching, sulcate-striate 

 and leafy to the panicle. Leaves alternate or subopposite, sessile; the 

 upper linear-entire, spinulose, 20 mm. by 7 mm., the lower once or nearly 

 twice pinnatifid, outline triangular to semicircular, segments 1-3 pairs, 

 linear. Racemes subsecund, panicled. Heads on 23 mm. pedicels, nod- 

 ding, 5-6-flowered. Involucre campanulate, 5 mm. long, with 12 scales 

 in 3-4 series ; inner scales acute, rufous upwards ; smaller outwards ; all 

 scarious, gland-ciliate. Pappus-setce 50. Achenes rough, 5-angled. 



(From Bahia Blanca northwards) ; N. Patagon., rare, high up by the 

 Rio Negro. Fragrant ; flowers pale lilac to pink. 



8. Eu. SUBHASTATUM Hook. & Arn., 1835. (E- bartsieefolium DC., 1836.) 



Pubescent-scabrous. Leaves alternate and opposite, mostly erect, sub- 

 hastate-lanceolate, and ovate, shortly acuminate, coarsely serrate, sessile 

 below, very rugose and tomentose. Corymbs dense, in a many-flowered 

 glomerule. Involucre short-cylindrical; its scales ovate, obtuse, striate, 

 with erect, pubescent apex. 



(Argentina) ; N. Patagon. (near Rio Negro). 



4. WILLUGB^A Neck. (1790). (Mikania W., 1804.) 



Twining herbs (rarely in the tropics, erect shrubs), with opposite, pet- 

 ioled leaves and discoid, whitish, 4-flowered heads. Involucre oblong, of 

 4 subequal, narrow scales. Corolla slender, regular. Anthers apically 

 appendaged, basiobtuse. Style-branches long, acutish. Pappus copious, 

 i-2-seriate, capillary, rather rough. Achenes truncate, 5-angled. 



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



Species 150, Amer. 



i. W. SCANDENS (L.) Ktze. Climbing Hempweed. 

 Subglabrous, twining over bushes, 2 meters long. Leaves ovate to 

 hastate, basicordate, acuminate. Heads in compound clusters, ending the 

 branches, white to pink, 6 mm. long. 



