776 PATAGONIAN EXPEDITIONS: BOTANY. 



3. EUPATORIUM MACROCEPHALUM Less. (Chrotiwlcsna pratensis Card.) 



Erect herb, with subovate, acuminate, 3-nerved, rough leaves, remotely 

 serrate, crenate upwards, and rather large head ( 1 2 mm. deep and broad) 

 with 3-seriate involucre, its scales subequal, acuminate, outside rough. 

 Corolla-tube and limb not sharply limited. Pappits plumose-serrate. 

 Achenes shining. 



(Brazil; Argent.) ; N. Patagon., near Rio Negro. "Differs from Eupa- 

 toriiim by having the achene attenuate baseward to a stipe, and the stipe 

 dilated at its base to a ring; also by its cynaroid habit. (Griseb.) 



4. EU. PATAGONICUM Klatt. 



Stem terete. Branches, petioles and peduncles pubescent-tomentose. 

 Leaves opposite, petiolate, ovate-lanceolate, 3-nerved," remotely toothed, 

 with soft, rusty pubescence on both surfaces. Panicles few-headed ; 

 their branches remote, opposite, about 2 3-headed, the heads 6 by 4 mm., 

 pediceled, bracteate, oblong, p-flowered. Involucral scales imbricate, 

 ovate-lanceolate, acute, 5-ribbed. Achenes striate, hirsute. 



Patagon., at d'Orbigny. 



5. Eu. PATENS Hook. & Arn., 1835. (Mikania tenuiflora Gris., 1879.) 



Suffruticose, much branching. Peduncles and younger branches pubes- 

 cent. Leaves opposite, ovate-oblong, rather 3-nerved, incise-pinnatifid. 

 Heads glomerate on short, opposite, spreading, leafy branches. Involucre 

 oblong, its scales few-seriate, obtuse, substriate. 



(Brazil.) 



EU. PATENS GRACILIUS (Lor.). 



Slender shrub, nearly 2 m. high, supported by other shrubs. Leaves 

 smaller than in the type, not membranaceous, rough. Heads axillary, soli- 

 tary on the petioles, or rarely crowded towards the apex, short, pale yel- 

 low, 6-7-flowered, or ochroleucous, very fragrant. 



N. Patagon, by Rio Negro. 



6. Eu. PINNATIFIDUM Ell. (E. virgatum Don.) 



Leaves mainly opposite or in 4's ; the lower twice or thrice pinnati- 

 partite, with oblong or lanceolate segments ; the upper once or twice 

 pinnate, with linear lobes. Heads small, paniculate, 5~9-flowered. In- 



