806 PATAGONIAN EXPEDITIONS: BOTANY. 



14. BACCHARIS MAGELLANICA Pers. (including B. cuneifolia Lam.). 



Low undershrub, glabrous-viscous, with angled branches. Leaves ses- 

 sile, crowded, coriaceous, evergreen, obovate-cuneate, obtuse, semientire, 

 with some obscurely 3-toothed. Heads solitary, sessile on ends of the 

 branches. Involucre ovate, its scales ciliate-fimbriate. Achenes glabrous, 

 striate. 



Magellan; Fuegia passim, abundant at Ushuaia ; Falklands ; Patagon., 

 by Golfo de San Jorge ; at Puerto Deseado ; by Hatcher at head of Rio 

 Chico de Sta. Cruz, Feb. 9, 1897, trie ma ^ e plant. N. Patagon., by Lago 

 Nahuel-huapi. (See note to B. patagonica.} 



15. B. MELANOPOTAMICA Speg. 



Small, glabrous undershrub, with slender, sulcate, I -headed branches. 

 Leaves alternate, lanceolate or spatulate-linear, sessile, pectinately spinu- 

 lose-toothed. Heads subcorymbose. Involucral scales 4-5-seriate, lan- 

 ceolate, acute, their margin pallid. 



(Argentina) ; N. Patagon., high places along Rio Negro ; on Rio 

 Grande (Dusen, Jan., 1896). 



16. B. MICROPHYLLA Kunth. (non DC.). 



Branching, glabrous shrub, slightly viscid, with angulate branches. 

 Leaves subsessile, cuneate, apically tridentate, coriaceous, i -nerved. 

 Female heads axillary, shortly pediceled. Involucral scales subsquarrose. 

 acutish. 



(Peru) ; N. Patagon., near Rio Negro. 



(B. montevidensis is Vernonia nitidiila Less., fide DC. Prodr., v, 29 ; 

 and Index Kewensis.} 



17. B. NANA D. Don. 



Glabrous, dwarf undershrub, 1530 cm. high ; much branching ; the 

 branches slender, wingless, sulcate. Leaves small, sessile, linear, plane, 

 i -nerved, entire or nearly so. Heads many-(3O-) flowered, solitary on 

 ends of branches. Involucre campanulate, its scales few-seriate, rigid, 

 caducous, the inner ones acute. Pappus whitish. 



(Argentina) ; N. Patagon. 



1 8. B. PATAGONICA Hook. & Arn. 



Glabrous shrub, with angulate branches, the younger ones viscid. 

 Leaves sessile, ovate-cuneate, i -nerved, thick, punctate-rugose, 3-7-toothed 



