MACLOSKIE I COMPOSITE. 803 



3. BACCHARIS CHUBUTENSIS Speg. 



Stem leafy, glabrous, with erect, subsimple branches, having 3 broad, 

 remotely interrupted wings. Leaves sessile, elliptical or ovate. Heads 

 mostly apical, rather large, few-glomerulate on the central branchlet. 

 Involucral scales acute. Achenes 6-costate, minutely and closely papillate. 



Rootstock woody, thick, nodose ; branches 20-50 cm. tall. 



Patagon., Chubut, in swampy mountain meadows. 



4. B. CONFERTA H. B. & K. 



Glabrous, branching plants, subviscous at the apex ; branchlets decurrent, 

 angular. Leaves sessile, obovate-oblong, 10-14 mm., acute, basi-cuneate, 

 a tooth on each side near apex, nearly veinless. Female heads terminal, 

 crowded, subsessile. Invohicral scales lanceolate, the inner ones acumi- 

 nate, at length squarrose. Achenes striate, glabrous. 



(Mexico) ; Falklands. 



5- B. CONFERTIFOLIA Colla. 



Shrub, from puberulous becoming glabrous, slightly viscid. Branchlets 

 terete. Leaves linear, elongate, attenuate-petiolate, acute, coarsely toothed- 

 serrate to entire, 3-nerved. Heads many on ends of the branches. In- 

 volucres ovate, their scales lanceolate, scarious, stramineous, glabrous ; of 

 the male oval-oblong, obtuse ; of the female acute. 



(Chili) ; N. Patagon., by Lago Nahuel-huapi. 



(B. cuneifolia Lam. sub B. magellamca.} 



(B. cylindrica DC. sub B. genistelloides.} 



6. B. DARWINII Hook. & Arn. 



Suffruticose, erect, puberulous ; branches angulate-striate. Leaves 

 remote, linear, canaliculate, subcarnose, obscurely i -nerved, entire, end- 

 ing in a hair or a soft mucro. Head solitary, terminal on subcorymbose 

 branchlets. Involucre hemispherical, its scales obsoletely i -nerved, 

 lanceolate, acuminate, the margins broadly scarious, entire. 



Patagon., by Rio Negro; Golfo de San Jorge; Rio Sta. Cruz and 

 Rio Chico; Puerto Madryn (Dusen). "The South Patagonian specimens 

 are prostrate, leaves broader; those from Rio Negro are tall (50-80 cm.), 

 erect, patent-ramose, with leaves more remote and smaller." 



