MACLOSKIE: COMPOSITE. 805 



n. BACCHARIS GENISTIFOLIA DC. 



Glabrous, branching shrub, with striate branchlets. Leaves few, distant, 

 sessile, linear, 10 by i mm., obtuse, entire, nearly nerveless. The male- 

 heads 3-5, sessile, terminating the branches, spicate-crowded, bractless. 

 Involucre obovate, its scales ovate, acute, membranaceous-margined. 

 Habit of Genista tinctoria. Female plant? 



(Brazil; Chili; Argentina); S. Patagon., by Rio Chico. 



12. B. GILLIESII A. Gray. 



Low, glabrous, from a woody base, much branching. Branches slender, 

 striate-angled, leafy. Leaves sessile, linear-attenuate, or 2-4-toothed, i- 

 nerved ; those of the branches small. Heads solitary, terminal. Involucre 

 campanulate, the scales obtuse, scarious-margined, woolly-tipped. Pappus 

 thrice as long as the involucre. Achenes glabrous. 



(Argentina); sandhills at the mouth of Rio Colorado, near the sea; 

 and through N. Patagon. 



Var. with leaves rather long and deeply toothed. Same distribution. 



13. B. JUNCEA Desf. 



Subglaucous, glabrous herb, perennial. Stems from the collum many, 

 terete, rush-like. Leaves sessile, linear, almost nerveless, entire or minutely 

 toothed, distant. Heads terminal, solitary or few-corymbose, pediceled. 

 Involucre hemispherical, its scales lanceolate, rigid, acute, inner ones 

 linear and smaller. Achenes glabrous, 5-io-costate. Pappus copious, 

 many-seriate. 



(Brazil); Patagon., by Rios Negro and Sta. Cruz; Port Rawson. By 

 J. B. Hatcher at Rio Chico de Sta. Cruz, March, 1897, female (determined 

 by O. Hoffmann, who writes, "De Condolle writes 'folia integerrima.' 

 They are not always so. Also Baker says in the Flora Brasil., 'folia 

 interdum minute dentata.' We have collected examples like yours from 

 Sello.") The Hatcher specimen has the leaves remotely serrate. Plant 

 nearly a meter high, heads corymbed, outer involucre scales nearly ovate, 

 all chestnut colored, with whitish margins. Achenes long, ovoid, com- 

 pressed, lo-striate, rounded at top where the fine, silky, abundant pappus 

 is inserted ; pappus more than twice as long as the involucre. 



