MACLOSKIE I COMPOSITE. 873 



2. BRACHYCLADOS LYCIOIDES Gill, and Don. 



Differs from B. involutes, by having scarcely half as many involucral 

 scales ; which are not acuminate nor revolute ; and by having smaller 

 heads, and the leaves nearly twice as long. 



(Andes of Mendoza) ; N. Patagon., by Rio Negro. 



3. B. MACROCEPHALUS O. Ktze. 



Low shrub, 50 cm. or more. Branches not striate, the young woolly. 

 Leaves basally 5-8 times dilated ; their dead bases persisting on the 

 branches. Heads subsessile, 3 cm. broad, 2 cm. long; yellow. Ray- 

 flowers 20 ; disk-flowers 40. Invohicral scales as B. involutes, but very 

 acute and rather rigid. 



Patagon.; Lagos, about 5oth parallel (Carl Burmeister). 



4. B. OBTUSIFOLIUS O. Ktze. 



Low, robust, 10 cm. high, densely pulvinate-branching. Leaves falcate, 

 obtuse, epiphyl glabrous, hypophyl hoary and canaliculate ; 6 by 1.3 mm.; 

 basally somewhat dilated. Heads subsessile, i cm. broad and long ; ray- 

 flowers few ; disk-flowers about 30. Invohtcral scales about 20, oblong, 

 obtuse, apiculate. 



Patagon. (M. and T.). 



5. B. PYGM^EUS O. Ktze. 



Very low, robust, prostrate, 15 cm. high ; very pulverulent, with crowded 

 branches. Leaves with widening base, woolly when young; the dead 

 bases persisting on the branches. Heads subsessile, 15 mm. long and 

 broad. Flowers smaller than in B. macrocephalus. Involucral bracts 

 15-20, acute. 



Patagon. (M. and T.). 



71. TRICHOCLINE Cass. 



Perennial, herbs, with i -headed, mostly leafless scapes. Leaves rosu- 

 late. Heads rather large, yellow, radiate. Involucre broad ; its scales 

 many-seriate, imbricate. Receptacle plane, nearly naked. Ray-flowers 

 bilabiate, disk-flowers tubular, or all ligulate. Anthers long-tailed. Style- 

 branches short, wide. Achenes 5-costate. Pappus-setcz many-seriate, 

 copious. 



Species 28, extratropical S. Amer., and Australia. 



