480 PATAGONIAN EXPEDITIONS I BOTANY. 



13. AC/ENA L^VIGATA Ait. 



Smooth, decumbent. Ascending branches leafy. Leaflets opposite, 

 oblong, obovate, obtuse, oblique at base, crenate-dentate above, cori- 

 aceous, smooth on upper surface, hairy underneath. Scape with cylin- 

 drical terminal spike, and others globular. Calyx glabrous. Stamens 2, 

 filaments short, anthers rounded. Stigma short, fimbriate. Fruit gla- 

 brous, compressed, with 4 erect, unequal spines. 



Patagon., N. and S. ; Magellan, Fuegia to Hermite I. ; Falklands. 



14. A. LUCIDA Vahl. 



Loosely pilose. Stem long, decumbent, branching. Leaflets 8-9 pairs, 

 3-5-parted, villous beneath, the segments oblong to linear-. Peduncles 

 short, stout. Spikes ovate-oblong. Stamens usually 2. Fruit tetragonal 

 with tubercles above on the angles, externally pilose. 



Magellan, E. Fuegia (Ansorge, Dusen) ; Falklands, " on rocks near the . 

 sea." 



15. A. MACROSTEMON Hook. f. 



Stem rather simple, 30 cm. high, leafy. Leaflets 5-7 pairs, silky, mostly 

 sessile, decurrent, crenate-toothed. Scape long, sparingly pilose, having 

 a large, globose head. Calyx pilose, its lobes oblong-obovate, silky. 

 Filaments long, anthers large, oblong. Style long, plumose. Fruit 

 having 2 spines twice as long as the others. 



(Chili ; Mendoza) ; S. Patagon. by Puerto Deseado. 



1 6. A. MAGELLANICA Vahl. 



Abortively dioecious? Stem short, branches ascending. Leaves sub- 

 coriaceous, silky beneath. Leaflets 3-7 pairs, broad-ovate-oblong, obtuse, 

 upper ones decurrent, crenate-serrate or cleft. Scape naked or rarely i- 

 leaved, pubescent. Heads small, dilated after flowering. Calyx broad, 

 pilose. Stamens 4, long ; anthers large, didymous. Style long, broad, 

 plumose. Spines long, unequal, glochidiate. 



Heads never divided. The hairy peduncles and broad styles distin- 

 guish it from A. adscendens. 



Magellan, Cape Gregory, etc. S. Patagon., on pampas near Rio Coy. 

 (Hatcher, in fruit Dec. 17, 1896.) 



