MACLOSKIE: ROSACES. 481 



17. AC^NA MULTIFIDA Hook. f. 



Sparsely villous. Root woody. Stem slender, ascending, . simple or 

 divided upwards. Leaves broad-linear on slender petioles ; leaflets 

 numerous, pinnatifid, or 3-5 partite, the segments linear, obtuse, margins 

 revolute ; glabrous above, silky underneath. Peduncles 20-40 cm. high, 

 villous, sparsely leafy. Flowers crowded most of them, in a globose 

 head. Calyx hirsute, its lobes fuscous-purple, silky outside. Stamens 2, 

 short. Stigma depressed, fimbriate. Fruit tetragonal, smooth, with 

 glochidia dilated at their base, on the upper part. 



S. Patagon., in the Cordilleras (Hatcher) ; Magellan, Fuegia, passim. 

 A steppe plant, affecting dry parts. "Stouter than A. pinnatifida, fruits 

 twice as large, spines broad downwards." (Speg.) 



1 8. A. MYRIOPHYLLA Lindl. 



Erect, 15 cm. high, pubescent Leaflets 7-9 pairs, linear, pinnati- 

 partite ; segments narrow, silky beneath. Spikes cylindrical, interrupted 

 at the base. Fruit ovate, tomentose, with glochidiate spines. 



(Chili ; Argentina) ; N. Patagon. Common about the bizcacha (Vis- 

 cacha) warrens." (J. Ball.) 



19. A. NUDICAULIS Alboff. 



Erect, rough, branching, from a large rhizome. Underground branches 

 covered by old leaves. Leaves radical, ovate to oblong, short-petioled. 

 Leaflets 9-11, obovate-cuneate, pectinate, apex emarginate. Head small, 

 i cm. in diameter, globose, blackish. Stamens 4 (and 2 staminodes), 

 short. Fntit with 4 or 2 short spines. 



Fuegia, Ushuaia; cultivated. 



20. A. OVALIFOLIA Ruiz. & Pav. 



Stems creeping. Leaflets 4-5 pairs, oblong, subcuneate, villous under- 

 neath. Spikes globose. Calyx densely covered with long hairs. Sta- 

 mens mostly 2. Fruit villous, with 2-3 (-4) glochidia. 



(Peru) ; S. Patagon. (Hatcher) ; Magellan. Fuegia to Cape Horn. 



21. A. PARVIEOLIA Phil. 



Much branching, decumbent ; branches 7 cm. long. Leaves subradical, 

 small (8 mm. long) pilose ; leaflets minute, 2-partite. Peduncle filiform, 



