MACLOSKIE : COMPOSITVE. 883 



terminal, 4 cm. long. Pappus-seta linear, rather persisting. Leaf- 

 borders armed with the sharp spines. 



S. Patagon., by Hatcher in Cordilleras. (Also a specimen in Gray 

 Herb.) 



"Food of Rhea." 



(N. repens d'Urv. =N. serpens d'Urv.) 



25. NASSAUVIA REVOLUTA Gill. 



(Nasscea.} Pubescent. Leaves ovate, revolute, spinulose-serrate, at 

 length glabrate above ; costae numerous, impressed-parallel, round, con- 

 tiguous. Heads in a roundish spike. Pappus I -seriate, of linear pales. 

 (Fig. in Eng. & Prantl, iv, 5, p. 348, B.) 

 (Argentina) ; S. Patagon., at Cerro Toro (Nordenskj.). 



26. N. ROSULATA Ball. (H. & A. sub Acanthophyllum.} 



(Strongyloma.] Dwarf, cespitose, branching from the base. Leaves 

 woolly ; primary leaves broad-subulate, amplexicaul, spinescent ; secondary 

 very short and obtuse, concave, rosulate, densely covering the lower part 

 of the stem. Heads subglomerate, the lateral shortly peduncled. 



Beautiful plants, the secondary leaves forming rosiiles in the axils of 

 the primaries, which they soon obliterate, so as entirely to clothe the old 

 parts of the stem. "A stunted shrub." "It is used to make combs for 

 the Indian women." 



Patagon., by Puerto Deseado, and northward; Chubut. 



27. N. SCLERANTHOIDES O. Hoffmann. 



Low, branching shrub, the branches prostrate. Leaves imbricate, 

 appressed-silky, from a short, broad, amplexicaul sheath, suddenly atten- 

 uate to a spreading, linear, entire limb, with thick edge and pungent tip. 

 Heads solitary on ends of short axillary branches. Involucral scales, 

 outer 3-4, short, ovate ; inner longer and narrower ; all appressed-silky, 

 hyaline-edged and mucronate. Flowers 4-6. Achenes villous. Pappus- 

 Pales 3, white, caducous. (Mastigophorus, with habit of the section 

 Strongyloma. ) 



Patagon., at Puerto Madryn (Dusen). 



