878 PATAGONIAN EXPEDITIONS I BOTANY. 



of sheath, subscarious, amplexicaul. Heads apical, solitary, sessile ; with 

 5 white flowers. 



Patagon., by Golfo de San Jorge. 



3. NASSAUVIA ARGENTEA Phil. 



Stems ascending, branching. Leaves imbricate all over the stem, semi- 

 amplexicaul, ovate-oblong, acute, with recurved margin and apex, their 

 upper surface parallel-impressed-striate and pubescent ; the under surface 

 with dense silvery silk. Heads crowded in a glomerule, at length leafy. 

 (Chili, Valdivian Andes, in snow) ; Chubut Mts. (" Var. of N. navalis" 

 Speg.). 



4. N. AXILLARIS Don. 



Primary leaves subulate-trigonous, cucullate-sheathing at base. Second- 

 aries fasciculate, linear-mucronate, recurved. Heads subternate. 

 (Argentina) ; Patagon. M. & T. 



5. N. BRYOIDES O. Hoffmann. (Plate XXVIII, A.) 



Dwarf skn&i branching, forming a cushion; the branches short and 

 densely leafy. Leaves close, imbricate, sessile, orbiculate, entire, pale at 

 base, green at apex, emarginate, slightly complicate. Heads sessile, sol- 

 itary at ends of some branches, radiant. Invohtcre cylindrical, of 8-10 

 scales, the outer ovate, the inner elliptic, all sparsely villous and mucro- 

 nate. Flowers 5, yellow. Achenes silky. Pappus-pales linear, silky. 



"Assumes many forms," "habit of Androsace." 



S. Patagon., in Upper Valley of the Rio Gallegos (Nordenskjold) ; by 

 Rio Chico de la Sta. Cruz (Hatcher). 



6. N. CANDOLLEI Macl. (Panargyms lagasca DC. 1838 non Caloptilium 



lag H. & A. 1835). 



Stem and leaves silky ; the leaves linear-subulate, short, revolute, sup- 

 porting the heads which are conglomerate in a terminal, hemispherical, 

 golden mass. Pappus plumose. 



S. Patagon. (by Hatcher in the Cordilleras. Feb. 11, 1897. One 

 specimen has two heads close together on a forking branch). 



7. N. CHUBUTENSIS Speg. 



Undershrub, laxly pulvinate-cespitose, branchlets long, erect, cottony 

 below, glabrate towards the apex, laxly leafy. Leaves glabrous, ovate, 



