MACLOSKIE : NYCTAGINACE^E. 375 



3. PFAFFIA Mart. 



Mostly tomentose herbs or undershrubs, with thick rootstocks, and 

 slender, erect stems ; leaves opposite, sessile or nearly sessile, generally 

 tomentose. Flowers in dense, stalked heads or spikes. Calyx 5-parted, 

 very hairy. Staminal tube long, its lobes ciliate-fimbriate. Utricle inde- 

 hiscent. 



Species 15, Brazil. (Fig. in Eng. & Prantl, iii, la, p. 116.) 



P. LANATA (Poir). (P. tomentosa Mart.) 



Tomentose undershrub. Leaves i cm. long, subsessile, oval, acute, 

 mucronulate, subrepand-dentate. Peduncle long ; heads solitary, subglo- 

 bose, sulphur-white. Sepals scarcely exceeding the lateral bracts. 



(Brazil) ; Bahia Blanca and N. Patagon. 



4. GOMPHRENA Linn. 



Branching hirsute-woolly herbs with opposite, entire leaves, and mostly 

 swollen nodes. Calyx 5-parted. Staminal tube elongated, its lobes 

 emarginate ; anthers i -celled. Stigmas mostly 2. Utricle ovoid-com- 

 pressed, indehiscent. Seed i, lenticular. 



Species 90, chiefly in Central and S. Amer., 15 in Austral. 



i. G. PERENNIS Linn. 



Leaves short-petiolate, oblong-lanceolate, attenuate below, acute. Heads 

 terminal and lateral, with 2 subfloral leaves \flowers shining pale yellowish. 



(Argentina) ; N. Patagon. (?). 



2. G. ROSEA Griseb. 



Perennial, from a descending rhizome. Stems few, subsimple, 20 cm. 

 high, strigose-woolly. Leaves lanceolate, acuminate, subsessile, equalling 

 the lower internodes. Head terminal, hemispherical. Subfloral leaves 4, 

 ovate-acuminate. Sepals woolly below, pink, oblong, linear, denticulate, 

 carinately i -nerved. Lateral bracts crestless, exceeding the calyx. Stam- 

 inal tube shortly exsert. 



(Argentina) ; probably in N. Patagon. 



