814 PATAGONIAN EXPEDITIONS I BOTANY. 



30. LUCILIA Cass. 



Gray, woolly herbs, allied to Gnaphalium. Heads few, rather large, 

 elongated. Involucres many-seriate, their scales long, scarious. .Recep- 

 tacle naked. Flowers all fertile, the females very slender, surrounding, and 

 more numerous than, the hermaphrodites. Achenes silky, some of the 

 hairs often elongate, like an extra-pappus. 

 Species 25, S. Amer. 



L. ACUTIFOLIA Cass. 



Leaves lanceolate-linear, acute, tomentose. Pappus-set<z finely serru- 

 late. 



(Fig. in Eng. & Prantl, iv, 5, p. 184, M.) 



(Andes of Peru and Chili) ; N. Patagon., by Rio Negro. 



31. GNAPHALIUM Linn. Cudweed, Everlasting. 



Chiefly woolly herbs, with alternate leaves and discoid heads of pistillate 

 and perfect flowers. Involucral scales several-seriate, their points dry. 

 Receptacle naked. Anthers tailed. Pappus single, of capillary bristles. 

 Achenes oblong or obovate, not ribbed. 



Species 120, widely distributed. (J. D. Hooker, in Flora Antarctica, 

 questions the specific validity of many of the species.) 



KEY TO THE SPECIES. 

 A. Glabrous. 



b. Decumbent, 4 cm. Leafy at base, less so above. Heads capitate, large, antarcticum. 

 62. Undershrub, woolly upwards. Leaves small, obovate-rotund. Heads 3-5, terminal. 



serpyllifolium. 

 A2. Hoary, erect or ascending. Lower leaves broad, spatulate, upper narrower. 



b. Upper leaves subdecurrent. Floral leaves short, linear. Heads crowded, spiciform. 



spicatum. 



62. Upper leaves not decurrent. Heads in compound, axillary spikes. axillare. 



A$. Hoary- villous. 



b. Erect annual. Leaves linear or broader, acute. Spike leafy, terminal, and axillary glom- 



erules. Scales purplish-tipped. filagineum, 



b2. Slender, leafy stem. Leaves spatulate-linear-oblong. Heads 3-5, sessile in upper 



axils, as an interrupted spike. Scales dark -tipped. spidforme. 



A^. Glandular-tomentose, suffruticose, with short branches. Leaves oblong-spatulate, acute. 



Heads in compound, apical glomerules. Scales whitish. frigidum. 



A$. Woody, branching, with a tomentose cross terminating the branches. lycopodimn. 



A6. Leaves green above, tomentose underneath. Heads crowded apically. 



b. Leaves ovate-oblong, attenuate-petiolate, acuminate. Heads crowded at the top. 



mucronatum. 



