626 PATAGONIAN EXPEDITIONS I BOTANY. 



64. Leaves narrow, from broad, ciliate sheaths. Umbels short-stalked, 6-8-flowered. 



filamentosa. 



b$. Leaves linear. Umbels short, sessile amid the upper leaves. hookeriana. 



66. Leaves obovate or oblanceolate, fasciculate. Umbels nearly hidden ; involucre multifid, 



plantagtnea. 



bj. Leaves elliptical or oblanceolate, imbricate. Involucre 5-6-cleft. patagonica. 



Aj.. Leaves 3~7-cleft from a broad base with cilia, imbricating. Umbel short-stalked, 3-flow- 



ered. Involucre bracts linear. Forming cushions. selago. 



A$. Lower leaves with broad imbricating sheaths ; upper leaves 2-3-cleft. Umbel subsessile, 



6 8-flowered. Involucre cup-like, many-leaved. bolacina. 



A6. Leaves 3-lobed or 3 -cleft. 



b. Leaves crowded, amplexicaul, pectinate ; blades triangular or 3-lobed. Umbel long- 

 stalked, fuegiana. 

 bz. Leaf-lobes recurved, ciliate. Umbel subsessile ; involucral bracts subulate. 



trifurcata. 

 b$. Petioles soft, not marginally ciliate. Umbel simple, subsessile, 4-flowered and 4 involucral 



bracts. Stellate hairs on young fruit. glcbaria. 



64. Leaves recurved ; the sheaths broad, ciliate. Umbels and flowers stalked. Bracts 5-6. 



lanceolate. utriculata. 



b$. Leaves suberect with pungent points and ciliate-margined, broad imbricating sheaths. 



Umbel stalked, of 3-4-subsessile flowers, with 2 serrate bracts. lycopodioides. 



A"]. Leaves 3-partite, imbricate. Umbels subsessile, 4-flowered, with 4 long bracts. 



aretioides. 



i. AZORELLA ACAULIS (Cav. sub Huanacci. H. cavanillesii'DC.}. 



Stem scape-like. Leaves all radical, long-petioled, palmately y-8-sect; 

 the segments narrow-linear, acute, entire or trifid; petiole widened at 

 base to a ciliated sheath. Scape erect, simple, striate, bearing a 3-rayed 

 compound umbel. Invohicral leaves 3-partite, basally ciliate. The 2 lat- 

 eral umbellules long-peduncled and blooming longer than the subsessile 

 mid one; umbellules several-flowered. Fruit ovate, dorsally flattened. 

 Mericarps with 3 lateral vittae. 



Magellan, S. Patagon., at Puerto Deseado ; by Hatcher at Coy Inlet, 

 "on steppes, rare"; by Peterson at Rio Chico. (Nov.-Dec.) 



" A little known Patagonian plant, remarkable for the resemblance of its 

 almost leafless stem to a scape, and for its branching being trichotomous." 

 (J. D. Hooker.) "Varies from 3 to 50 cm. high, and more or less laxly 

 pilosulous." (Speg.) 



2. A. AMEGHINOI Speg. 



Cespitose, squamous, silvery. Leaves crowded, subimbricate, ovate or 

 lance-linear, involute; petioles slender on an enlarged base. Umbels 



