MACLOSKIE: ROSACE^E. 471 



Chonos Archip. and Temperate regions, N. and S. ; N. Patagon., very 

 rare by streams near Nahuel-huapi. (Speg.) 



7. GEUM Linn. 



Perennial herbs, with pinnate or pinnately-divided leaves, the basal 

 leaves larger than the others. Calyx 5-lobed, with as many bracteoles. 

 Petals 5, yellow to purplish, exceeding the calyx, stamens numerous, on 

 the calycine disk. Carpels numerous, on the dry receptacle. Style fili- 

 form, sometimes abruptly bent, or plumose in fruit. 



Species 36, in temperate zones, N. and S. ; some arctic. 



Section Sieversia, regarded by some as a distinct genus, has the whole 

 style persisting on the achenes. 



KEY TO THE SPECIES. 

 A. Flowers white, small. 



b. Leaves interruptedly pinnatisect ; terminal lobe large. 



Trifid bract subtending the thick pedicel. paruiflorum. 



b2. Leaves pinnate ; floral leaves in an involucre. involucratunt. 



A2. Flowers yellow. 



b. Leaves pinnatisect ; terminal lobes large. chiloense. 



/. r> j- t i -,.Lji- f magellanicum, 



02. Radical leaves interruptedly pinnate. < f 



\ urbanum. 



i. G. CHILOENSE Balb. (G. chilense Lindl.) 



Leaves irregularly pinnatisect, crenate ; the terminal lobes rounded, 

 much exceeding the others. 



Chili; Chiloe I; N. Patagon., by Lago Nahuel-huapi; by Rio Sta. 

 Cruz; Punta Arenas. (Perhaps a var. of G. urbanum L.) "Flowers 

 yellow, subsessile or long-pedicelled." (Speg.) 



2. G. INVOLUCRATUM JuSS. 



Leaves pinnate ; the outermost rotundate-crenate. Floral leaves as an 

 involucre. Scape, 5-peduncled ; naked below, and leafy under the sub- 

 capitate flowers. Corolla white, shorter than the calyx. 



Magellan. 



* 



3. G. MAGELLANICUM Comm. (=G. urbanum Index Kewensis; see No. 5 



below). 



Leaves pinnate ; the outermost divisions very large and lobed ; the lower 

 very small. Scape elongate. It grows with G. involncratum ; but its 

 lateral leaves are much smaller, and with very small leaves interposed. 



