liOSACE^. 455 



style itself. Seed erect ; radicle of straight embryo inferior.— Herbs, 

 often creeping or stoloniferous ; rhizome perennial ; radical leaves 

 imparipinnate or pinnatisect ; cauline few, often 3-foliolate or bract- 

 like ; stipules adnate to sheathing base of petiole ; flowers solitary, or 

 usually few cyraoso-corymbose on erect scapes. {All cold and temperate 

 regions.) See p. 365, 



16. Dryas L. — Flowers hermaphrodite (of Geiim), 8-9-merous. 

 Achenes (of Geum) terminated by barbate plumose persistent styles. 

 Eadicle of embryo inferior. — Humble csespitose undershrubs ; stem 

 short thick ; leaves simple alternate ; stipules adnate to petiole ; 

 flowers solitary terminal pedunculate. {Alpine temperate and Arctic 

 regions of Northern Hemisphere.) See p. 367. 



17. Cowania Don. — Flowers hermaphrodite or polygamous ; 

 receptacular glands sacciform or turbinate, glandular outside, lined 

 by a glandular disk. Sepals 5, ecalyculate, inserted in throat of 

 receptacle ; prsefloration imbricated. Petals 5, imbricated. Stamens 

 CO (of the Rosacea), inserted in throat of receptacle. Carpels 5-qo 

 and achenes of Dryas. Seed ascending ; albumen thin ; radicle of 

 straight fleshy embryo inferior. — Bushy shrubs ; leaves alternate 

 3-5-fid or partite; stipules adnate to short petiole. {California, 

 Mexico.) See p. 368. 



18. Fallugia Endl. — Flowers hermaphrodite (of Cowania) ; 

 receptacle hemispherical obconical; calyx 5-bracteolate ; disk 

 villous. Carpels qo and achenes of Dryas. Seed erect ; embryo 

 exalbuminous ; radicle inferior. — A much-branched erect shrub ; 

 twigs virgate ; leaves alternate irregularly 3-5-lobed or pinnatifid ; 

 stipules adnate to petiole ; flowers solitary on long peduncles or few 

 cymose. {Mexico.) See p. 368. 



19. Chamsebatia Benth. — Flowers hermaphrodite (of Coicania) ; 

 receptacle glandular outside, disciferous within ; sepals imbricate 

 ecalyculate; petals as many and stamens qo (of the Rosacc(c). 

 Carpel 1, free inserted in bottom of receptacle; ovary 1-celled ; 

 style subterminal, deeply furrowed down one side ; edges of furrow 

 reflexed stigmatiferous ; ovule 1, suberect; raphe ventral; micro- 

 pylc inferior extrorse. Achene coriaceous included in persistent 



