ROSACEJE. 451 



inserted around tliickened margin of disk ]inin<^ receptacle, articulated 

 below their apices ; anthers terminal dehiscing longitudinally. 

 Carpels 1-4, sessile or stipitate; ovary 1 -celled; style basilar or 

 ventral, apex capitate stigmatiferous. Ovule solitary, incompletely 

 anatropous ; raphe short descending ; micropyle superior extrorse. 

 Achenes 1-4, included in membranous receptacle ; seed exalbuminous, 

 embryo thick fleshy ; radicle short superior. — Perennial or annual 

 herbs ; leaves alternate lobed digitate or palmatipartite, more rarely 

 multifid ; stipules adnate to sheathing petiole ; flowers minute in dense 

 axillary or terminal corymbose cymes, more rarely few or solitary. 

 {Andine South America, temperate and cold regions of Northern Hemi- 

 sphere India North America and Australia) See p. 3 4--'). 



6. Sanguisorba L. — Flowers polygamous or hermaphrodite ; 

 receptacle sacciform of variable depth, lined by a disk with a thick- 

 ened or cushion-like edge closing narrow throat of receptacle to a 

 variable extent. Calyx inserted in throat ; sepals 4, more or less 

 petaloid, decussate imbricate in prajfloration ; 2 lateral exterior. 

 Stamens either definite, usually 4 superposed to petals, or qo ; fila- 

 ments free inserted in throat, either short erect, or elongated fili- 

 form corrugated flaccid \ anthers didymous introrse. Carpels 1-4, 

 included in receptacle, free from each other; ovary 1-ovuiate ; ovule 

 descending ; micropyle superior extrorse ; style terminal, at apex 

 dilated penicillate aspergilliform stigmatiferous. Achenes coriaceous, 

 usually solitar}', included in hardened 4-gonous smooth or rugose, 

 more rarely muricate or 4-winged, receptacle ; seed descending exal- 

 buminous ; radicle of fleshy embryo superior. — Herbs, perennial or 

 very rarely annual, or spiny shrubs ; leaves alternate imparipinnate ; 

 stipules lateral, adnate to sheathing petiole ; flowers capitate or 

 spicate, terminal ; peduncles naked for a long way at base solitary or 

 cymose ; flowers '2-bracteolate. {All warm and temperate regions of 

 Northern Hemisphere.) See p. 347. 



7. Polylepis R. & Pav.— Flowers hermaphrodite ; sacciform re- 

 ceptacle and disk of Sanguisorba. Sepals 3-5, sometimes imbricate, 

 usually finally valvate. Stamens 4-ao (of Sa7igui.sorba) ; filaments 

 short erect. Carpel 1, more rarely 2, 3, and achenes and seeds of 

 Sanguisorba ; receptacle hardened angular spiny or winged around 

 included fruit. — Trees or shrubs ; naked branches tortuous, silky or 



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