SAXIFRAGACEJU. 421 



GENERA. 



I. SAXIFEAGE^]. 



1. SaxifragaT. — Flowers usually hermaphrodite ; receptacle more 

 or less concave, generally disciferous within. Sepals usually 5, free 

 or slightly connate at base, equal or very rarely unequal, imbricate* 

 finally erect or patent. Petals 5, alternating with sepals, rarely 

 subsimilar to them, equal or very rarely unequal, sometimes glan- 

 duliferous or fimbriate at base, imbricate or rarely contorted. 

 Stamens 10, 2-seriate (or more rarely 5, alternatipetalous) inserted 

 more or less perigynously with petals ; filaments free ; anthers 2- 

 celled, often 2-dymous, of introrse or lateral dehiscence. Germen 

 free, or partly or sometimes wholly inferior, surrounded by a disk 

 to a variable height at base, or sometimes laterally ; carpels 2 (very 

 rarely 3, 4), free or more or less highly connate into 1- or 2- celled 

 germen ; placentas parietal or inserted in internal angle, at apex 2- 

 lobed to a variable height ; ovules go , anatropous co -seriate ; carpels 

 terminating in styles more or less elongated, often recurved at apex, 

 truncate or capitate, stigmatose. Fruit dry capsular, 2-valved from 

 apex within between beaks, or formed of 2 follicles, longitudinally 

 dehiscent within. Seeds co , small smooth or rugose ; albumen 

 fleshy ; embryo straight axile, subequal to albumen or shorter. — 

 Perennial herbs, more rarely annual, sometimes frutescent at base ; 

 leaves alternate or opposite ; inferior often rosulate ; petiole gene- 

 rally straight at base ; stipules ; flowers rarely solitary, generally 

 cymose ; cymes (sometimes I -parous) grouped in a simple or 

 branching raceme, often corymbiform {Temperate, Alpine, and Arctic 

 regions of Northern Hemisphere, more rarely Australia, America, and 

 South Africa). See p. 323. 



2. Chrysoplenium T. — Receptacle shortly obconical or urceolate ; 

 leaves of calyx 4, or more rarely 5, short, obtuse, imbricate. Corolla 

 0. Stamens 8-10 (or more rarely 4, 5, alternipetalous) ; filaments 

 free short, inserted round epigynous crenulate disk ; anthers basi- 



