528 46. SAXIFRAGES. Pl.ex.cal. 



Fam. XL 46. SAXIFRAGES. Jussieu. 



Calyx adherent, or rarely free, limb 5-lobed ; petals 4 

 or 5, on the rim of the calyx, alternating with the lobes, 

 rarely 0; stamens inserted with the petals, as many or 

 double the number, opposite and interposed ; styles 2, per- 

 sisting; ovary 1, gh't with a gland; capsule 2-beaked, 

 2-valve, 1 or 2-celled, opening by a terminal pore; valves 

 in the 2-celled capsules bent inwards; seeds on the par- 

 titions or base of the capsule; perisperm fleshy ; corculum 

 axile, straight; radicle below. — Stem herbaceous; leaves 

 alternate, rarely opposite; injlorescence various. 



A. Petals 5, regular, clawed. . 



Ovary free ; jilaments roundish, spindle- 

 shape ROBERTSONIA. 312. 



Ovary free ; filaments dilated at bottom, 

 connate; calyx bent back; petals naked . . Hydatica. SIS. 



Ovary free ; filaments dilated at bottom, 

 connate; calyx upright Miscopetalum. 314. 



Ovary free; filaments dilated at bottom, 

 connate ; pe^aZi 2-horned at the base .. Kingstgnia^ 315. 



B. Petals 5, regular, not clawed. 

 Ovary adherent Saxifraga. 316. 



C. Petals none. 



Capsule 2-valved ; placentarium basillary. 



Chrvsosplenium. 317. 



I. 312. ROBERTSONIA. Haworth. None-so-pretty. 

 Calyx free, 5-parted, lobes membranaceous, becoming 

 reflected ; corolla S-petaled, regular ; petals clawed ; Jila- 

 ments round, slender at bottom, thickened at top, as long as 

 the petals ; ovary free ; capsule 1 -celled, many-seeded, 

 beaked; beaks recurved. — Root perennial; leaves roundish, 

 wedgeshape or oblong; edge cartilaginous, toothed or cre- 

 nulate; scape solid, leafless, effused, panicled ; j^oit^er^ small, 

 white, sprinkled with I'ed or yellow spots. 



1 . Robertsonia serrata. Sawleafed none- so-pretty. 



Leaves reverse ovate, wedgeshape, stiiF, acutely serrate, 

 bald, naked. 



