324 OEDER LIX. SAXIFRAGACE^. 



dehiscence. Seeds anatropous, numerous, and small. Embryo 



straight. 



ANALYSIS. 



1. Stems herbaceous 2 



Stems woo dy 7 



2. Petals none Chrysosplenium, 5 



Petals present 3 



3. Leaves compound Astilbe, 4 



Leaves simple 4 



4. Stamens 5 5 



Stamens 10 Saxifraga, 1 



5. Capsule 2— 3-celled. . Boykinia, 2 



Capsule 1-celled 6 



6. Styles 2 Ileuchera, 3 



Styles 3 Lfpuropetalon, 6 



7. Climbing plants Decmnaria, 9 



Shrubs or small trees 8 



8. Style 1 Ilea, 7 



Styles 2 Hydrangea, 8 



Stylos 4 Philadelphus, 10 



Genus I— SAXIF'RAGA. L. 10—2. 



(From saxum, a stone, and frango, to break, from the supposed virtues of some ol 

 the species in curing the stone.) 



Sepals 5, more or less united. Caiyels 2-beaked, 2-celled, 

 many-seeded, free or attached to the calyx, opening by a hole 

 between the beaks. 



1. S. leucanthemifo'lia, (Lap.) Stem with viscous hairs. Leaves 

 epatulate, oval, attenuate into a long marginal petiole, with acute and 

 large teeth. Flowers in a long, diffuse, much-branched panicle. Calyx 

 reflexed, persistent. Petals unequal. — White, variegated with pink and 

 yellow. 11. June — Sept. Upper districts of Car. and Geo. 10 — 2u iU. 



2. S. Yirginien'sis, (Mich.) >S/!^??i pubescent. Xeai'fs oblong, ovate, 

 or spatulate, obovate, attenuate into a broad petiole. Floviers in 

 dense, cymose clusters. Calyx with erect segments, obtuse. Peta^i 

 oblong, obtuse. Carpels united by the base to the calyx. — Whitt, 

 tinged with purple, li. Mountains. 4 — 12 inches. 



Genus II.— BOYKIN'IA. Xutt. 5—2. 

 (In honor of Dr Boykin, of Georgia.) 



Calyx turbinate or urceolate, cohering to the ovary, 5-cleft; 

 segments acute, triangular. Petals 5, entire. Stamens 5. 

 Styles 2 — 3, short. Capsule 2 — 3-celled, with central pla- 

 centJB, many-seeded, 2-beaked, dehiscent by pores between the 

 beaks. Perennial plants, with alternate, lobed, and palmately 

 round leaves. Flowers in corymbose cymes, small. 



1. B. acon-itifo'lia, (Nutt.) Stem glandular. Leaves 5— 'Z-lobed, 

 glabrous; cyme fastigiate, viscid. jP/owrs secund ; teeth of the calys 

 broadly triangular, 3-nerved. — Petals longer than the calyx, obovate 

 sometimes wanting. — White. 2^. June — Julv. Mountains. 



