324 ORDER LIX. — SAXIFRAGACEiE. 



dehiscence. Seeds anatropous, numerous, and small. Embryo 

 Btraight. 



ANALYSIS. 



1. Steins herbaceous 2 



Stems woody 7 



2. Petals none Chrysosplenium, 5 



Petals present 3 



8. 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 Heuchera, 3 



Styles 3 Ispwropetalon, 6 



7. Climbing plants DecumaHa, 9 



Shrubs or small trees 8 



8. Style 1 Itea, 7 



Styles 2 Hydrangea, 8 



Styles 4 Philadelphia, 10 



Genus I.— SAX IF' RAG A. L. 10—2. 



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

 the species in curing the stone.) 



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

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

 between the beaks. 



1. S. leucanthf.mifo'lia, (Lap.) Stem -with viscous hairs. Leaves 

 spatulate, 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. U- June — Sept. Upper districts of Car. and Geo. lu — 20 in. 



2. S. Virginien'sis, (Mich.) Stem pubescent. Leaves oblong, ovate, 

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

 dense, cymose clusters. Calyx with erect segments, obtuse. Petals 

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

 tinged with purple. It. Mountains. 4 — 12 inches. 



• ixus II.— BOYKINIA. Nutt. 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— '5, short. C(//)s?rfe 2 — 3-celled, with central pla- 

 centa 1 , 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. 13. AinMir >. 1 1 \. (Nutt.) Stem glandular. Leaves 5 — 7-lobed, 

 glabroas; cyme fastigiate, viscid. Flowers secund ; teeth of the calyx 

 Broadly triangular, ;i uenred. — Petals longer than the calyx, obovate, 

 Bome times wanting. — White. If. June-— July. Mountains. 



