68 
Calyx five-toothed, stamens inserted just under the sinuses. 
se 4. JEPSONIA. 
Calyx five-cleft or five-parted, stamens inserted under the ovary. 
5. SAXIFRAGA. 
Ovary not superior, more or less adnate to the calyx-tube. 
Petals mostly deciduous; stamens five or ten; seeds ovoid, rough. 
6. THEROFON. 
Petals persistent. 
Stamens five. 7. SULLIVANTIA. 
Stamens ten. 
Leaves not peltate. 
Petals at length deflexed; leaves papery-membranous, the blade ob- 
scurely articulated to the petiole. 8. SAXIFRAGOPSIS. 
Petals not deflexed; leaves coriaceous or fleshy, the blade more or 
less decurrent. 5. SAXIFRAGA. 
Leaves peltate. 9. PELTIPHYLLUM. 
Ovary almost entirely inferior; stamens five, 10, HEMIEVA, 
Placentae almost basal. 11, TIARELLA, 
Placentae parietal. 
Petals present ( except in some species of Heuchera). 
Plants large, at least several centimeters high. 
Petals entire, relatively small, 
Stamens five. 12 HEUCHERA. 
Stamens three. 13. LEPTAXIs. 
Petals variously toothed, cleft, lobed or parted, or if entire relatively 
large; stamens five or ten. 
Capsule beaked. 
Corolla regular. 14. TELLIMA. 
Corolla often somewhat irregular; petals sometimes entire, the upper 
often smaller. 15. LITHOPHRAGMA. 
Capsule not beaked. 16. MITELLA. 
Plants minute, about one centimeter high, 17. LEPUROPETALON. 
Petals always wanting. 18, CHRYSOSPLENIUM, 
Staminodia present, alternate with the stamens. 19. PARNASSIA. 
1. ASTILBE Hamilt. 
1. Astilbe biternata (Vent.) Britton, Bull. Torr. Club, 20: 475. 1893- 
Mountains of Virginia and Kentucky to Georgia and Tennessee. 
1a. Astilbe biternata crenatiloba (Britton). 
Astilbe decandra var. crenatiloba Britton, Bull. Torr. Club, 15: 
98. 1888. 
This plant has been seen only from the original station on the 
slope of Roan Mountain, East Tennessee. 
