SAXIFRAGACEAE 591 
Placentae axile: ovary 2-celled or rarely 3-celled. 
Stamens 5: ovary almost all adnate to the hypanthium. 6. THEROPHON. 
Stamens 10: ovary basally adnate to the ype ae 
Corolla regular, the petals aerate pumas T. MICRANTHES. 
Corolla irregular, the petals of 2 kin 8. HYDATICA. 
II. ASTILBEAE 
Large herbs with much-branched plume-like panicles. 9. ASTILBE. 
1. LEP TALON El. Annual diminutive terrestrial herbs. Leaf- 
blades entire. Petals white. Stamens 10. Styles 3.—One specie | 
L. spathulatum (Muhl. ) EH. Plant 
T abrous, in m 1-15 em. wide: leaf- 
blades spatul ce Noa mm. long: sepals VG, 
2. CHRYSOSPLENIUM [Tourn] L. Perennial one 8) e pd 
herbs. Leaf-blades crenate or lobed. Petals wanting. Stamens mostly 
Styles 2. et flattened, 2-lobed, very 
short.—About 15 species, natives of the 
north eens zone and S. America. 
1. C. americanum Schwein. Plants de- 
eumbent, 2-20 em. long: leaf- blades ded 
orbieular to orbicular-reniform, 4-20 
I ES WATER-CARPE 
Pd haded places, various provinces, in 
. an 
3. MITELLA L. Perennial herbs with lateral flowering branches. Leaf- 
blades lobed and toothed. Flowers in racemes. Sepals equal. Petals pecti- 
natifi mens filaments 
abruptly narrowed near the apex.—TFour 
species, North American and Asiatic. 
1. M. diphylla L. Plant 2-4 dm. tall: leaf- 
blades ovate to orbicular-ovate in T 
ng, a 
—Rich woods, various us provinces N. C 
Mo., Minn., and Que 
