500 SAXIFRAGACEAE 
filaments elongated: anthers cordate. Ovary partly inferior. Carpels 2-3, more or less 
united. Ovules numerous in each cavity, on axile placentae. Fruit of 2-3 carpels. Seeds 
small, usually numerous. Testa membranous. FALSE GOAT’S-BEARD. 
Leaflets sharply toothed or lobed: fruit 4 mm. high. 1. A. biternata. 
Leaflets crenately toothed or lobed: fruit 3 mm. high. 2. A. erenatilobata. 
1. Astilbe biternàta (Vent.) Britton. Foliage bright green. Stem 1-2 m. tall, 
branching or sometimes simple: leaves ample; blades mostly thrice ternate, longer than 
the petioles ; leaflets acuminate, sharply serrate or incised, often lobed, cordate at the base, 
the lateral ones oblong to ovate, the terminal ones oval to suborbicular in outline, sharply 
3-lobed, all sparingly pubescent beneath: panicle 1-3 dm. long, finely glandular-pilose : 
sepals ovate, less than 1 mm. long, obtuse: petals narrowly spatulate, 2-3.5 mm. long, 
shorter or wanting in the perfect flowers: fruit oblong-ovoid, 4 mm. high, the follicles 
distinct. [A. decandra D. Don.] 
In rich woods in and near the mountains, Virginia to Tennessee, and Georgia. Spring. 
2. Astilbe crenatilobàta (Britton) Small. Foliage deep green. Stem about 1 m. 
tall, more or less branched : leaves ample; blades thrice ternate; petioles usually shorter 
than the blades ; leaflets thin, crenately toothed or lobed, the teeth or lobes apiculate, the 
lateral leaflets ovate or oval, cordate at the base, the terminal leaflet, ovate or suborbicular 
in outline, usually 3-lobed, cordate or acute at the base: fruit ovoid, 3 mm. high, the 
follicles distinct. [A. decandra crenatilobata Britton. ] 
In deep woods, North Carolina. Summer. 
2. THÉROFON Raf. 
Perennial caulescent herbs, with glandular-pubescent foliage. Leaves alternate, chiefly 
basal: blades suborbicular, toothed, lobed or cleft, petioled, with narrow sometimes cleft 
stipules. Flowers perfect, white, in terminal panicles or corymbose cymes. Sepals 5, 
valvate. Petals 5, surpassing the sepals, deciduous. Stamens 5, inserted near the sepals. 
Ovary 2-3-celled, partly inferior: styles 2-3, short. Ovules numerous, borne on axile 
placentae. Capsule urn-shaped or subglobose, erect or drooping, opening between the 
styles. Seeds minute, numerous, the coat somewhat punctate. [Boykinia Nutt. ] 
1. Therofon aconitifdlium (Nutt.) Millsp. Stem erect, 2-10 dm. tall, simple below: 
leaves alternate; blades suborbicular or reniform in outline, 4-18 cm. broad, palmately 
5-7-lobed, the lobes incised-serrate or lobed, the segments acute ; petioles glandular-pilose, 
the lower ones longer than the blades, the upper shorter: bracts leaf-like, incised : corymb 
glandular-pubescent: sepals 5, triangular-ovate or broadly lanceolate, acute, glandular- 
ciliate, longer than the hypanthium during anthesis : corolla white, 5-7 mm. broad : petals 
3-3.5 mm. long, eroded ; blades oval, narrowed into short claws: capsules 3-4 mm. long, 
adnate to the hypanthium up to the distinct beaks: seeds 0.5 mm. long, black. 
In and along streams chiefly on mountain slopes, Virginia to North Carolina, Tennessee and 
Georgia. Spring and summer. 
3. MICRANTHES Haw. 
Perennial scapose herbs, with short rootstocks and glabrous or glandular-pubescent 
foliage. Leaves basal: blades thick, entire or variously toothed, mostly petioled. 
Flowers perfect, in terminal panicled or head-like cymes. Sepals 5. Corolla regular : 
petals 5, equal or nearly so, scarcely clawed. Stamens 10: filaments subulate or club- 
shaped. Carpels normally 2, slightly united below: styles erect or recurved. Ovules 
numerous. Follicles 2, more or less narrowed above, often diverging. Seeds variously 
roughened. SAXIFRAGE. MOUNTAIN LETTUCE. 
Filaments subulate or filiform-subulate. : 
Sepals 1.5-4.5 mm. long: petals oblong, elliptic, oval or suborbicular. 
Petals oblong, oval or suborbicular, wholly white. 
Petals over twice as long as wide, much longer than the sepals: ped- 
z cca pubescent. : : 1. M. Virginiensis. 
etals less than twice as long as wide,slightly surpassing the sepals: 
pedicels glabrous. S wi 2. M. Texana. PAS 
Petals lanceolate, each with 2 yellow spots. 8. M. Tenner 
Sepals 1 mm. long : petals elliptic. 4. M. Careyana. 
rece egy fae : 5. M. Grayana 
etals with 2 yellow spots, ovate or oblong-ovate: follicles 4-6 mm. long. . M. OT :difolia. 
Petals white throughout, oblong: follicles 7-8 mm. long. 6. M. mier anthidifoka 
