54 SAXIFRAGACER, 
SAXIFRAGACEE. 
§ 1. Herbs with leaves alternate or all radical (except No. 2 in 7): styles 2 or 3 (seasile 
stigmas 3 or 4 in 11): carpels united or rarely distinct, the tips divergent (flattened- 
obcordate in 12). 
Stamens apparently many in clusters, only 5 perfect..........ececccccevcessoseoes AL 
Stamens 8-10: petals none: flowers minute, axillary, solitary........... eo 12 
Stamens 1( (rarely more or less in No. 1): flowers in terminal racemose or cymose clusters. 
Petals broad, entire: ovary 2-celled or carpels distinct...........-sceeeceeeeee I 
Petals pinnatifid, 3-7 lobed or entire: ovary 1-celled: racemes simple,.........- 7 
Petals entire, very slender: styles slender; carpels unequal.............- creeee 8 
Stamens 5: petioles expanded stipule-like, or bristly at base. 
Petals deciduous, entire, broad: radical leaves 3-parted...........-+- No. 2in 1 
leaves 3-9-lobed or cleft: ovary inferior. 2 
Petals deciduous, often crenate, white: seeds winged.....................0-- 5 
pinnatifid or 3-cleft; lobes filiform: ovary globular........... 9 
entire or wanting, small: ovary l-celled............0..---.-10 
Petals persistent, entire or 3-lobed, spatulate, violet: ovary inferior............ 8 
entire, slender, purple: ovary superior........--ceceecss cece 4 
Stamens 3: netals entire, filiform, recurved persistent...............00 iepes eens 6 
§ 2. Shrubs with large white flowers or woody-based herbs: leaves. opposite. 
Shrubs: stamens 20 or more: petals 4 or 5: stigmas distinct.......... Pree C3 
petals 5 to 7: stigmas united........... asisilors iwiois 14 
Herbaceous: branches terminated by capitate clusters of small flowers.......... 15 
§ 3. Slender shrubs: leaves alternate: flowers mostly in drooping clusters: ovary inferior, 
globose: calyx-lobes larger than the erect petals, usually petaloid..............- --..16 
1, SAXIFRAGA, Linnzus. 
° Stemless, or rarely a leaf or two on the scape below. 
Leaves large, peltate, cupped in the center: flowers pink............-..-..005 SO ome | 
Leaves an inch or lesa broad, short petioled: scape 2 to 4 inches high..... ... sya waves g) 32 
Leaves rounded-cordate, long petioled: filaments broadest above: calyx soon reflexed 8, 9 
Leaves not cordate, contracted at base into a margined petiole or nearly seasile. 
Calyx-lobes erect or spreading..........0.-¢ceeeeeeececuee coceeees 3, OS 
Calyx-lobes reflexed in fruit or sooner..........0.2-.06 sesccveeee & 6, 7 
* © Stems leafy, tufted (except No. 12): petioles short. 
Leaves small, evergreen, entire, crowded. Alpine........... tussiemesee sae kO 
Leaves like strawberry leaflets: flowers greenish..................e00¢ soesee Ll 
Leaves few on the stem: stamens 5.........006.-. 2 cece cece cece eens sihieinaes - 12 
1. 8. peltata, Torr. Scape stout, 1-3 ft. high: carpels distinet Streams. 
% 8. Parryi, Torr. Calyx and white petals brown or purple-veined. 
