Saxifragaceae 195 

CC.  Follicles widely spreading; leaves without a line of pits. 
D. Leaves of sterile shoots opposite; cyme-branches short, mostly simple. W. 
+ LEB 04 S. divergens Wats. 
DD. Leaves alternate; cyme-branches long, forked. 2 
y E. Biennial, 2.5 dm. or less high, not forming off-sets. C. (S. divarica-’ 
tum.) S. leibergii Brit. 
EEF. Perennial, 1 dm. or less high, forming off-sets. W. 
S. woodii Brit. 
AA. Leaves linear to ovate, widest at or below their middle, terete or flat. 
F. Perennial; leaves linear to lanceolate. 
G. Leaves linear, not ciliate; follicles erect or pealiy sd. Wk. aE 
. S. stenopetalum Pursh 
GG. Leaves linear-lanceolate to lanceolate; follicles widely spreading. 
H. Leaves not ciliate. W.C. E. (S. uniflorum.) 
S. douglasii Hook. 
HH. Lower leaves ciliate. U. 
S. ciliosum How. 
FF. Annual; leaves oblong or ovate-oblong, 512 mm. long, 2—4 mm. wide. W. 
(S. pumilum.) g. radiatum Wats. 
SAXIFRAGACEAE > Saxifrage Family 
Herbs but sometimes shrubby; juice watery. Leaves opposite or alternate, simple 
or compound, often palmately veined; stipules none or present. Flowers mostly perfect. 
Sepals 4—5, united to nearly distinct. Petals 0 or 4 or 5, alternate with the sepals. 
Stamens as many or twice as many as the sepals, rarely fewer, on the throat of the calyx. 
Ovary superior or partly inferior, 1—3-celled or rarely more-celled; placentae parietal or 
axial; styles distinct or somewhat united. Fruit a capsule; follicles usually separate at tip, 
opening along the inner edge. Seeds numerous or rarely several. 
A. Leaves centrally peltate, orbicular, 9——14-lobed, sharply serrate, |—4 dm. wide. 
PELTIPHYLLUM (p. 199) 
AA. Leaves not peltate. 
B. Leaves entire. 
C. Leaf-blade widest below its middle; flowers solitary; staminodia present; car- 
pels 3—4, united. PARNASSIA (p. 203) 
CC. Leaf-blade widest at or above its middle; flowers not solitary; stamnodia 
none; carpels 2, distinct at least above. é SAXIFRAGA (p. 197) 
BB. Leaves not entire. 
D. Either ovary 2-celled and placentae axial or basal, or else carpels separate. 
E. Stamens 10; leaf-blade widest above its middle or else narrower than ovate 
(except in many Saxifraga). 
F. Carpels distinct; leaves 2.5——15 cm. long, coriaceous, glabrous on both 
sides, coarsely serrate above the middle. LEPTARRHENA (p. 196) 
FF. Carpels united at least below; leaves not as above in all points. 
G. Leaf-blade jointed to the petiole. SAXIFRAGOPSIS (p. 199) 
GG. Leaf-blade not jointed to the petiole. SAXIFRAGA (p. 197) 
EE. Stamens 5; leaf-blade either widest at or below its middle and ovate or 
wider, or else 3—5-foliolate. 
H. Ovary free from the calyx-tube, superior. BOLANDRA (p. 196) 
HH. Ovary partly united to the calyx-tube, partly inferior. 

