SAXIFRAGACEAE (SAXIFRAGE FAMILY) 119 



1-3-celled or rarely more-celled ; placentae parietal or axial ; styles 

 distinct or somewhat united. Fruit a capsule; follicles usually 

 separate at tip. Seeds several to many. 



A. Leaves centrally peltate, orbicular, g-14-lobed, sharply serrate, 1-4 dm. wide. 

 C. — (Gk. pelte = a small shield, phyllon = a leaf; the leaves are peltate.) 



Peltiphyllum peltatum 

 AA. Leaves not peltate. 

 B. Leaves entire. 



C. Leaf blade widest below its middle; flowers solitary; staminodia present; 

 carpels 3-4, united. PARNASSIA (p. 123) 



CC. Leaf blade widest at or above its middle; flowers not solitary; staminodia 

 none; carpels 2, distinct at least above. SAXIFRAGA (p. 120) 



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. W. C. — (Gk. leptos — small, arren = 

 male; probably referring to the i-celled anthers.) Leptarrhena pyiifolia 



FF. Carpels united at least below; leaves not as above in all points. 

 G. Leaf blade jointed to the petiole. U. — {Saxifraga is another genus of 

 plants; Gk. opsis = form; hence Saxifraga-W^Le.) Saxifragopsis fragarioides 

 GG. Leaf blade not jointed to the petiole. SAXIFRAGA (p. 120) 



EE. Stamens 5; leaf blade either widest at or below its middle and ovate or 

 wider, or else 3-s-foliolate. 

 H. Ovary free from the calyx tube, superior. C. — (Honor of H. N. Bolander, 

 an American botanist.) Bolandra oregana 



HH. Ovary partly united to the calyx tube, partly inferior. 

 I. Rhizome short, bulblet-bearing, with terminal flower stalk. 



HEMIEVA (p. 120) 

 n. Rhizome elongated and horizontal, without bulblets, with lateral flower 

 stalk. 



J. Sepals imbricate; petals persistent; seed winged. W. E. — (Honor 

 of W. S. Sullivant, an American bryologist.) SuUivantia oregana 



JJ. Sepals valvate; petals deciduous; seed wingless. BOYKINIA (p. 120) 

 DD. Ovary i-celled; placentae parietal or basal. 

 K. Sepals 4; petals o or 4; stamens 3 or 8. 

 L. Flowers solitary in the forks of the upper branches; petals none; stamens 8; 

 leaves crenate but not lobed, never with young plants where blade joins 

 petiole. W. C. — (Gk. chrysos = gold, splen = the spleen; on account of 

 some reputed medicinal property.) 



Chrysosplenium glechomaefolium (golden saxifrage) 



LL. Flowers in racemes; petals 4; stamens 3; leaves lobed, often with young 



plant where blade joins petiole. W. C. — (Gk. leplos = slender; + axis; 



referring to the raceme.) Leptaxis menziesii (youth-on-age) 



KK. Sepals 5; petals 5; stamens 5 or 10. 



M. Carpels 3. LITHOPHRAGMA (p. 122) 



