
Saxifragaceae 199 
‘T. Leaves as long as or shorter than wide. U. 
S. parvifolia Gr. 
TT. Leaves plainly longer than wide. U.C. (S. claytoniaefolia; 
S. howellii.) 
S. fallax Gr. 
I]. Filaments clavate to spatulate. 
U.  Leaf-blade fan-shaped. E. 
S. lyallii Engler 
UU. Leaf-blade oblong to orbicular. 
V.  Leaf-blade narrowed at base, neither cordate nor orbicular. 
W. Petals white with 2 yellow blotches below the middle. U. CS. re- 
flexa for our region.) 
S. marshallii Gr. 
WW. Petals totally white. 
X. Cymules of the inflorescence permanently compact. W. C. 
S. occidentalis Wats. 
XX. Cymules of the inflorescence lax and open. C. E. 
S. saximontana Nels. 
VV. Leaf-blade orbicular or nearly so. 
Y. Flowers in a compact terminal head. W. C. E. 
S. nelsoniana Don. 
YY. Flowers in a narrow spike-like panicle. W. 
S. spicata Don. 
YYY. Flowers in open or corymb-like panicles. W.C.E. (S. aestivalvis; 
S. odontophylla.) §, arguta Don. 
SAXIFRAGOPSIS 
Perennial. Leaves alternate, simple, crowded on the caudex, remote on the flower- 
stem, grading into bracts above; petiole slender, persistent, scarious, ribbed, its base 
dilated; blade cuneate, toothed at apex or above the middle. Flowers numerous, in 
cymes; cymes in a thyrsoid panicle, with small ciliate bracts. Calyx-tube campanulate; 
segments 5, about the length of the tube. Petals spatulate, reflexed at maturity. Ovary 
partly inferior; carpels united below the middle. Follicles erect; their tips subulate; not 
diverging. Seed smooth. (Saxifraga—=another genus of plants, Gk. opsis—form; hence 
Saxifraga-like.) U. S. fragarioides Small 
PELTIPHYLLUM 
Perennial, rather coarse, acaulescent. Leaves alternate, all basal; blade suborbicu- 
lar, shallowly lobed, toothed, peltate; petiole long, widely dilated at base. Flowers in 
wide terminal corymbose cymes, on scapes exceeding the leaves. Calyx-tube small, flat- 
tish; segments 5, longer than the tube. Petals wide, clawless, white or pinkish. Stamens 
10. Ovary slightly inferior; carpels united only at base. Follicles more or less spread- 
ing. (Gk. pelte—a small shield, phyllon—tleaf; the leaves are peltate.) C. 
S. peltatum Engler 
TIARELLA COOL-WORT 
Perennial. Stipules present. Flowers in racemes or panicles. Calyx-tube small, 
short-campanulate; segments 5, ovate or lanceolate. Petals either clawed and with oblong 
or elliptic blades, or else clawless and filiform. Stamens 10, exserted. Ovary 1-celled, 
almost entirely superior; placentae 2, parietal but almost basal. Capsule membranous; 

