202 Saxifragaceae 
A. Only base of ovary adnate to calyx; calyx-tube 8 mm. long; flowers not fragrant. 
Wat: T. grandiflora Doug. 
AA. Lower half of ovary adnate to calyx; calyx-tube 6 mm. or less long. 
B. Flowers fragrant; petals pinnately divided, spreading. Calyx-cup 5—6 mm. long. 
W. T. odorata How. 
BB. Flowers not fragrant; petals 3—5-cleft at apex, or entire, erect. Calyx-cup 4 
mm. long. W .C. E. (Heuchera racemosa.) 
T. racemosa Gr. 
MITELLA BISHOP’S-CAP 
Perennial, low, slender. Leaves alternate; blades rounded, cordate; petioles slender. 
Flowers small, in a slender simple spike or raceme. Calyx short, 5-cleft, adherent to the 
base of the ovary. Petals slender. Stamens 5 or 10, included. Ovary from 1/3 to 
wholly inferior, |-celled; placentae 2, parietal or basal; styles 2, very short. Capsule 
short, 2-beaked, 2-valved at summit. Seeds several, smooth, shining. (Diminutive of 
L. mitra—a mitre or cap; referring to the form of the young pod.) 
A. Calyx green; petals pinnatifid. 
B. Ovary almost wholly superior; stigmas entire; stems |—3-leaved; plant with 
summer runners. W.C. E. (Mitellastra caulescens.) 
M. caulescens Nutt. 
BB. Ovary almost wholly inferior; stigmas 2-lobed; stems leafless; plant without 
summer runners. 
C. Stamens alternate with the sepals. W. C. E. 
M, pentandra Hook. 
CC. Stamens opposite the sepals. 
D. Leaves ovate-cordate. W. 
M, ovalis Gr. 
DD.. Leaves broadly reniform-cordate. C. 
M. breweri Gray 
AA. Calyx white; petals trifid or entire. 
E. Leaves angularly lobed; calyx-lobes acute; petals 3-cleft. E. 
M. diversifolia Gr. 
EE. Leaves not angularly lobed; calyx-lobes obtuse. 
F. Petals entire. E.  M. micrantha Pip. 
FF. Petals 3-cleft or -parted. 
G. Raceme not secund; mid-veins of sepals branched; petals 3-cleft, their lobes 
not divaricate. W.C. E. 
M. trifida Pip. 
GG. Raceme secund; mid-veins of sepals simple; petals 3-parted, their lobes 
divaricate. E. M. stauropetala Grah. 
CHRYSOSPLENIUM GOLDEN SAXIFRAGE 
Low, mainly semi-aquatic, somewhat succulent. Flowers smal, axillary (ours) or 
terminal, solitary (ours) or in corymbs. Calyx-cup saucer-shaped or campanulate; seg- 
ments normally 4. Petals none. Stamens 4—10 (8 in ours), on margin of disk. Ovary 
about 74 superior, I-celled, 2-lobed. Styles 2; placentae 2, parietal. (Gk. chrysos= 
gold, splen—the spleen; on account of some reputed medicinal quality.) W. C. (G, 
scouleri.) C. glechomaefolium Nutt. 


