Mitella

M. Wakabayashi, 2006, Tiarella and Mitella, Flora of Japan, Volume 2 b: Angiospermae-Dicotyledoneae: Archichlamydeae (b), Kodansha, pp. 70-75 : 70-71

13. Mitella L.* 24

Hara, H. 1939. Mitella . In: Nakai, T. and M. Honda (eds.). Nova Flora Japonica 3: 121-136. Sanseido, Tokyo. Wakabayashi, M. 1973. A note on the genus Mitella of Japan. Acta Phytotax. Geobot. 25: 136-153.

Wakabayashi, M. 1977. A note on Mitella stylosa and allied species ( Saxifragaceae ). Acta Phytotax. Geobot. 28: 111-122.

A. Ovary half inferior or subsuperior; stamens 5 or 10; seeds smooth, black at maturity

B. Stamens 10; petals 9-pinnatiparted, pinna slender, not glandular (Sect. 1. Nudae ) ............................................ 1. M. nuda

B. Stamens 5, opposite calyx lobes; petals subulate-linear, minutely glandular dotted (Sect. 2. Spuriomitella)

.....................................................................2. M. integripetala

A. Ovary inferior; stamens 5, alternate calyx lobes; seeds scabrous often with papillae, greenish to dark brownish (Sect. 3. Asimitellaria )

B. Plants dioecious; petioles and abaxial surface of leaves glabrous; stoloniferous ...........................................3. M. acerina

B. Plants with flowers hermaphrodite; petiole and leaves hirsute or densely glandular hairy

C. Petals absent; flowering stems 2-7 cm tall; seeds papillose .......................................................................4. M. doiana

*24 M. Wakabayashi

C. Petals present, pinnately parted, rarely linear; flowering stems 10-50 cm tall

D. Stamens attached to disc, separate from base of petals; tip of style punctate; stoloniferous ..............5. M. pauciflora

D. Stamens adjacent to base of petals; tip of style thickened and often lobed; not stoloniferous

E. Calyx lobes erect with ascending to slightly recurved tip

F. Seeds papillose ...............................................................................6. M. stylosa

F. Seeds not papillose ...............................................................................7. M. furusei

E. Calyx lobes spreading at anthesis, often reflexed toward apex

F. Seeds papillose .............................................................................8. M. kiusiana

F. Seeds not papillose

G. Leaf blade widely ovate; stipules fused at base of petiole ....................................................9. M. koshiensis

G. Leaf blade narrowly ovate; stipules free at base of petiole

H. Rhizomes hypogaeous, thickened, with leaves tufted at apex ........................................... 10. M. japonica

FI. Rhizomes epigaeous, long creeping, rather slender, with leaves separate ..................... 11. M. yoshinagae