Saxifragaceae 501 



1. Tanakaea radicans Fr. & Sav. Iwa-yuki-no-shita. densely flowered, erect or often declined or nodding in fruit, 



Radical leaves subcoriaceous, green above, paler beneath, ob- 5-15 cm. long; flowers small, whitish, apetalous; capsules 3-4 



tuse or subacute, 2-8 cm. long, 1-5 cm. wide, rounded or mm. long; carpels 2, connate nearly the whole distance, de- 



sometimes cordate at base, the petioles loosely coarse-hairy; hiscent. May-June. Wet shaded rocks; Honshu (T6- 



scapes 10-30 cm. long, loosely long coarse-hairy; inflorescence kaido Distr.), Shikoku, Kyushu; rare. 



4. SAXIFRAGA L. Yuki-no-shita Zoku 



Perennials, sometimes annuals or biennials; leaves simple, often toodied or lobed; flowers 1 to many, usually in cymes, white 

 or yellowish, bisexual; calyx-tube prominent or shallow and short, the lobes or segments 5; petals 5, equal or unequal; 

 stamens 10, the filaments filiform or sometimes dilated above; carpels 2, connate at base; styles 2, short or rather elongate, free, 



the stigma small; capsules dehiscent between the styles; seeds many, small, somedmes tuberculate, sometimes caudate. More 



than 300 species, especially abundant in the N. Hemisphere. 



lA. Calyx-tube well developed; ovary semisuperior; leaves reniform-orbicular, palmately lobed. 



2A. Inflorescence with bulbils; petals oblanceolate, 6-8 mm. long, 3-4 times as long as the calyx-lobes; alpine 1. S. cerntia 



2B. Inflorescence without bulbils; petals broadly obovate, about 5 mm. long, 1.5-2 times as long as the calyx-lobes; wet rocks near the sea. 



2. S. bracteata 

 IB. Calyx-tube short and shallow; ovary superior or nearly so. 

 3A. Stems scapose, simple or only sparsely branched at base; leaves distinctly petiolate (except nos. 6—7). 

 4A. Flowers actinomorphic; petals all alike and equal. 

 5A. Radical leaves reniform-orbicular, long-pctiolate. 



6A. Flowers red-brown or greenish brown; petals twice to several times as long as the stamens; disc prominently raised. 



l.S.jusca 

 6B. Flowers white or sometimes purplish red; petals slightly longer than the stamens; disc narrow. 



7A. Scapes 15-80 cm. long, naked or with a single small leaf; radical leaves cordate, 3-10 cm. long and nearly as wide, ir- 

 regularly toothed; seeds long-tailed at each end 4. 5. japonica 



7B. Scapes 5-25 cm. long, naked; radical leaves reniform, 2-4 cm. long, 3-6 cm. wide, regularly toothed; seeds not tailed. 



5. S. renijormis 

 5B. Radical leaves ovate to oblong-cuneate, sessile or short-petiolate. 



8A. Scapes 10-40 cm. long; radical leaves 4-10 cm. long, with many teeth; hairs with 1 longitudinal row of cells. 



6. S. sachalinensis 

 8B. Scapes 5-10 cm. long; radical leaves 1-3 cm. long, coarsely 5- to 11-toothed; hairs with many rows of cells. . . 7. 5. laciniata 

 4B. Flowers zygomorphic; petals of two forms. 



9A. Aerial stems stout, usually simple, 3-20 cm. long, erect; leaves ovate-orbicular 8. 5. sendaica 



9B. Aerial stems absent; leaves radical, usually reniform-orbicular. 



lOA. Upper petals nearly lanceolate, gradually narrowed at base, not spotted; seeds smooth, not tubercled; summer and autumn 



flowering 9. S. jortunei 



lOB. Upper petals broadly ovate, abruptly narrowed below to a claw, spotted; seeds tubercled. 



IIA. Leaves palmately cleft to lobed, the lobes broadly ovate to oblong; autumn flowering 10. S. cortiisaejoha 



11 B. Leaves shallowly and obsoletely lobulate, the lobules depressed; spring flowering. 



12A. Stolons present; leaves deep green and obsoletely variegated on upper side, purplish red beneath; upper petals with 



yellow and small red spots 11.5. stolonijera 



12B. Stolons absent; leaves green and not variegated on upper side; upper petals with yellow spots only near base. 



12. S. nipponica 

 3B. Stems well-developed, short, much-branched and tufted, densely leafy; leaves small, ciliate. 

 13A. Petals narrowed at base, not clawed, lanceolate, with small spots. 



14A. Leaves 3-lobed, glandular on the margin 13. 5. nishidae 



14B. Leaves undivided, ciliate and bristle-margined 14. S. cherlerioides var. rebiinshirensis 



13B. Petals broadly ovate, distinctly clawed at base, not spotted; leaves 6-25 mm. long, often shallowly 3-lobed, with long glandular 

 hairs on margin 15.5. merkji 



1. Saxifraga cemua L. Mukago-yuki-no-shita. Per- tuse, glandular-pilose, about 2.5 mm. long; petals ascending, 

 ennial with short rhizomes and numerous small scalelike spreading above, oblanceolate, 3-nerved, 6-8 mm. long; cap- 

 fleshy bulbils; scapes erect, simple, 5-25 cm. long, long-pubes- sules usually not developed. Aug. Wet shaded rocks in 



cent, naked except for few leaves on lower half; radical leaves high mountains; Honshu (alpine regions in Shinano Prov.) ; 



few, reniform-orbicular, palmately 5- to 7-cleft, 5-15 mm. long, rare. Mountains and northern regions of the N. Hcnii- 



7-17 mm. wide, slighdy fleshy, the petioles slighdy dilated at sphere. 



base, with soft curled hairs; cauline leaves short-peuoled, 2. Saxifraga bracteata D. Don. 5. laurentiana Scr.; S. 



broadly cuneate to shallowly cordate, the lobes acute, the rivularis var. laurentiana (Ser.) Engl.; S. jauriei H. Boiss.; S. 



upper leaves gradually becoming bracteate; flowers few, exilis sensu Yabe & Yendo, non Steph. Kiyoshi-s6. Re- 



loosely spicate (bulbils appearing in place of the lowermost sembles the preceding, but larger and less pubescent; stems 

 flowers), the bracts lanceolate to elongate-ovate, sessile, the stouter, often shortly branched; leaves 1^ cm. wide, the shal- 

 rachis with curled glandular hairs, the terminal flowers usu- lowly lobed bracts leaflike; inflorescence cymose, loose, few- 

 ally well-developed, white; calyx-lobes broadly lanceolate, ob- flovvered, without bulbils; calyx-lobes broadly ovate; petals 



