Saxifragaceae 499 



1 1 A. Carpels unequal; petals lanceolate to subulate, entire 8. Tiarella 



11 B. Carpels equal; petals often pinnately divided, simple or absent 9. Mitella 



3B. Staminodia present, plants scapose; flowers solitary 10. Parnassia 



2B. Plants woody, rarely herbaceous; carpels 2-5; stamens sometimes many. 

 12A. Stamens 10 to many. 



13A. Inflorescence usually with showy sterile marginal flowers. 

 14 A. Styles connate. 



15A. Woody climbers; bisexual flowers small, the petals valvate in bud; one sepal of sterile marginal flowers becoming petallike. 



11. Schizophragma 

 15B. Erect perennial herbs; bisexual flowers rather large, the petals imbricate in bud; 3 sepals of sterile marginal flowers becom- 

 ing petallike 12. Deinanthe 



HB. Styles free. 



16.^. Stamens more than 4 times as many as the petals. 



I7A. Leaves opposite; fertile flowers rather large, the petals valvate in bud; calyx of sterile flowers large, 3- to 5-lobed. 



13. Platy crater 

 17B. Leaves alternate, sometimes opposite; fertile flowers small, the petals imbricate in bud; sepals of sterile flowers 3. 



14. Cardiandra 

 16B. Stamens 2-4 times as many as the petals; calyx-lobes of sterile flowers 3-5; fertile flowers small; leaves opposite, rarely 



ternate 15. Hydrangea 



13B. Inflorescence without marginal flowers; fertile flowers moderate to large. 

 18A. Plants woody. 



19A. Flowers 4-merous; stamens many; styles connate; hairs simple 16. Philadelphus 



19B. Flowers 5-merous; stamens twice as many as the petals; styles free; hairs stellate or peltate 17. Deutzia 



183. Plants herbaceous; stamens 3 times as many as the petals; styles free; hairs peltate 18. Kirenges/ioma 



12B. Stamens 5, as many as the petals; woody plants with alternate leaves 19. Ilea 



IB. Fruit a berry; leaves alternate, simple, often palmatcly cleft 20. Ribes 



1. RODGERSIA A. Gray Yaguruma-so Zoku 



Large rather thick perennial herbs with short, stout creeping rhizomes; indument of two forms, hairlike and paleaceous; 

 leaves palmately compound, large, toothed, often trilobulate, the stipules scarious; stems erect, few-leaved; inflorescence paniculate, 

 large, terminal, the ultimate branches scorpioid-cymose; flowers white, small, bracdess, bisexual; calyx-tube shallow, short, the 

 lobes 5, spreading, white in anthesis; petals narrowly linear, small, sometimes absent; stamens 10; capsules subsuperior, 2-locular, 

 dehiscent between the 2 persistent styles; seeds many, small. Few species, in e. Asia. 



1. Rodgersia podophylla A. Gray. R. japonica A. Gray lobules deltoid, the petioles long-hairy at top; inflorescence 20- 



ex Kegel; Astilbe podophylla (A. Gray) Franch. Yagu- 40 cm. long, the branches densely many-flowered, densely 



RUM.\-s6. Stems 20-130 cm. long, terete, few-leaved, rather pubescent, the hairs scalelike; calyx-lobes ovate, acute, 2-4 



stout; radical leaves long-petiolate, the leaflets 5, chartaceous, mm. long; filaments e.xserted; capsules broadly ovoid, sub- 



15-35 cm. long, 10-25 cm. wide, acuminate, cuneate, sessile, superior, about 5 mm. long; styles 2, persistent. June-July. 



irregularly toothed, 3- to 5-lobulate on the upper portion, the Woods in mountains; Hokkaido, Honshu. Korea. 



2. ASTILBE Hamilt. Chidake-sashi Zoku 



Perennial rhizomatous herbs, with scattered long brown scalelike hairs; leaves radical and cauline, alternate, ternately com- 

 pound, rarely simple, the stipules scarious, the leaflets lanceolate to ovate-orbicular, toothed; inflorescence a terminal panicle; 

 flowers small, white or rose-purple, bracteate, bisexual or unisexual (plants sometimes dioecious) ; calyx-tube short, lobes 5, some- 

 times 7-11; petals persistent, linear or absent; stamens 5, 10, or 8; ovary subsuperior; carpels 2, connate at the base; capsules 

 2-locular, dehiscent between the styles; seeds small. Few species, in e. Asia, Himalayas, and N. America. 



\.\. Flowers apetalous; calyx-lobes 7-11, lanceolate; leaves biternate 1. A. platyphylla 



IB. Flowers with narrow petals; calyx-lobes 5, oblong to elliptic. 



2A. Leaves s'unple; calyx-lobes spreading in anthesis 2. A. simplicijoUa 



2B. Leaves ternately compound; calyx-lobes erect in anthesis. 



3A. Leaflets obtuse to short-acute; inflorescence narrow with short ascending or subcrect branches; flowers rose-purple. 



4A. Hairs of inflorescence 1-2 mm. long, brown, curled, woolly; petals linear; leaflets short-acute i. A. chinensls var. davidii 



4B. Hairs of inflorescence 0.5 mm. long or less, often glandular; petals lincar-spathulate; leaflets usually obtuse. . . ^. A. microphytla 

 3B. Leaflets acuminate; inflorescence with elongate, ascending or spreading branches; flowers white to rose-colored. 



5A. Leaflets lanceolate or oblanccolate, thick-chartaceous, the terminal ones narrowed at base 5. A. japonica 



5B. Leaflets ovate-orbicular to narrowly ovate, rarely lanceolate, thin-chartaceous, rounded to cordate at base, the terminal ones 

 very rarely narrowed at base 6. A. thunbergii 



1. Astilbe platyphylla H. Boiss. Momiji-shoma. Dice- branches simple or the lower ones branched, the axils minutely 



cious stoloniferous perennial; stems to 50 cm. long; radical glandular-hairy and with scalelike hairs; flowers yellow-green; 



leaves 2-ternate, the terminal leaflets broadly rhombic-ovate, calyx-lobes 7-11, lanceolate, subacute; petals absent; stamens 



8-17 cm. long, 6-15 cm. wide, long-acuminate, 2- to 5-lobulate, 8-10; capsules 4-5 mm. long. June-July. Hokkaido (Hi- 



doubly acute-toothed; inflorescence 10-20 cm. long, the daka, Tokachi, and Oshima Prov.); rare. 



