494 Crassulaceae 



lA. Plants dioecious, the flowers usually 4-merous, rarely 5-merous. 



2A. Leaves elliptic, obovate or narrowly oblong, glaucous, obsoletely serrate, 5-15 mm. wide, smooth on margin 1. 5. rosea 



2B. Leaves oblanceolate not glaucous, coarsely serrate, 3—5 mm. wide, uneven on margin 2. 5. ishidae 



IB. Plants bisexual, the flowers usually 5-merous. 

 3A. Leaves not spine-tipped; inflorescence cymose. 

 4A. Rhizomes stout; leaves basifixed, usually toothed. 

 5A. Flowers greenish white to rose-purple. 

 6A. Flowers rose-purple. 



7A. Stems tufted, 5-25 cm. or rarely to 30 cm. long, densely leafy; leaves 1-2.5 cm. or rarely to 3 cm. long. 



8A. Leaves ternate, flabellate-orbicular, manifestly shorter than broad, sparingly undulate-toothed 3. 5. sieboldii 



8B. Leaves opposite or alternate, ovate-orbicular to oblanceolate, as long as to narrower than wide. 



9A. Leaves short-petiolate, usually few-toothed 4. 5. cauticolum 



9B. Leaves sessile, entire 5. S. pltiricaule var. yezoense 



7B. Stems few or solitary, 30-50 cm. long, loosely leaved; leaves 4-8 cm. long. 



lOA. Stamens conspicuously longer than the petals; leaves verticillate or opposite 6. 5. spectabile 



lOB. Stamens as long as or slightly shorter than the petals; leaves alternate or opposite 7. 5. telephium var. purpureum 



6B. Flowers greenish white or greenish. 



IIA. Leaves sessile, rounded or obtuse at base; flowers 7—10 mm. across 8. 5. tstigaruense 



1 IB. Leaves more or less narrowed to a petiole or petiolelike base; flowers usually smaller. 



12A. Leaves verticillate, subacute to obtuse, dentate, impressed -punctate with scattered minute black spots. 



9. S. verticillatum 

 12B. Leaves alternate or opposite, rarely subverticillate, rounded to subobtuse, undulate-toothed to nearly entire. 

 13A. Plants glaucous; leaves 5-8 cm. long. 



14A. Stems rather stout, erect; lowest pair of branches on inflorescence rather elongate 10. 5. erythrostictum 



14B. Stems rather slender, ascending; lowest pair of branches of inflorescence rather short 11.5. o^uyamae 



13B. Plants brownish green. 



15A. Leaves usually alternate, rarely opposite, decurrent to a short petiole 12. 5. sordidum 



15B. Leaves opposite, abruptly and distinctly petiolate 13. S. viride 



5B. Flowers yellow. 



16A. Stems solitary or few, usually simple, 20-50 cm. long; leaves oblanceolate, 3-6 cm. long 14. S. aizoon 



I6B. Stems tufted, often branched at base, 7-20 cm. long; leaves obovate or broadly oblanceolate, 2—3.5 cm. long. 



15. S. \amtschaticum 

 4B. Plants without stout rhizomes; leaves more or less attached to the stem above the base, entire. 

 17 A. Leaves terete or only slightly flattened, linear to narrowly oblong. 

 18A. Leaves of fertile stems verticillate. 



19A. Leaves linear, gradually acute and scarcely flattened at apex; anthers conical-ovoid, 0.5-0.6 mm. long 16. 5. lineare 



19B. Leaves narrowly oblanceolate, narrowed and flattened toward the obtuse apex; anthers narrowly ovoid, 0.8-1 mm. long. 



17. 5. sarmentosum 

 18B. Leaves of fertile stems alternate. 



20A. Flowers solitary, terminal; leaves oblong-cylindric, 3-5 mm. long 18. S. uniflorum 



20B. Flowers few to many, in terminal cymes. 



21A. Petals 1.5-2 times as long as the sepals, spotless or with few brown short striations; leaves cylindric-oblong to lanceolate- 

 cylindric, 5-10 mm. or sometimes to 12 mm. long, obtuse. 

 22A. Inflorescence on lateral stems; leaves obovate-cylindric, rounded at apex; carpels ascending; on rocks near seashores. 



19. 5. oryzifoUum 

 22B. Inflorescence terminal on the main axis; leaves rather narrower, obtuse; carpels spreading; on rocks in lowlands and 



high mountains 20. 5. japonicum 



21B. Petals 2.5-4 times as long as the sepals, usually brown-striated; leaves linear, 10-20 mm. long. 



23A. Flowers 4-merous; leaves linear, obtuse; plant of shaded places on tree-trunks 21.5. hakpnense 



23B. Flowers 5-merous; leaves linear to oblanceolate-linear, obtuse to subobtuse. 



24A. Leaves broadly linear, verj' many and densely disposed on the stem 22. 5. polytrichoides 



24B. Leaves linear-spathulate, to about 4.5 mm. wide 23. 5. yabeanum 



17B. Leaves distinctly flattened, at least the sterile ones spathulate. 



25A. Perennial stoloniferous herbs; leaves entire or emarginate, smooth on margin; stems without bulbils in leaf -axils. 



26A. Leaves dimorphic, linear or only slightly broadened above on the flowering shoots, obovate on the vegetative shoots; petals 



as long as to slightly longer than the sepals 24. 5. subtile 



26B. Leaves nearly all alike, spathulate; petals 2-5 times as long as the sepals. 



27A. Carpels erect in fruit 25. 5. formosaniim 



27B. Carpels obliquely spreading or ascending in fruit. 



28A. Leaves on flowering shoots opposite 26. 5. ma\inoi 



28B. Leaves on flowering shoots alternate. 



29A. Leaves obtuse to rounded at apex; carpels 3-5 27. 5. tricarpum 



29B. Leaves emarginate; carpels 5 28. 5. tosaense 



25B. Annual or biennial herbs without stolons; leaves entire, somewhat uneven on the upper margin; reproducing by bulbils. 



29. 5. btilbijerum 

 3B. Plant either with spine-tipped leaves or with spicate inflorescence. 



30A. Inflorescence a few-flowered cyme; leaves 7-12 mm. long, 1.5-2.5 mm. wide 30. 5. leveilleanum 



30B. Inflorescence a many-flowered dense spike; leaves 2-8 cm. long, 4-40 mm. wide. 



31A. Leaves callose on upper margin, ending in a short spine, broadly linear, slightly flattened 31.5. erubescens 



