ROSACEAE 519 



1. STEPHANANDRA Sieb. & Zucc. Kogome-utsugi Zoku 



Deciduous shrubs; leaves alternate, petioled, simple, with irregular toothlike incisions, often slightly lobulatc; stipules leaflike, 

 persistent; inflorescence a terminal, corymbose panicle; flowers small, bisexual, ebracteolate, the pedicels bracteate at base; calyx 

 persistent, cup-shaped, the teeth 5, ovate-deltoid, slightly imbricate in bud; petals 5, spathulate, small, white; stamens 10 to 

 many, inserted on the throat of the calyx-tube, incurved; disc hairy; carpels solitary, hairy; style terminal, filiform; ovules 

 pendulous, nearly apical; fruit a small hairy follicle enclosed in the calyx, 1- or 2-seeded; seeds rather small, subglobose, with 

 abundant endosperm. Few species, in the temperate regions of e. Asia. 



lA. Stamens 10; leaves 3-6 cm. long, subpinnatcly cleft, with 4-6 pairs of lateral nerves; calyx-tecth elliptic, obtuse to rounded at apex. 



1 . 5. inciia 

 IB. Stamens about 20; leaves 5-9 cm. long, shallovvly lobcd, with 6-8 pairs of lateral nerves; calyx-teedi ovate-deltoid, cuspidate. 



2 . S. tanalioe 



1. Stephanandra incisa (Thunb.) Zabel. Spiraea incisa in low mountains; Hokkaido (Hidaka Prov.), Honshu, Shi- 



Thunb.; Spiraea flcxuosa Sieb. & Zucc. Kogome-utsugi. koku, Kyushu; common. Korea. 



Much-branched shrub with slender terete nearly glabrous 2. Stephanandra tanakae Fr. & Sav. Kana-utsugi. 



branchlets; leaves broadly deltoid-ovate, slightly pilose to Resembles the preceding, the branches slightly stouter, flexu- 



nearly glabrous, caudately acuminate, whitish green beneath, ous, glabrous; leaves shallowly 3- to 5-lobed, with incised acute 



pinnately cleft to lobed, incised and toothed, 3-6 cm. long, teeth, glabrous on upper side, slighriy pubescent on nerves 



2-3.5 cm. wide, the petioles 4-8 mm. long; supules linear to beneath, 5-9 cm. long, 3.5-6 cm. wide, caudate-acuminate at 



broadly lanceolate, ascending, 1.5-7 mm. long; inflorescence apex, the petioles 10-15 mm. long, slighdy pubescent; stipules 



paniculate, terminal on young branches, 2-6 cm. long, many- 5-12 mm. long; inflorescence glabrous, 4-10 cm. long, flowers 



flowered; flowers creamy white, 4-5 mm. across; bracts cadu- slightly larger than in S. incisa. May-June. Mountains; 



cous, broadly linear; petals slightly longer than the calyx; Honshu (Kinki, Tokaido, and Kanto Distr., and Ugo Prov.) ; 



fruiting carpels globose, short-pubescent, about 2 mm. long; rare, 



seeds shining, about 1.5 mm. across. May-June. Thickets 



2. SPIRAEA L. Shimotsuke Zoku 



Shrubs or semishrubs; leaves alternate, usually simple, toothed; stipules often indistinct; flowers white to rose, small, in 

 racemes, cymes or panicles; calyx persistent, with 4 or 5 teeth; petals small, usually as many as the sepals, sometimes many, in- 

 serted on the throat of the calyx-tube; stamens 20-60; disc thickened, adnate to the calyx-tube; carpels usually 5, inserted at the 

 base of the calyx, free or connate at base; styles terminal; ovules many to few; follicles dehiscent on inner side, seeds pendulous, 

 without endosperm. About 100 species, in the temperate to cold regions of the N. Hemisphere. 



lA. Inflorescence umbellate. 

 2A. Inflorescence sessile on last year's branchlets, without leaves at base. 

 3A. Leaves broadly lanceolate to elliptic or ovate. 



4A. Leaves broadly lanceolate to narrowly ovate-oblong, glabrous or nearly so; flowers single 1.5. jaiirieana 



4B. Leaves ovate or broadly so, pilose beneath; flowers usually double 2. 5. prtinijoUa 



33. Leaves linear-lanceolate 3. 5. thunbergii 



2B. Inflorescence peduncled or subsessile, terminal on the current year's leafy branchlets. 



5A. Calyx-lobes reflcxed after anthesis; stamens longer than the petals; axis of inflorescence more or less distinct. 



6A. Leaves oblong to elliptic, entire or with few teeth toward the tip; branches more or less terete 4.5. media var. sericea 



6B. Leaves ovate, with doubly incised-serrate margin on upper half; branches distinctly angled. . . 5. 5. chamaedryjolia var. pilosa 

 5B. Calyx-lobes erect or spreading, but not reflexed in fruit. 



7A. Buds flat, outer bud scales longer; leaves entire or with 2 or 3 teeth near the tip; inflorescence with a rather distinct axis. 



6. S. nipponica 

 7B. Buds terete, outer bud-scales shorter than the inner; leaves usually distinctly toothed, sometimes lobulate. 



8A. Leaves acute, rhombic-lanceolate, glabrous 7. 5. cantoniensis 



8B. Leaves obtuse to rounded at apex, flabellate-orbicular to rhombic -ovate, glabrous to pubescent. 



9A. Leaves glabrous or nearly so, obtuse to subroundcd at apex 8. 5. blumei 



9B. Leaves pubescent beneath, obtuse to subacute at apex; nerves and veinlets impressed above, raised beneath. . . 9. 5. nervosa 

 IB. Inflorescence a compound corymb or panicle. 



lOA. Inflorescence a flat-topped to convex compound corymb. 



1 1 A. Leaves obtuse; inflorescence convex at top 10. 5. betulijolia 



IIB. Leaves acute to acuminate; inflorescence flat-topped. 



I2A. Leaves thinly membranous, glabrous, concolorous; inflorescence on short branches of the current year, these rising usually from 



arcuate elongate branches of the preceding year 11. S. miyabei 



12B. Leaves membranous to coriaceous, pubescent to subglabrate and pale green to glaucous beneath 12. 5. japonica 



lOB. Inflorescence a panicle 13. 5. salicifolia 



1. Spiraea faurieana C. K. Schn. S. pruniflora Honda 6-12 mm. wide, acute, sometimes subobtuse, cuneate at base, 



Ezo-No-sHijiMiBANA, Ko-sHi jiMiBANA. Shrub; branches serrulate except on the lower margin, nearly concolorous, gla- 



more or less angled, glabrous or short-pubescent while young; brous or sparingly pubescent while young, pennincrved, the 



leaves broadly lanceolate, sometimes oblong, 2.5-4 cm. long, petioles 1-2 mm. long; inflorescence 4- to 6-flowercd, with few 



