ROSACEAE 



521 



Japon., non Bunge; S. ki'tsiana Nakai Ibuki-shimotsuke. 



Shrub; branches not angled, short-pubescent while young; 

 leaves ovate to broadly so or rhombic-oblong, 2-4 cm. long, 

 8-20 mm. wide, obtuse to subacute at apex, cuneate, obtuse, or 

 rounded at base, irregularly incised-toothed, sometimes obso- 

 letely 3-lobed, pubescent above while young, with pale yellow- 

 ish appressed pubescence beneath, the nerves and veinlets 

 impressed above, prominently raised beneath, the petioles 3-6 

 mm. long, pubescent; inflorescence solitary on short branch- 

 lets, short-pubescent, rather many-flowered; pedicels 10-15 

 mm. long; flo^vers white, 6-8 mm. across; calyx pubescent, 

 the teeth spreading, deltoid, acute, thinly puberulent with 

 short brownish soft hairs or nearly glabrous within; disc 

 short-pubescent; fruiting carpels glabrous or hairy on ventral 

 side. Apr .-June. Honshu (Kinki Distr.), Shikoku, Kyu- 

 shu. 

 Var. angustifoHa (Yatabe) Ohwi. .S. dasyantha var. an- 



gtisti folia Yatabe; S. chinensis Maxim.; S. yatabci Nakai 



HosoBA-No-iBUKi-sHiMOTsuKE, To-SHiMOTsuKE. Fruiting car- 

 pels thinly hairy all over. Honshu (Kinki Distr. and 



westw.), Shikoku, Kyushu. China. 



10. Spiraea betulifoHa Pall. Maruba-shimotsuke. 

 Shrub; young branches slighdy striate, glabrous or sparingly 

 pubescent; leaves obovate to broadly obovate or orbicular- 

 ovate, 15-50 mm. long, 10-40 mm. wide, rounded to obtuse at 

 apex, usually broadly cuneate, sometimes rounded or truncate 

 at base, toothed except near base, pale green to slightly glau- 

 cous beneath, the nerves pinnate, the petioles glabrous, 1-3 

 mm. long; inflorescence terminal, many-flowered, glabrous or 

 with thin rather long pubescence while young; flowers white, 

 5-8 mm. across; calyx-teeth deltoid, reflexed in fruit; petals 

 ovate-orbicular, shorter than the stamens; nectaries prominent; 



fruiting carpels glabrous or slightly pilose within. July- 



Aug. High mountains; Hokkaido, Honshu (n. and centr. 

 distr.) ; rather common. e. Siberia, Sakhalin, and Kuriles. 



Var. aemilJana (C. K. Schn.) Koidz. S. acmiliana C. K. 

 Schn.; S. betulijolia subsp. aemiliana (C. K. Schn.) Hara; S. 



stevenii Rydb.; 5. beaiwerdiana C. K. Schn. Ezo-no-maru- 



BA-sHiMOTsuKE. Smaller in all parts; young branches usu- 

 ally more or less short-pubescent; leaves broad, rounded at 

 base, 7-15 mm. long, 8-18 mm. wide, the veinlets impressed 

 above; inflorescence smaller, usually short-pubescent; flowers 



3-5 mm. across. July-Aug. High mountains; Hokkaido. 



Kuriles and Kamchatka. Forma glabra (Hara) Ohwi. 



S. betulijolia var. glabra (Hara) Hara; S. aemiliana var. glabra 

 Hara. Plant glabrous. 



11. Spiraea miyabei Koidz. Ezo-no-shirobana-shimo- 



TsuKE. Shrub; young branches angled, glabrous or nearly 

 so; leaves concolorous, broadly lanceolate to narrowly ovate, 

 3-7 cm. long, 1-3 cm. wide, acuminate, cuneate at base, doubly 

 toothed on margin with acute incised teeth, loosely white- 

 pilose on midrib beneath near base and on margin when 

 young, the petioles 4-6 mm. long, glabrous; inflorescence 

 terminal on short young branchlets from last year's branches, 

 many-flowered, short-pubescent; flowers white, about 8 mm. 

 across; calyx glabrous, die teeth reflexed, deltoid, acute; petals 

 orbicular, about half as long as the stamens; fruiting carpels 



with short spreading-hairs. Apr. Hokkaido (sw. distr.), 



Honshu (n. distr.) ; rare. 



12. Spiraea japonica L. f. S. callosa Thunb.; 5. albi- 



flora (Miq.) C. K. Schn.; S. callosa var. albiflora Miq. 



Shimotsuke. Shrub; branches usually not or scarcely angled, 

 glabrous or pubescent; leaves lanceolate to ovate, sometimes 

 broadly ovate, 1-8 cm. long, 0.8^ cm. wide, acute to acumi- 

 nate, rounded to narrowly cuneate at base, irregularly and 

 loosely acute-toothed or incised-toothed, pale green to glaucous 

 beneath, glabrous on both sides or pubescent beneath, the 

 petioles 1-5 mm. long, glabrous to pubescent; inflorescence 

 flat-topped, often lobed, rather large to small, sometimes short- 

 pubescent, densely many-flowered; flowers pale pink, rarely 

 white, 3-6 mm. across; calyx-teeth deltoid, erect, later ob- 

 liquely spreading, acute; stamens longer than the petals; disc 



with nectary glands on the margin; fruit glabrous. May- 



Aug. Mountains; Hokkaido, Honshu, Shikoku, Kyushu; 



rather common and very variable. Korea, China to the 



Himalayas. 



Var. buUata (Maxim.) Makino. S. bullata Maxim. Ko- 



sHiMOTsuKE. Small pubescent shrub; leaves small, broadly 



ovate, bullate above; flowers small, without glands. Rarely 



cultivated in our area, not known as a wild plant, possibly of 

 garden origin. 



13. Spiraea salicifolia L. Hozaki-shimotsuke. Shrub; 

 young branches slighdy angled, pubescent on upper portion; 

 leaves rather thinly chartaceous, lanceolate to broadly lanceo- 

 late, 3-10 cm. long, 1-3 cm. wide, acuminate to acute, usually 

 acutely duplicate-toothed, slightly pubescent on upper side 

 while young, the petioles 1-3 mm. long; inflorescence terminal, 

 densely many-flowered, 7-15 cm. long, short-pubescent; flow- 

 ers pink, 5-7 mm. across; calyx pubescent, the teeth deltoid, 

 acute, erect; stamens much longer than the petals; ovary gla- 

 brous. July-Sept. Wet boggy places in mountains; Hok- 

 kaido, Honshu (n. and centr. distr.). Distributed through- 

 out the cold regions of the Old World. 



3. SORBARIA A. Br. Hozaki-nana-kamado Zoku 



Deciduous shrubs; leaves large, alternate, petiolate, pinnate, the leaflets toothed, the stipules persistent; inflorescence a large 

 terminal panicle; flowers small, white; calyx cup-shaped, the teeth 5, deltoid or rounded, short, reflexed; petals 5, suborbicular; 

 stamens 20-50, inserted on die throat of the calyx-tube; carpels 5, opposite the calyx-lobes, connate at base; follicles ventrally 

 dehiscent; seeds without endosperm. More than 10 species, in the temperate regions of the Old World. 



1. Sorbaria sorbifolia (L.) A. Braun var. stellipila 



Maxim. S. stellipila (Maxim.) C. K. Schn. Hozaki-nana- 

 kamado. Young branchlets usually stellate-pilose; stipules 

 lanceolate to narrowly ovate, toothed; leaves 15-30 cm. long, 

 minutely puberulent on petioles and axis, the pinnae 15-23, 

 membranous, lanceolate or broadly so, 4-10 cm. long, 8-30 

 mm. wide, acuminate, acutely duplicate-toothed, more or less 

 stellate-pilose beneath; panicles 10-20 cm. long, densely many- 



flowered, stellate-pilose, becoming glabrous; flowers white, 7-8 

 mm. across; stamens longer than the petals; styles about 2.5 



mm. long; fruit 4-6 mm. long, pubescent. July-Aug. 



Hokkaido, Honshu (centr. and n. distr., rare). Forma 



incerta (C. K. Schn.) Kitag. 5. stellipila var. incerta C. K. 

 Schn. Ezo-hozaki-nana-kamado. Stellate hairs on under- 

 side of leaves deciduous at anthesis. The typical phase occurs 

 in nw. Asia. 



