ROSACEAE 



545 



on nerves, the petioles 3-5 cm. long; flowers 3-5, in umbels, 



white; calyx-tube contracted above. Apr.-May. Europe. 



The cultivated edible cherry. 



18. Pninus maximowiczii Rupr. P. bracteata Fr. & Sav. 



MiYAMAZAKURA. Small tree with rather prominent ap- 



pressed hairs on young branchlets, inflorescence, petioles, and 

 nerves of leaves beneath; leaves obovate or rhombic-elliptic, 

 gradually narrowed above or short-caudate, 4-8 cm. long, 

 2.5-6 cm. wide, coarsely and acutely double-toothed, appressed- 

 pilose to glabrate on upper side, the petioles 7-15 mm. long, 

 the glands on or near base of leaf-margin; flowers 4-7, in loose 

 corymbose racemes, white, small, the bracts ovate-orbicular, 

 persistent, 5-8 mm. long, toothed, the pedicels 10-15 mm. 

 long; calj'x-tube obconical, somewhat longer than the denticu- 

 late ovate lobes, pilose; style pilose or glabrous at base. 



June. Mountains; Hokkaido, Honshu, Kyushu. Sakhalin, 



Korea, Manchuria, and Ussuri. 



19. Prunus zippeliana Miq. P. macrophylla Sieb. & 



Zucc, non Poir. Bakuchi-no-ki. Evergreen tree with 



reddish brown exfoliating bark; leaves subcoriaceous, narrowly 

 ovate-oblong or -elliptic, 10-20 cm. long, 4-7 cm. wide, gradu- 

 ally narrowed to the tip, glabrous or thinly soft-pubescent 

 beneath, acutely toothed, the petioles 10-15 mm. long, with a 

 gland on each side at the top; racemes short, 1- to 5-nate, 

 densely many-flowered, nearly sessile, the bracts broadly del- 

 toid, caducous, with pale brown pubescence; flowers white, 

 6-7 mm. across, the rachis and pedicels with short spreading 

 hairs; caly-x-tube broadly obconical, slightly hairy, the teeth 

 shorter than the tube; petals reflexed, about 3 mm. long, 

 nearly orbicular; ovary glabrous, the style 3-3.5 mm. long; 

 drupe ovoid, about 18 mm. long, terminated by the persistent 



style base. Sept.-Oct. Honshu (warmer part of Kanto 



Distr. and westw.), Shikoku, Kyushu. Ryukyus and For- 

 mosa. 



20. Prunus spinulosa Sieb. & Zucc. Rinboku. Small 

 tree, the young branches often puberulent; leaves coriaceous, 

 lustrous, narrowly oblong to narrowly obovate, 5-8 cm. long, 

 1.5-3 cm. wide, caudate-acuminate with an obtuse or acute 

 tip, glabrous, more or less thickened on margin, remotely 

 toothed or endre, the teeth ascending to obliquely spreading, 

 spine-tipped, the petioles 5-10 mm. long, glabrous; inflores- 

 cence 2-8 cm. long, rather densely many-flowered, puberulent 

 only while young, glabrescent, nearly sessile, the bracts ca- 

 ducous; flowers white, about 6 mm. across, the pedicels 3-7 

 mm. long; calyx-tube broadly obconical, longer than the 

 loosely toothed ovate lobes; petals orbicular, about 3 mm. long, 

 reflexed; drupes ellipsoidal or broadly ovoid, glabrous, about 



8 mm. long. Sept.-Oct. Warmer parts; Honshu (Kanto 



Distr. and westw.), Shikoku, Kyushu. Ryukyus. 



21. Prunus ssiori F. Schmidt. Shurizakura, Miyama- 

 iNUZAKURA. Deciduous tree with glabrous branchlets; leaves 

 oblong to ovate, 7-15 cm. long, 3-7 cm. wide, long-acuminate, 

 usually cordate at base, glabrous except for axillary tufts of 

 hairs beneath, serrulate with narrow, acute, simple or some- 



times double small teeth, the glands near the top of the peti- 

 ole; racemes 15-20 cm. long, rather densely many-flowered, 

 glabrous, with few small leaves at base; flowers small, white, 

 about 10 mm. across, the pedicels 7-10 mm. long; calyx with 

 cup-shaped tube, the teeth short, semi-rounded, with minute 

 glandular teedi; petals spreading, elongate-orbicular, 4-5 mm. 

 long, nearly as long as die stamens, loosely toothed. May- 

 June. Woods in mountains; Hokkaido, Honshu (centr. distr. 

 and northw.). Sakhalin, Manchuria, Ussuri, and s. Kuriles. 



22. Prunus padus L. P. racemosa Lam.; Padus race- 

 mosa (Lam.) C. K. Schn. Ezo-no-uwa-mizuzakura. De- 

 ciduous tree; leaves obovate to elliptic or narrowly obovate, 

 5-9 cm. long, 3-6 cm. wide, abruptly acuminate, obtuse to 

 rounded at base, acutely toothed, glabrous or with few axillary 

 tufts of hairs beneath, the pedoles 10-15 mm. long, glabrous, 

 with glands at the top; racemes 10-12 cm. long, rather many- 

 flowered, glabrous to puberulent; flowers white, 12-15 mm. 

 across, die pedicels 8-12 mm. long; calyx with broadly ob- 

 conical tube, the lobes ovate, glandular-toothed; petals 5-6 

 mm. long, orbicular, loosely toothed; stamens short. May- 

 July. Hokkaido. Korea, Sakhalin, and widely distributed 



in temperate regions of the Old World. 



23. Prunus grayana Maxim. P. padus var. japonica 



Miq.; Padus grayana (Maxim.) C. K. Schn. Uwa-mizu- 



zakura. Tree with puberulent or glabrous young branches; 

 leaves ovate to ovate-oblong, 6-10(-15) cm. long, 2.5-4.5(-5.5) 

 cm. wide, caudate to abruptly acuminate, glabrous on bodi 

 sides or pilose along the midrib beneath while young, acutely 

 toothed, the pedoles 6-8 (-10) mm. long, glabrous or puberu- 

 lent while young; racemes 12-20 cm. long inclusive of short 

 few-leaved peduncles, rather dense, many-flowered, glabrous 

 or puberulent on rachis; flowers white, 6-8 mm. across, the 

 pedicels 3-10 mm. long; calyx widi obconical tube, the teeth 

 deltoid, short, pilose inside; petals suborbicular, about 3 mm. 

 long; stamens longer than the petals; drupe ellipsoidal, acute, 



6-7 mm. long, black. Apr.-June. Hills and mountains; 



Hokkaido, Honshu, Shikoku, Kyushu. Plants of the north- 

 ern part of the range generally have larger leaves and more 

 pilose calyx-teedi than those in the southern part of the dis- 

 tribution. 



24. Prunus buergeriana Miq. Laurocerasus buergeri- 



ana (Miq.) C. K. Schn. Inuzakura, Shirozakura. Tree, 



usually the branches puberulent when young; leaves charta- 

 ceous, somewhat lustrous, ovate-oblong to cuneatc-oblong, 5-10 

 cm. long, 2-3.5 cm. wide, acuminate with an acute or sub- 

 obtuse dp, with apprcssed or ascending minute teeth, glabrous 

 on both sides except for pubescence along the midrib near the 

 base beneath while young, the pedoles 8-25 mm. long, some- 

 times puberulent on the upper side; racemes 5-10 cm. long, 

 rather loosely flowered, puberulent; flowers white, about 5 

 mm. across; calyx with cup-shaped tube, the teeth short, 

 broadly ovate, sometimes loosely toothed; petals broadly obo- 

 vate, 2-3 mm. long, shorter than the stamens. Apr.-June. 



Hills and mountains; Honshu, Shikoku, Kyushu. 



21. CRATAEGUS L. Sanzashi Zoku 



Shrubs or trees, branchlets often diornlike; leaves pedolate, alternate, simple to 3-lobed or pinnarifid, the stipules usually 

 small, deciduous; cymes or corymbs terminal; flowers white or reddish; calyx urceolate or campanulate, the teeth 5; petals 5; 

 stamens many; ovary inferior or semi-inferior, 1- to 5-locular; styles 1-5; ovules 2 in each locule, erect; drupes subglobose, red 



to black, sometimes yellow, small, the stones bony; seeds solitary in each locule, erect, flat. A large complicated genus of the 



N. Hemisphere, especially abundant in e. N. America. 



