ROSACEAE 



543 



white, on very short pedicels; calyx short-pubescent; drupe 



tj'pically short-pilose, the stones very prominently rugose. 



Apr-May. A widely cultivated Chinese tree with many culti- 

 vars grown; said to be spontaneous in Kyushu. 



5. Prunus tomentosa Thunb. Cerastis tomentosa 

 (Thunb.) Wall.; P. trichocarpa Bunge; C. trichocarpa 

 (Bunge) Wall. YusurvV-ume. Shrub with dense pubes- 

 cence on young branchlets, petioles and underside of leaves; 

 leaves obovate, abruptly short-acuminate, 5-7 cm. long, 3-4 

 cm. wide, hairy on upper side, duplicately toothed, the petioles 

 2-5 mm. long; flowers 1 or 2, pale pink, small; ovary and 



calyx-lobes short-pubescent; drupe subglobose, red. Apr. 



Cultivated for the flowers and the edible fruit. China and 



Korea to the Himalayas. 



6. Prunus japonica Thunb. Cerastis japonica (Thunb.) 



Loisel. NiwA-uME. Shrub with slender elongate branches 



often puberulent while young; leaves ovate, rarely ovate- 

 lanceolate, 3-7 cm. long, acuminate, rounded or sometimes 

 cuneate at base, doubly acute-toothed, glabrous on both sides 

 or short-pubescent on nerves beneath, the stipules longer than 

 the petioles, laciniate, minutely toothed, the petioles 2-3 mm, 

 long; flowers appearing with tlie leaves, 2 or 3, small, white 

 or pale pink, single, the pedicels 5-10 mm. long; drupes sub- 

 globose. Apr. Cultivated shrub of Chinese origin. 



7. Prunus glandulosa Thunb. Cerasus glandulosa 

 (Thunb.) Loisel.; P. glandulosa var. glabra Koehne; P. ja- 

 ponica var. glandulosa (Thunb.) Maxim. Hitoe-no-niwa- 



ZAKURA. Deciduous shrub with slender, elongate, glabrous 

 or sometimes puberulent branches; leaves lanceolate to ovate- 

 oblong, 3-8 cm. long, gradually tapering above to a subobtuse 

 rip, glabrous on both sides or slightly puberulent on nerves 

 beneath, obtusely serrulate, the petioles 4-6 mm. long; flowers 

 1 or 2, small, single, white or pink, the pedicels 1-2 cm. long; 

 drupes red, about 1.2 cm. across. Apr.-May. Cultivated. 



8. Prunus apetala (Sieb. & Zucc.) Fr. & Sav. Ceraseidos 

 apetala Sieb. & Zucc; P. ceraseidos (Sieb. & Zucc.) Maxim.; 



P. crassipes Koidz. Chojizakura, Mejirozakura, Tani- 



NozoKi. Small tree with glabrescent or pilose branchlets; 

 leaves obovate or cuneate-obovate, 5-8 cm. long, 3-5 cm. wide, 

 caudately acuminate, spreading-pilose on both sides especially 

 on nerves beneath, dull, with short, rather obtuse to acute 

 coarse double teeth, the petioles 3-8 mm. long, spreading- 

 pilose; flowers 1-3, in sessile umbels, nodding, small, pink to 

 nearly white; calyx-tube slender, 7-10 mm. long, prominendy 

 pubescent, 3-4 times as long as the ovate lobes; petals 5-8 mm. 

 long, retuse; style with a few spreading hairs on the lower 

 part. Apr. Low mountains; Honshu, Kyushu. 



Var. pilosa (Koidz.) Wils. P. matsumurana Koehne; P. 

 ceraseidos sensu Koidz., non Maxim.; P. ceraseidos var. pilosa 



Koidz.; P. crenata Koehne Oku-chojizakura. Less 



prominently hairy on all parts; leaves acutely toothed, the 

 petioles 6-10 mm. long; flowers larger; calyx-tube 2 or 3 times 

 as long as the lobes; petals 8-12 mm. long; style usually gla- 

 brous. Mountain form especially abundant on the Japan 



Sea side of Honshu (centr. distr. and northw.). Grades into 

 the typical phase. 



9. Prunus incisa Thunb. Cerasus incisa (Thunb.) 



Loisel. Mamez.\kura. Small tree, the young branchlets 



sometimes pubescent; leaves obovate or ovate, 3-5 cm. long, 

 2-3 cm. wide, short-acuminate, pubescent on upper side and 

 on nerves beneadi, doubly acute-toothed, the petioles 8-10 

 mm. long; flowers 1-3, in sessile umbels, white to rose, on 



glabrous to thinly pubescent pedicels 1-2.5 cm. long; calyx- 

 tube usually glabrous, 5-6 mm. long, about twice as long as 



the lobes; petals about 10 mm. long, retuse. Apr.-June. 



Mountains; Honshu (centr. distr. and northw.). Forma 



yamadei (Makino) Ohwi. P. incisa var. yamadei Makino 



Ryokugaku-zakura, Midori-zakura. Young leaves, 



calyx, and pedicels green. 



Var. tomentosa Koidz. P. hisauchiana Koidz. ex Hisauchi 



Yabuzakora. Leaves larger, broader; calyx-lobes clearly 



serrulate. Low mountains; Honshu (w. Kanto Distr.). 



Var. kinkiensis (Koidz.) Ohwi. P. kjnkiensis Koidz. 



KiNKi-MAMEZAKURA. Differs from the typical phase in the 

 longer calyx-tube and slightly larger caudate leaves. Moun- 

 tains; Honshu (w. part of centr. distr. and westw.). 



Var. bukosanensis (Honda) Hara. P. nipponica var. 



bu\psanensis Honda Buko-mame-zakura. Leaves larger, 



broadly obovate, 5-8 cm. long, 3-5 cm. wide, glabrescent on 

 both sides. Mountains; Honshu (Mount Buko in Musashi). 



10. Prunus pendula Maxim, forma ascendens (Ma- 

 kino) Ohwi. P. pendula var. ascendens Makino; P. itosa\ura 

 var. ascendens (Makino) Makino; P. subhirtella var. ascendens 

 (Makino) Wils.; P. aequinoctialis Miyoshi; P. subhirtella var. 

 pendula forma ascendens (Makino) Ohwi; P. microlepis 

 Koehne; Cerasus herincqiana Lavall.; P. herincqiana (Lavall.) 

 Spaeth Edo-higan, Azuma-higan. Large tree with longi- 

 tudinally fissured bark, the branches elongate, rather slender, 

 light grayish brown, ascending-pilose while young; leaves 

 membranous, oblong to narrowly obovate, 6-12 cm. long, 3-4 

 cm. wide, caudately acuminate, with 10-14 pairs of obliquely 

 spreading parallel lateral nerves, subdouble-toothed, glabrous 

 to thinly ascending-pubescent on upper side, ascending- to ap- 

 pressed-pubescent beneath especially on nerves, the petioles 

 pubescent; flowers 2-5, in sessile umbels, pink, the pedicels 

 1.5-3 cm. long, with whitish ascending hairs; calyx-tube 

 slightly inflated at base, about 5 mm. long, more or less 

 pubescent; petals about 12 mm. long, retuse; style with few 

 spreading hairs on the lower part. Apr. Mountains; Hon- 

 shu, Shikoku, Kyushu; occasionally planted in parks and 



around temples. Cv. Pendula. P. pendula Maxim.; P. 



itosakjtra Sieb. nom. subnud.; P. herincqiana sensu C. K. 

 Schn. non Spaeth; P. subhirtella var. pendula (Maxim.) Y. 



Tanaka Itozakura, Shidarezakura. Branches pendulous. 



A much cultivated phase. 



The following are alleged hybrids: 



Prunus sieboldii (Carr.) Wittm. Cerasus sieboldii Carr.; 

 P. pseudocerasus var. sieboldii (Carr.) Maxim.; C. watereri 

 Lavall. ex Bean; P. pseudocerasus forma watereri (Lavall.) 

 Koehne; P. kpidzutnii Makino; P. fortis Koidz.; P. donarium 



subsp. jortis (Koidz.) Koidz. Naden. Small tree with 



dark grayish brown rather stout branches more or less spread- 

 ing-pubescent while young; leaves prominendy spreading- 

 pubescent, die glands small, at base of die blade, the pedicels 



pubescent; flowers semidouble. Alleged hybrid of Nos. 8 



and 16. 



Prunus yedoensis Matsum. Somei-yoshino. Small tree 

 with ascending-hairs on young branchlets, lower leaf surfaces, 

 inflorescence, and calyx; leaves vivid green; flowers single, 



precocious. Apr. Much planted on riverbanks and in 



parks. Alleged hybrid of Nos. 10 and 16. 



Prunus subhirtella Miq. P. miqueliana Maxim., pro 

 parte; P. l^ohigan Koidz.; P. subhirtella var. oblongijolia Miq.; 

 P. herincqiana var. ascendens C. K. Schn., excl. syn.; P. itosa- 



