Spiraea ROSACEAE Pr-unvs 



3. Spiraea blumei G. Don &$&&. (Chen Chu Hsiu Ch'iu; Pearl Geranium) (R.M. 

 333). Shrub, 5-10dm. high; fls. white, IV. Japan, Korea, China; locally in An., 

 Che., Ki., Ku. Brushland. 



4. Spiraea cantoniensis Lour. J#H1§E£ (Ma Yeh Hsiu Ch'iu; Hemp-leaved Geranium) 

 (R.M. 333). Shrub, to lm.; fls. white, V. China, Japan; locally in An., Ku. 

 Cultivated, ornamental. Fig. 151. 



5. Spiraea chinensis Maxim. $kMW:M (T'ieh Hei Han T'iao; Black-iron Branches) 

 (R.M. 334). Shrub, 1-2 m. high; fls. white, IV-V. Eastern China; locally in An., 

 Che., Hup., Ki., Ku. Brushland. 



II. Prunoideae Peach Subfamily ff ilif4 (Ying Ya K'o) 

 Shrubs or trees: hypanthium cup- shaped: ovary superior: fr. a drupe. 



4. Prunus Linn. Stone Fruits f^H (T'ao Shu) 



Trees or shrubs with stipulate usually serrate lvs. and white, red or pink 5- 

 merous fls. in fascicles or racemes; stamens numerous, perigynous: fr. a drupe. 200 

 species, in temperate regions; 125 in China. (The Latin name.) 



Key to the Species 

 a. Fr. deeply grooved. 



b. Winter buds solitary in the If. axils: stone neither pitted nor 



grooved. 



Fr. glabrous: lvs. oblong- or elliptic-ovate 1. P. salicina 



Fr. pubescent, at least when young: lvs. broadly orbicular- 

 ovate. 



Brts. reddish: stone smooth, more or less flattened 2. P. armeniaca 



Brts. greenish: stone pitted, not flattened i 3. P. mume 



bb. Winter buds 3 in the If. axils: stone pitted or furrowed. 



Stone large and more or less compressed 4. P. persica 



Stone small and nearly spherical 5. P. davidiana 



aa. Fr. not noticeably grooved. 



c. Fls. solitary or few in a cluster, 

 d. Axillary buds 3. 



e. Lvs. tomentose beneath 6. P. tomentosa 



ee. Lvs. glabrous or pubescent, not tomentose. 



Lvs. lanceolate; petioles 2-3 mm. long 7. P. glandulosa 



Lvs. ovate; petioles 3-5 mm. long. 



Lateral veins not extending to the leaf margins .. 8. P. humilis 



Lateral veins running to the leaf margins 9. P. japonica 



dd. Axillary buds solitary. 



f. Fls. before the leaves. 



Fls. white 10. P. pseiidocerasus 



Fls. light pink 11. P. subhirtella 



ff. Fls. with the lvs. 



g. Sepals erect or spreading. 



Pedicels, calyx and style glabrous. 



Serrations of the leaf acute or acuminate .... 12. P. serrulata 

 Serrations of the leaf ending in long teeth . . 13. P. serrulata 



var. lannesiana 



Pedicels, calyx and styles pubescent 14. P. yedoensis 



gg. Sepals reflexed: stipules persistent, linear, glandu- 



lar-fimbriate 15. P. dielsiana 



cc. Fls. small, in elongated racemes 16. P. perulata 



158 



