Pyrus ROSACEAE-LEGUMINOSAE Amelanchier 



2. Pyrus betulaefolia Bunge ^ (T'ang Li; Small-fruited Pear) (R.M. 405). Tree, 

 to 10m.; fls. white, small, IV; fr. brown, small. Northern China ; locally in An., 

 Ku. Woodland. 



3. Pyrus pyrifolia (Burm.) Nakai #>0g (Sha Li; Sand Pear) (R.M. 405). Tree; fls. 

 large, fr. brown. Central and western China; locally in Ki., Ku. Cultivated, fruit. 



4. Pyrus serrulata Rehd. j#^i^ (Ma Li Tzu; Pock-marked Pear) (R.M. 404). Tree; 

 fls. white, III— IV; fr. brown, subglobose, 1.5-2 cm. long. Central China; locally 

 in Ki. Rocky slopes. Fig. 165. 



5. Pyrus calleryana Decne. Callery's Pear Sirl^ (Tou T'an Li; Sweetbean Pear) 

 (R.M. 405). Shrub or tree, 1-3 m. high; fls. white, IV; fr. brown, X. China; 

 locally in An., Ki., Ku. Brushland. 



25. Amelanchier Medic. Shadbush jgsfctH (T'ang Ti Shu) 



Deciduous shrubs or trees: lvs. with nearly straight veins: fls. white, in terminal 

 racemes; calyx tube campanulate, with 5 short lobes; petals 5: fr. a small berry-like 

 pome, incompletely 4-10-celled, with one seed in each cell. About 25 species, chiefly 

 in North America, a few in Eurasia; 1 in China. (Provencal name of A. ovalis.) 



1. Amelanchier asiatica (S. & Z.) Endl. var. sinica Schneid. fH%$. (T'ang Ti; Wild 

 Plum) (R.M. 388). Tree, to 13 m.; fls. V; fr. a small berry-like pome, IX. China; 

 locally in An., Hup., Ki. Woodland. 



81. LEGUMINOSAE Bean Family mM (Tou K'o) 



Herbs, often vines, shrubs or trees with alternate stipulate compound or simple Ivs.: 

 fls. irregular or regular, mostly perfect; sepals and petals usually 5; stamens usually 

 10, diadelphous, 9 and 1, monadelphous or distinct; ovary superior, 1-celled, becoming 

 a legume in fr., sometimes indehiscent: 500 genera with 12,000 species, widely distri- 

 buted, especially in the tropics; over 80 genera and more than 300 species in China. 



Key to the Genera 



A. Fls. small and regular, in dense heads or spikes; petals valvate: Ifts. 

 oblique I. Mimosoideae. 

 Stamens united at the base: pods glabrous and non-septate: trees 1. Albizzia 

 Stamens distinct: pods prickly, breaking into 1-seeded joints: herbs 2. Mimosa 

 A A. Fls. somewhat irregular or clearly papilionaceous; petals imbricate. 

 B. Fls. slightly irregular; upper petals enclosed by the others in 

 the bud II. Caesalpinioideae. 



C. Lvs. simple and with entire margins 3. Cercis 



CC. Lvs. pinnately compound, or twice pinnate. 

 D. Plants armed with thorns ot prickles. 



Thorns large and branched : pods flat 4. Gleditsia 



Thorns small iecurved prickles: pods oblong 5. Caesalpinia 



DD. Plants unarmed. 



Pods many-seeded: herbs 6. Cassia 



Pods few-seeded : trees 7. Gymnocladus 



BB. Fls. definitely papilionaceous; petals valvate III. Papilionoideae. 

 E. Stamens distinct. 



F. Lvs. pinnately compound: trees (Sophoreae). 



Pods constricted between the seeds: stamens equal: 



lfts. membranous: seeds not scarlet 8. Sophora 



Pods oblong to linear, 2-valved, not constricted. 

 Stamens free, unequal: lfts. coriaceous: seeds 



173 



