tmpatiens 



BALSAMlNACEAh-kllAMNACEAE 



Berchemia 



Key to the Species 



Lvs. lanceolate; margins coarsely serrate: spur of the fl. very slender, 



less than 1 mm. thick 1- I. balsamiva 



Lvs. ovate to oblong, acuminate; margins crenate; crenis apiculate: spur 



of the fl. thicker, 1.5 mm. thick , . 2. /. furcillata 



1. Impatiens balsamina Linn. Garden Balsam B.i\l\tt (Feng Hsien Hua; Phoenix- 

 fairy Flower) (B.M. 643). Erect annual, to 1 m.; fis. white, red or yellow, VIII; 

 capsule explosive. Tropical and subtropical eastern Asia; locally in An., Ki., Ku. 

 Planted, ornamental. Fig. 224. 



2. Impatiens furcillata Hemsl. (F.H.E. 1:101). Weak-stemmed annual; fis. yellow 

 or purple, VIII. Korea, China; locally in Che., Hun. Streamsides. 



103. RHAMNACEAE Buckthorn Family S^|4 (Shu Li K'o) 

 Trees and shrubs or rarely herbs, often spiny, sometimes climbing, with mostly 

 alternate simple stipulate lvs.: fis. small: calyx lobes valvate; petals sometimes want- 

 ing; stamens 5 or 4, opposite the petals; disk present: fr. drupaceous, winged or 

 capsular. About 45 genera with 550 species, temperate and tropical; 10 genera and 

 over 80 species in China. 



Key to the Genera 



A. Lvs. not 3-nerved: fr. a drupe. 



B. Fr. oblong or cylindrical, with a single stone. 



Twining shrubs: lvs. ovate, entire, with conspicuous parallel 



veinlets 1 • Berchemia 



Erect shrubs or trees: lvs. obovate, serrulate, not so conspicu- 

 ously nerved 2. Rhamnella 



BB. Fr. subglobose, with 2-4 nutlets. 



Fis. sessile or nearly so: lvs. mostly opposite 3. Sageretia 



Fis. pedicelled: lvs. alternate or opposite 4. Rhamnus 



AA. Lvs. 3-nerved from the base. 



Brs. of the frtg. infl. fleshy: plant not spiny 5. Hovenia 



Brs. of the infl. not fleshy: plants armed. 

 Fr. dry, with a leathery exocarp expanding into a flat circular 



wing 6. Paliurus 



Fi . fleshy, a cylindrical drupe with a sharply pointed stone 7. Zizyphus 



1. Berchemia Neck. Supple Jack &j#$£|| (Kou Erh Ch'a Shu; 



Hook-tea Genus) 

 Deciduous twining shrubs with alternate ovate entire conspicuously pcnnincrved 

 lvs.: infl. of terminal panicles: fis, perfect, 5-merous; ovary superior, 2-celled: fr. 

 oblong or cylindric, a drupe with a 2-celled stone. 12 species, in Asia, Africa and 

 North America; 10 in China. (Presumably named for Berthout van Berchem, 18th 

 century Dutch botanist.) 



Key to the Species 



Infl. a broad panicle, 20-25 cm. in diam. at the base, about 20 cm. high, 

 above the lvs.: lvs., 6-9 cm. long; petioles, or some of them, over 

 20 mm. long. 

 Lf. blades glabrous and glaucous beneath, often acute, sometimes 



pubescent along the nerves 1. B . floribunda 



236 



