602 



BOTANY 



TART ir 



free stamens. Capsule dehiscing elastically. 



Itnpatiens noli tangere, I. parviflora, 

 and /. Balsamina. Regarding 

 the occurrence of cleistoganious 

 flowers in Irapatiens, cf. p. 499. 

 Mainly distributed in the tropics 

 of the old world. 



Family 6. Erythroxylaceae. 

 — Erthroxyhn Coca is a small 

 Peruvian shrub, with entire, 

 simple leaves and axillary groups 

 of small, white flowers. Petals 

 with appendages. Stamens 10, 

 united at the base into a tube, 

 G(3), but only one loculus of the 

 ovary is fertile. Fruit, a one- 

 seeded drupe (Fig. 605). The 

 family is especially abundant in 

 equatorial America. 



Official. — From E. Coca 



Fig. (iOO.— iiH<a (/rareolens(l iiat. size). 



Fig. 607. — Floral diagram of Citrv? 

 vulgaris. (After Eichler.) 



COCAE FOLIA, which yield 

 COGAINA, are obtained. 



Family 7. Zygophyllaceae. 

 — Typically pentamerous 

 flower with an intrastaminal 

 disc. 



Official. — Guiacum 

 officinale, a West Indian tree 

 with opposite, paripinnate 

 leaves. Ovary bicarpellary, 

 bilocular. Fruit winged. It 

 yields guiaci ligkum and 

 guiaci kesina. 



Family 8. Rutaceae. — 

 For the most part slirubs or 

 trees, rarely lierbs, with 

 alternate, pinnate leaves. 

 Flowers usually actino- 

 morphic, tetramei'ous or 

 ])entamerous with a large 



Fio. &)8.—Citrv.s vulgaris {h iiat. si/e). Officim.. 



