PHANEROGAMIA 



611 



an annual, and bears numerous blue flowers, which last only a short time, in 

 racemose cincinni. The flower has five, free styles. The stem bears numerous 

 small, narrow leaves. The bast-fibres after proper preparation are woven into 

 linen. The seeds yield oil. 



OFFICIAL. LINUM, the seeds of Linum usitatissimum. 



Family 5. Balsaminaceae. Succulent herbs, with translucent stems, some- 

 times swollen at the nodes, and simple leaves. Flowers zygomorphic with five 

 free stamens. Capsule 

 dehiscing elastically. Im- 

 patiens noli tangere, I. 

 parvifiora, and /. Bal- 

 samina. Regarding the 

 occurrence of cleistogam- 

 ous flowers in Impatiens 

 cf. p. 518. 



Family 6. Erythroxy- 

 laceae. Erythroxylon 

 Coca is a small Peruvian 

 shrub, with entire, simple 



Fid. 648. Linum usitatissimum. A, 

 Flower ; B, androecium and gynae- 

 ceum ; C, capsule after dehiscence. 

 (A , nat. size ; B, C, x 3). OF- 

 FICIAL. 



F;<;. 6W.Erythroxi/lon Coca. (|j nat. size.) OFFICIAL. 



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. 649). 



OFFICIAL. From E. coca COCAE FOLIA, which yield COCAIXA, are obtained. 



Family 7. Zygophyllaceae. Floral formula typically K5, C5, A 5 + 5 G(5); 

 with an intrastaminal disc. 



OFFICIAL. Guiacum qfficinalc, a "West Indian tree with opposite, paripinnate 

 leaves. Ovary bicarpellary, bilocular. Fruit winged. It yields GUIACI LIGNUM 

 and GUIACI RESINA. 



Family 8. Rutaceae. For the most part shrubs or trees, rarely herbs, with 



2 R 1 



