350 



PHARMACEUTICAL BOTANY 



pinnatifid, as in Ruta graveolens, or pinnate, as lower parts of Ruta 

 graveolens, becoming reduced pinnate in Citrus Aurantium. Leaves 



exstipulate or with spiny stipules 

 (Xanthoxylum). Stems and leaves 

 abound in more or less sunken 

 glands. Flowers pentamerous, vary- 

 ing in color from yellow in Ruta to 

 white in Citrus to pink (Barosma 

 betulina) or pink crimson as in some 

 Barosma and Diosma species, rarely 

 to pinkish-purple (Pilocarpus} ; 

 sepals five, aposepalous becoming in 

 Citrus more or less synsepalous; 

 petals five, apopetalus becoming 

 more or less synpetalous and tubular 

 (Correa grandiflora) ; stamens five, 

 simple or with expanded bases, 

 lobed, or lobes developed as stami- 

 nal stipules and more or less split 

 (Citrus}-, pistil of ten, five, three or 

 two carpels, ovary as many-celled. 

 Fruit a capsule (Dittany, Xanthoxy- 

 lum}, berry (Citrus] or rarely a 

 samara (Ptelea). Seeds albuminous 

 or exalbuminous. Many of the 

 plants contain volatile oils in their 

 secretory cavities. 



PIG. 207. Barosma 

 Branch and flower. 



betulina 

 (Sayre.) 



Pilocarpus 



Buchu 



Leaflets 



Leaves 



Botanical origin 



Citrus Aurantium 

 sinensis 



Citrus Aurantium Northern India 

 amara 



Citrus medica 

 Limonum 



Pilocarpus Jaborandi 

 Pilocarpus 

 microphyllus 



.Barosma betulina 

 and B.serratifolia 



Habitat 



Sub-tropics 



Northern India 



Brazil 



Cape Colony 



