TAXONOMY 



393 



to greenish-yellow or white (Scrophularia) to pure white or from red 

 to purple to blue (Veronica). Stamens five, fertile, equal in length 

 in a few Verbascum species or unequal in other Verbascum species to 

 stamens four with a long sterile staminode (Pentstemon) to four 

 didynamous stamens with a short petal oid staminode (Scrophu- 

 laria) to four didynamous stamens with a minute often nectariferous 

 staminode (Linaria), to frequenty four didynamous stamens only, 

 the two lateral or two anterior stamens stronger and longer (An- 

 tirrhinum) to two perfect stamens and two minute staminodes 

 (Calceolaria) to two stamens alone developed (Veronica). Pistil bi- 

 carpellate; ovary two-celled with central placentation; style terminal 

 with bilobed stigma; ovules numerous, small. Fruit a two-celled 

 and usually many-seeded capsule. Seeds richly albuminous, 

 anatropous or amphitropous. 



Pedaliacece or Sesame Family. Tropical herbs often thickly 

 covered with viscous hairs. Leaves soft, usually alternate, more 

 rarely opposite, exstipulate. Flowers irregular, pentamerous. 

 Fruit a capsule (Sesamum, etc.), drupe, or rarely a one-seeded indehis- 

 cent nut. Seeds exalbuminous usually. 



Official drug Part used Botanical origin Habitat 



Oleum Sesami Fixed oil Sesamum indicum Asia and Africa 



(Benne Oil) (cultivated varieties) 



Acanthacece or Acanthus Family. Usually herbaceous (Ruellia), 

 ' rarely sub-woody or woody plants, occasionally bushy in habit, con- 

 taining cystoliths in the mesophyll or epidermal cells of the leaves 

 and in the parenchyma of the roots and stems. Leaves opposite, 



