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 petaloid 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. 
Official drug 
Digitalis 
Leptandra N.F. 
Verbasci Flores 
N.F. 
Part used 
Leaves 
Rhizome and 
roots 
Corollas with 
stamens 
Verbasci Folia N.F. Leaves 
Botanical origin 
Digitalis purpurea 
Veronica virginica 
Verbascum 
phlomoides 
Verbascum 
thapsiforme 
Verbascum Thapsus 
and other species of 
Verbascum 
Habitat 
Europe 
United States and 
Canada 
■ Europe and Asia 
Europe and Asia 
PedaliacecB 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, 
