326 
PHARMACEUTICAL BOTANY 
surrounded by an enlarged and more or less petaloid involucre. 
Flowers regular, rarely pentamerous, more frequently tetramerous; 
sepals usually four, small tooth-like or absorbed; petals usually 
four, small, greenish to yellowish to white ( Cornus florida), rarely 
pink or crimson; stamens four or five alternate to the petals and 
inserted with the sepals and petals epigynously around and between 
the nectar disc; pistil syncarpous, bicarpellate, rarely tricarpellate; 
ovary as many celled with one pendulous ovule in each cavity; 
style usually simple, ending in rounded or slightly bilobed stigma. 
Fruit a two-seeded drupe. Seeds albuminous. 
Official drug Part used Botanical origin Habitat 
Cornus N.F. Bark of root Cornus florida Eastern United 
States and 
Canada 
Sub-class b. — Sympetal.® (Gamopetal.® or Metachlamyde^e) 
A flivision of dicotyledonous plants in which the flowers possess 
both calyx and corolla, the latter with petals more or less united 
into one piece. 
I. Order Ericales. — Ericacece or Heath Family. — Sub-herbaceous 
(■ Chimaphila ), suffruticose {Erica), fruticose {Azaleas, Kalmias, 
etc.), rarely sub-arborescent {Arbutus unedo or Strawberry Tree) 
plants. Roots fibrous often saprophytically associated, rarely 
tuberous or more or less enlarged. Stem upright, ascending or creep- 
ing, more or less woody, rarely through saprophytic connection be- 
coming soft, annual and pale above ground {Monotropa uniflora ). 
Leaves alternate, simple, entire, exstipulate, rarely soft, delicate, 
herbaceous {Azaleas), usually leathery to wiry and evergreen, more 
rarely {Pterospora, Monotropa, etc.) becoming greenish-blue, bluish- 
yellow, yellowish-white to white and correspondingly saprophytic. 
Inflorescence typically a raceme {Pyrola, Andromeda, Gaylussacia, 
Erica, Arctostaphylos Uva Ursi, etc.) but raceme condensed into a 
racemose umbel {Azalea, etc.) or further reduced to a few flowers or, 
in the degraded saprophytic condition to one flower {Monotropa 
uniflora). Flowers regular, passing to irregular {Rhododendron) , 
pentamerous or tetramerous; sepals five to four rarely fewer, apo- 
to synsepalous, usually green, sometimes brightly petaloid; petals 
