589 
THE DICOTYLEDONS 
OrrFiciAL DruG Part UsEpD BoTANICAL ORIGIN HABITAT 
Strophanthus Seed (deprived of awn) oes eee { Attica 
Strophanthus hispidus 
Strophanthin —_Glucoside Strophanthus Kombé Africa 
Apocynum Rhizome and roots Apocynum United States 
cannabinum and Canada 
UnorrFiciAL DruGc 
Aspidosperma Bark Aspidosperma Argentine 
Quebracho blanco Republic 
ASCLEPIADACE OR MILKWEED Fami_y.—Herbs or shrubs 
containing a milky juice, many 
species yielding rubber. Leaves 
entire, more or less fleshy, some-. 
times verticillate. Inflorescence 
usually a dichasial or scorpioid 
cyme. Flowers regular, pen- 
tamerous; sepals woolly, small, 
synsepalous; petals five, rarely 
four, synpetalous, elongated into 
awls; the corolla varying in shape 
from stellate to campanulate and 
in color from pale green to 
yellow, to greenish-brown, choc- 
olate, or from white to yellow, to - 
scarlet, to crimson, to purple, to 
blue; stamens five, epipetalous, 
fused in relation, forming a cylin- 
drical swollen mass around the 
central pistil; filaments flattened 
and furnished with a crown 
having various appendages; 
anthers two-celled, each cell con- 
taining a pollen mass (pollinium), 
the 
Fic. 447.—Asclepias tuberosa, 
Pleurisy-root or Orange Milkweed. 
The medicinal root, to left, is orange 
brown and devoid of latex. Note the 
alternate leaves and terminal cymes of 
unbels, which bear orange-colored 
flowers. To right, stem bearing follicles 
two of which are discharging their seeds. 
(Reproduced from U. S. Dept. Agric. 
Miscellaenous Publication 77.) 
adhering to the glandular prominences of the stigma; pistil 
bicarpellate, superior. Fruit typically two dry follicles (Asclepias), 
rarely becoming succulent or bladdery. Seeds numerous, com- 
pressed, imbricate, with a comose appendage. 
Druc Part Usep BoTANICAL ORIGIN Hasitat 
Asclepias Root Asclepias tuberosa United States 
Condurango, N.F. Bark Marsdenia Peru and Ecuador 
Condurango 
