580 PHARMACEUTICAL BOTANY 
woody, rarely through a saprophytic or parasitic connection 
becoming soft, annual and white above ground, as in Indian 
Pipe (Monotropa uniflora). Leaves alternate, simple, entire, 
exstipulate, rarely soft, delicate, herbaceous (Azaleas), usually 
leathery to wiry and evergreen, more rarely (Pterospora (Pine 
Drops), Monotropa, etc.) becoming greenish-blue, bluish-yellow, 
yellowish-white to white and correspondingly saprophytic. 
Inflorescence typically a raceme (Pyrola, Andromeda, Gaylussacia, 
Erica, Arctostaphylos Uva Urst, 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 (Mono- 
Fic. 438.—Flower of a Blueberry (Vaccinium). A, mediam lengthwise section; 
. B, external view. (Robbins.) 
tropa uniflora). Flowers regular, passing to irregular (Rhodo- 
dendron), pentamerous or tetramerous ; sepals five to four, rarely 
fewer, apo- to synsepalous, usually green, sometimes brightly 
petaloid; petals five, more rarely four, slightly to deeply syn- 
petalous, cup-shaped, as in Mountain Laurel (Kalmia) to urceolate 
(Arctostaphylos, Andromeda, etc.), yellow to white or through 
yellow-pink to scarlet to crimson to crimson-purple; stamens ten 
to eight In two circles of five to four each, becoming by absorp- 
tion of inner circle, five to four only, hypogynous, epipetalous or 
epigynous; anthers two-celled, dehiscing by apical pores, as in 
Bearberry (Arctostaphylos) or apical slits; pollen sometimes 
agglutinated into long viscous threads; pistil five- to four-, 
