494 PHARMACEUTICAL BOTANY 
OrDER ORCHIDALES 
ORCHIDACE2 OR OrcHIp Famity.—Perennial herbs of 
terrestrial or terrestrial saprophytic or epiphytic growth, having 
grotesque flowers. Roots fibrous or tuberous, often saprophytic 
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Fic. 369.—Floral organs of an orchid (Catleya sp.). A, the entire flower; sep, 
sepal; pet, petal; B, column, showing s, stigma and r, the rostellum (beak), with 
the small glands at the tip; to the glands are attached the four strap-shaped caudicles 
of the pollinia; C, pollinia, with the four caudicles; below, the gland; D, longitudinal 
section of the column; /, pollinium; E, the same, enlarged. (Gager.) 
in relation, or aerial and with velamen. Stems and branches 
upright, in epiphytic types, often forming pseudobulbs. Leaves 
alternate, entire, parallel-veined, sheathing at base, rarely 
reduced to yellowish or pale scales in saprophytes. Flowers 
irregular, usually attractive, entomophilous, but sometimes 
