ORCHIDACEAE 363 
2. APTERIA Nutt. Perennial herbs. Flowers nodding, long-pedicelled, 
white or purple. Filaments with wing- 
like appendages: connective not pro- 
onge eyond the anther-sacs.—Three 
species, the ind pur two in tropi- 
cal Ameri 
1. A. aphylla (Nutt.) Barnhart. Stem 
Fla. to La. and Ga 
Famity 2. ORCHIDACEAE — Orcuip FAMILY 
Perennial herbs, e pn ear with tiberous or fibrous roots, 
ems or 
01 
ally al ; tals 
of 2 kinds, e 2 lel (“petals” y similar, and the middle one (“lip”) 
usually very iffer rom the other petals, sometimes prolonged below 
into a spur, often er by ‘the torsion of the e pedicel or ovary. Androe- 
cium irregular, of one or more stamens, adnate to the style, forming an 
asymmetrical column. Anther 1, or rarely 2 anthers, a 2-celled, con- 
taining 2-8 waxy or powdery pollinia; these pollen-masses usually stalked, 
united by elastic threads and often attached at the base to a viscid gland. 
Gynoeeium of 3 united carpels. vary inferior, l-celled, often twisted. 
Style commonly terminating in a beak at the base of the anther, or between 
its sacs. Stigma a viscid surface facing the lip beneath the beak or between 
the anther-saes. Fruit a 3-valved capsule. Seeds numerous, very small.— 
About 450 genera and over 5,000 species of wide geographie distribution, 
but most abundant in the tropies, where many species are epiphytes. 
Polleniferous anthers 2, borne laterally on the column: lip a large inflated sac or 
pouch, without an apical blade—DIAN E. Tribe . CYPRIPEDIEAE. 
Polleniferous anther solitary: lip simple or complex, if 
saecate bearing an apical blade, or if merely sac- 
cate and bladeless, then forming the upper mem 
—MONANDRAE. 
Anther attached by a broad base, not only per- 
sistent, but inarticulate and immobile : pollinia 
narrowed into tails which. emerge from the base. 
of the uem EE of the poche lip developed 
into a spu a:'sac at the bas Tribe II. ORCHIDEAE. 
Anther terminating the column or posterior, often 
affixed by a slender filament, often deciduous 
or coming away with the pollinia, or rarely 
remi ved 2 a DOOTI lip rarely pro- 
duc nto a spu 
Pollinia readily disintegrating, granular, mealy, 
when in masses neither hard nor 
: | . Tribe III. NEOTTIEAE. 
Pollinia waxy, aggregated in masses in which the 
pollen grains cohere. 
