CLASS XV III. 
Platan"thera. Corolla vaulted ; lips 
lanow, entire, spun-eJ at the base ; cells 
of the anther widely divided at the base by 
the broad interposed stigma ; poUinia pedi- 
cel! ed ; glands of the pedicels naked. 
Habkna'ria. Corolla ringent ; lip spur- 
red at the base beneath ; stripes of the pol- 
dnia with naked and distinct glands ; cells 
of the stalks adnate, or separated. 
B. Aniher pamllel with the stigma, not 
eadiicons ; masses of pollen affixed to the 
Slim mi t of the stigma, and made up of 
fannaceous or angular particles. 
Goudye'ra. Corolla ringent-like, the 
lower petals placed under the gibbous lip, 
which is divided above; style free; con- 
stituent particles of the masses of pollen an- 
gular, (rattlesnake-leaf, scrophula weed.) 
Neot'''tia. Corolla ringent, the 2 lower 
petals placed beneath the lip, which is 
beardless, interior petals converging ; style 
wingless ; pollen farinaceous. 
Liste'ra. Corolla irregular; lip 2-lobed, 
sessile, with no calli ; column apterous ; an- 
ther fixed by the base, (tway olade.) 
Crani'chis. Corolla 5-petalled, resupi- 
nate, sub-ringent lip, vaulted behind. 
C. Anther inserted, terminal, not cadu- 
cous ; masses of pollen farinaceous or 
angular. 
Pogo'nia- Petals 5, distinct, without 
glands ; lip sessile, cowled, crested inter- 
nally ; pollen farinaceous, (snake-mouth.) 
Cymbid"ium. Petals 5, distinct; lip be- 
hind, or inverted, unguiculate ; the lamina 
bearded ; style free ; pollen angular, (grass 
pink.) 
Arethu'sa. Petals 5, connate at the 
base ; lip below growing to the style, cowl- 
ed above, crested within ; pollen angular, 
(arethusa.) 
Tripho'ra. Petals 5, distant, equal and 
connivent, without glands ; lip unguiculate, 
cucuUate ; column spatulate, flattened, ap- 
terous, (three-bird-orchis.) 
Tipula'ria. Segments of the perianth 
spreading ; lip entire, sessile, with a con- 
spicuous spur at the base beneath ; column 
or style without wings, lengthened, free; 
anthers resembling a lid, permanent ; polli- 
nia (or masses of pollen) 4, parallel, (limo- 
dore.) 
Lipa'ris. Malax'^is. Corolla spreading; 
petals 5 ; lip flat, expanded, entire, turned 
various ways ; column or style winged ; 
pollinia 4, paraUel, afiixed to the summit of 
the stigma. 
Micros"tylis. Lip flat, sagittate or deep- 
ly cordate ; colunm very small, round ; pol- 
hnia 4, loose. 
Corallorhi'za. Lip produced behind, 
adnate with the spur, or free ; pollinia 4, 
oblique, not parallel (coral -root.) 
Aplec'^trum. Lip unguiculate, not pro- 
duced at. the base; anther below the sum- 
mit of the column ; pollinia 4, oblique, lens- 
like. 
Calyp"so. Segments of the perianth as- 
cending ; petals l-sided ; lip ventricose. 
, ORDER V 367 
spurred beneath, near the end , column pet 
aloid, dilated ; polMnia 4. 
Epiden"drum. Pollinia 4, parallel eacL 
mass with an ela.stic filament at the base ; 
style united wdth the claw of the lip into a 
tube, (vanilla plant.) 
ORDER II. DIANPRIA. 
Cypripe'dium. Calyx colored, 4-leaved, 
spreading ; corolla 0 (by some the calyx ia 
called a corolla) ; nectary large, hollow, in- 
flated ; style with a terminal lobe, and petal, 
like appendage on the upper side, (ladies' 
slipper.)* 
ORDER V. PENTANDRIA. 
Plants bearing seeds in follicles, and pollen 
in masses called pollinia. 
Ascle'pias. Petals 5, reflexed ; nectariea 
5, concave, erect, containing little horns : 
each stamen with a pair of pendulous mas- 
ses of pollen suspended from the top of thf» 
stigma; follicle smooth, (milk- weed, silk 
weed.)t 
Apoc"ynum. Corolla befl-form ; stamens 
with converging anthers, proceeding from 
the middle of the stigma, and alternating 
with 5 nectai'ies ; stigma thick, almost ses- 
sile ; follicles in pairs, long, linear, (dog- 
bane, Indian hemp.) 
Acera'tes. Corolla reflexed ; 5 concave, 
short nectaries ; each stamen with a pair of 
pendulous masses of pollen ; follicle smooth ; 
corolla with purple tips, much longer than 
the calyx. 
Echi'tes. Foflicles 2, distinct, terete, 
seed crowned with a pappus ; corolla fun- 
nel-shaped, with the border 5-parted ; an- 
thers adhering in the middle to the stigma ; 
scales 5, fleshy, surrounding the base of th« 
germ. S. 
Gonolo'bus. Corofla wheel form, 5-part 
ed ; nectary cylindric, fleshy, 5-lobed ; an- 
thers opening transversely, terminated by a 
membrane ; pollinia 5 pairs, not separating 
into grains ; stigma flat ; follicle 2, ventri- 
cose ; seeds comose. (false choke-dog.) 
Podostig"ma. Stigma on a stipe ; mas- 
ses of pollen 10, smooth, pendulous ; nec- 
tary 5-leaved ; leaves compressed ; corolla 
bell-form ; follicles smooth. /S. 
Periplo'ca. Calyx 5-cleft; corolla ro- 
tate, 5-parted ; orifice surrounded with an 
urceolate crown, terminating in 6 filiform 
awns ; style 1 ; stigma 5-comered ; pollinia 
solitary, composed of 4 grains ; follicles 2 
divaricate, (milk-vine.) 
Amso'nia. Follicles 2, erect; corolla fun 
nel- shaped, with the throat closed ; seeds 
terete, naked, with the summit obliquely 
truncate. 
HoY^A. Corolla 5-cleft; pollen masses 
fixed by the base, conniving, compressed . 
stigma depressed with an obtuse wart ; fol 
licles smooth ; seeds concave. Ex. 
* The ladies' slipper of the garden belongs 
to the genus Impaliens, of the class Pontan 
dria. 
t The genera, in this order are, by many bot- 
anists, 1^ laced in the class Pentundria 
