CLASS XVIII. ORDER XII. 63 
Listf/ra. Corolla irregular; lip 2-lobed, sessile, with no caili; column apte¬ 
rous; anther fixed by the base, (tway-blade.) 
Crani'ciiis. Corolla 5- petalled, resupinate, sub-ringent lip, vaulted behind. 
C. Anther inserted , terminal , not caducous; masses of pollen farinaceous or 
angular. 
Poco'nia. Petals 5, distinct, without glands; lip sessile,cowled, crested inter¬ 
nally ; pollen farinaceous, (snake-mouth.) 
Cy-mbid 7/ ium. Petals 5, distinct; lip behind, 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, 
cowled above, crested within; pollen angular, (arethusa.) 
Tripiio'ra. Petals 5, distant, equal and connivent, without glands; lip ungui¬ 
culate, cucullate; column spatulate, flattened, apterous, (three-bird-orchis.) 
Tipula'ria. Segments of the perianth spreading; lip entire, sessile, with a 
conspicuous spur at the base beneath; column or style without wings, length¬ 
ened, free; anthers resembling a lid, permanent; pollinia (or masses of pollen) 
4, parallel, (limodore.) 
Lipa'ris. Corolla spreading; petals 5; lip flat, expanded, entire, turned vari¬ 
ous ways • column or style winged; pollinia 4, parallel, affixed to the summit 
of the stigma. 
Micros^tylts. Lip flat, sagittate or deeply cordate; column very small, 
round ; pollinia 4, loose. 
CorallorhAza. Lip produced behind, adnate with the spur, or free ; pollinia 
4. oblique, not parallel, (coral-root.) 
ApleC'trum. Lip unguiculate, not produced at the base; anther below the 
summit of the column ; pollinia 4, oblique, lens-like. 
Calyp"so. Segments of the perianth ascending; petals 1-sided ; lip ventri- 
cose. spurred beneath near the end; column petaloid, dilated; pollinia 4. 
Epiden^drum. Pollinia 4, parallel, each mass with an elastic filament at the 
base ; style united with the claw of the lip into a tube, (vanilla plant.) 
ORDER II. DIANDRIA. 
Cypripe/dtum. Calyx coloured. 4-leaved, spreading; corolla 0 ; (by some the 
calyx is called a corolla;) nectary large, hollow, inflated ; style with a terminal 
lobe, and petal-like appendage on the upper side, (ladies’ slipper.)* 
ORDER V. PENTANDRIA. 
Plants hearing seeds in follicles, and pollen in masses called pollinia. 
Ascle / pias. Petals 5, reflexed; nectaries 5, concave, erect, containing little 
horns; each stamen with a pair of pendulous masses of pollen suspended from 
the top of the stigma; follicle smooth, (milk-weed, silk-weed.)f 
Apoc'ynum. Corolla bell-form; stamens with converging anthers, proceed¬ 
ing from the middle of the stigma, and alternating with 5 nectaries; stigma 
thick, almost sessile; 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. 
GoNoto'Bus. Corolla wheel-form, 5-parted; nectary cylindric, fleshy, 5-lobed ; 
anthers opening transversely, terminated by a membrane; pollinia 5 pairs, not 
separating into grains; stigma flat; follicle 2, ventricose; seeds comose. 
(false choke-dog.) 
Periplo'ca. Calyx 5-c ! eft; corolla rotate, 5-parted ; orifice surrounded with 
an urceolate crown, terminating in 6 filiform awns; style 1; stigma 5-cornered ; 
pollinia solitary, composed of 4 grains; follicles 2, divaricate, (milk-vine.) 
ORDER VI. HEXANDRIA. 
Aristolo'ciiia. Calyx 0; corolla superior, 1-petal ted, ligulate, inflated at the 
base; capsule 6-celled, many-seeded, (birthwort.) 
ORDER XII. POLYANDRIA. 
As"arum. Calyx sub campanulate, 3 to 4-cleft; corolla 0; anthers adnate to 
the middle of the filaments; capsule inferior, 5-celled, crowned with the calyx, 
(wild ginger.) 
* The ladies’ sljpper of the garden belongs to the genus Tmpafiens, of Hie class Pentandria. 
1 The genera in this order are, by many botanists, placed in the class Pentandria. 
