«90 Order 138.— ORCHIDACELfi. 



lip roundish-ovate, with a narrow, abrupt, recurved point ; column rounded and 

 obscurely 2-toothed at apex; spike dense, with the fls. spirally arranged, pubes- 

 cent. — Woods, Can. and U. S., with its several lvs. radical and singularly mottled 

 with white and dark green. St. 6 to 12' high. Lvs. 1 to 2' long, contracted into 

 a short, winged petiole. Spike 2 to 4' long. Perianth greenish, about 2" long, 

 nearly a3 wide. — Jn., Jl. 



16. CALQPO'GON, Brown. Grass Tink. (Gr. Kalag, beautiful, 

 TTwywi', beard ; in allusion to the bearded lip.) Sepals and petals simi- 

 lar, distinct ; lip on the upper side of the flowers (the ovary not twisted 

 as in other Orchids), unguiculate bearded ; column free, winged at the 

 summit; pollen angular. — Corm bearing a grass-like If., a naked scape 

 with several showy fls. 



C. pulcliellus Br. Lf. radical, linear-ensiform, veined ; scape few-flowered ; lip 

 erect, narrowed at base, with an expanded border and a concave, crested disk. — 

 A beautiful plant, in swamps and damp meadows, U. S. and Can. Scape slender, 

 10 to 20' high, with a long leaf (3 to 12' by £') sheathing its base. Fls. 3 to 8, 

 large, purple, remarkable for their apparently inverted position ; lip expanded at 

 apex, spatulate, crested with white, orange and purple clavato hairs, and on tho 

 upper side of tho flower, while the column is below! Jn., Jl. (Cymbidium 

 Willd.) 



17. POGCTNIA, Juss. (Gr. Truiyaw, beard; in allusion to the bearded 

 lip.) Perianth irregular, sepals and petals distinct ; lip sessile or un- 

 guiculate, cucul late, bearded inside; column wingless, elongated, 1 free ; 

 pollinia 2, farinaceous. — Habit various. Lvs. 1 or more. Fls. purple. 



§ Sepals about equal, and similar to the petals, ligbt purple. Lip scarcely lobed Nos. 1, 2 



§ Sepals much longer than, and unlike tha petals, dark brown. Lip U-lobed Nos. 3, 4 



1 P. ophioglossoides Br. lit. fibrous ; St. furnished with an oval-lanceolate leaf 

 and a foliaceous bract near tho single flower ; sep. and pet. about equal ; lip. fim- 

 briate. — An interesting plant, much taller than tho bulbous Arethusa, found in 

 swam [is and muddy shores, (Jan., N. Eng. to Car. and Ky. The stem is very 

 slender 9 — 10' high, with 2 remote leaves, the one placed about midway, 2 — 3' 

 long, lanceolate, acute, sheathing at tho base ; tho other (a bract) much smaller, 

 situated near the flower. ' Flower large, nodding, pale purple. Lip long as petals 

 and sepals (£') June. (Arethusa L.) 



2 P. verticillata Kutt. Lvs. 5, lance-oval verticillato ; fl. solitary, tho 3 outer 

 petals very long, linaar, inner ones nearly thric-e slwrkr, lanceolate, obtuse; lip 3- 

 lobed, the raiddlo lobes undulate. — Swamps, Can. to Gra. (Mr. YVm. Jones), common. 

 Stem 8 — 12' high, with a whorl of leaves near tho top and a flower 1 — 2' abovo it 

 Leaves 1.V long, -J- as wide, abruptly acuminate. The flower is remarkablo for 

 iis sepals being abovo 2' long, very narrow, and of a greenish-brown color. Lip 

 crested in tho middle. July. (Arethusa Willd.) 



3 P. pendula Liudl. Tiiree-eiuds. lit. tuberous ; si. leafy, about 4-fioive-red at 

 the top; lvs. clasping, ovate, alternate ; lis. axillary nodding; lip. entire, scabrous, 

 not bearded ; fr. pendulous. — A small, delicate plant, in swamps, Mid. and W. 

 and S. States. St. scarcely 6' high, slightly augled, with about 3 lis. which with 

 the ovary arc 1' long. The fruit often resembles 3 little birds. Lvs. 3 to G, 4 to 8" 

 long, purplish. Fls. light purple, tho segments of tho perianth equal, converging, 

 and rather longer than the lip. Aug. (Triphora Nutt.) 



4 P. clivaricata R. Br. Lvs. 2, one of them in the middle of the stem, laneoolato- 

 linear, subfalcate, the other terminal, bract-like, at tho base of tho sirujle, largo, 

 flower ; sip. narrow, wide-spread, recurved at apex, one third longer than the lan- 

 ceolal', acuminate 2^tab; lip spatulate, 3-lobed, middlo lobe rounded, cuspidate; 

 lateral lobes somewhat involute. — A line, showy plant, near 2f high, in grassy 

 swamps, V.i. to I'll, and La. Lf. 2 to -1' by 3 to b ', rather oblong than lanco- 

 ahapcil, tli" bract scarce half as large. Tetids 1' long, pink, scp. 18", brownish' 

 purpl j. Lip green, with purplo veins. Apr., May. 



13. ARETHU'SA, Grouov. (Arethusa, a nymph of Diana, trans* 



