16 P. peramœna Gray. St. tall, leafy; lvs. lanceolate and lance-linear; bracts nearly equaling the ovary; sep. roundish-ovate; lateral petals denticulate; lip 3-parted, divisions cuneiform, dentate, middle one 2-lobed; spur filiform, clavate at end, curved, longer than the ovary. - A large and showy species in marshy grounds, Penn. to Ind. and southward. Stem slightly winged. Leaves 4 - 6' long. Fls. violet-purple, large, 20 - 50, in a terminal spike. Ovary 1', and spur l 1/4' long. June, July. (P. fissa Lindl.)

17 P. Michauxii. St. very leafy; lower lvs. elliptic-oval, acute, upper much reduced, lanceolate: spike few-flowered, loose; lip 3-parted into long linear setaceous segments; petals 2-parted, lower division linear-setaceous; spur near twice longer than the ovary. - Pine barrens, S. Car. to Fla. (Chapman) and La. (Hale). Plant 12 to 16' high. Lvs. about 3' by 1'. Spur filiform, clavellate at end, near 2' long. Fls. rather distant, white. Aug. - Oct.

18 P. repens. St. very leafy, from a creeping rhizome; lvs. all linear-lanceolate, elongated, lower bracts longer than the flowers; spike closely many-flowered; lip 3-parted into setaceous segments; petals 2-parted, lower segment setaceous; spur recurved, scarcely longer than the ovary. - Borders of ponds in pine barrens, S. Car., Ga. to La. (Hale.) Strikingly similar to the last, yet strikingly distinct, 12' to 18' high. Flowers greenish yellow, about half as large, spur about half an inch long, filiform. Lvs. 5 to 8' long, tapering to a very acute point. Aug., Sept.

19 ? P. quercicola. Root epiphytic, creeping; lvs. all cauline, lance-ovate, acute, rounded at base; petioles sheathing the stem; spike dense, few or many-flowered; fls. small, ringent, sep. and pet. ovate, obtuse; lip spatulate, free from the column, slightly recurved; spur saccate, scarcely as long as the lip, half as long as the ovary. - Chiefly growing in the rough bark of oaks, Fla. (Chapman) to La. (Hale).

Plant 3 to 10' high, with 2 to 20 flowers. Lvs. 6 to 18" long, thin, the sheath half scarious. Sep. about 1 1/2" long. - Habit quite unlike any of the foregoing species.

5. TIPULA'RIA, Nutt. (Tipula,the crane-fly; from the fancied resemblance of the flowers.) Sepals spatulate, spreading; petals lance-linear, lip sessile, 3-lobed, middle lobe linear, much the longest; spur filiform, very long; column wingless, free; anther operculate, persistent; pollinia 4, parallel. - Corms several, connected by a thick fiber. Lf. solitary. Fls. without bracts.

1 T. discolor Nutt. A slender, green-flowered plant, resembling a Corallorhiza. growing in pine woods, Vt, Mid. States to Ga. Rare northward. Lf. petiolate, ovate, plaited, smooth, and longitudinally veined 2 to 3' long. Scape 10 to 15' high, bearing a raceme of many small, greenish, nodding fls. Spur nearly twice as long as the ovary. Manuer of growth similar to that of Aplectrum. Jl.

6.CALYP'SO, Salisb. (Named for the goddess Calypso, fromOrder CXXXVIII Orchidaceae Orchids Part 4 1967 to conceal.) Sepals and petals subequal, ascending, secund; lip inflated, large, 2-pointed or spurred beneath near the end; column petaloid; pollinia 4. - Scape 1-flowered, 1-leafed, arising from a corm.

C. borealis Salisb. A beautiful and interesting plant, in cold mossy bogs, Vt, N. N. Y., Can., but very rare. Scape 6 to 8' high, bearing a single large flower at top and sheathed with several bracts. Lf. broad-ovate, smooth veined, 1 to 2' long. Fl near the size of Cypripedium, variegated with purple and yellow, the dip its most conspicuous part, bearing 2 projecting points beneath the apex. May.

7. BLE'TIA, Ruiz et Pav. (Named for Luis Blet, a Spanish botanist.) Petals and sepals distinct, nearly equal; lip sessile, cucullate by its induplicate side-lobes, spurless (in our species); column free; pollinia 8, in pairs, waxy, each pair pedicellate. - Sts. or scapes simple, arising from globular corms and bearing a raceme or head of showy fls.

1 B. aphylla Nutt. Leafless; scape tall, terete, bearing 3 to 5 short, sheathing remote bracts; raceme long, loose, with ovate, acute, spreading bractlets; fls. many, much longer than their pedicels; lip divaricately veined; spur none. - Car. to Ky., Fla. and La. A singular plant, in the borders of swamps, 15 to 30' high, the thick stem tapering above. Sheaths about half an inch long. Sep. (brownish purple) and pet. (yellowish brown) 8" long. Lip 3-lobed, with 5 broad plaits or folds. Aug., Sept

2 B. verecunda H. K. Lvs, all radical, broadly lanceolate, plaited and prominently veined; scape; scape tall, bearing a many-flowered raceme; petals con-nivent; lip with divaricate veins and folds, the side-lobes narrowed towards the apex: the middle erispate, emarginate, broader than long; spur none. - Ga. and Fla. (Pursh.). Common in the W. Indies. Scape 2 to 3f high. Fls. purple, large and showy. Jn., Jl.

8. CORALLORHI'ZA, Brown. Coral-root. (Gr.Order CXXXVIII Orchidaceae Orchids Part 4 1968 coral, Order CXXXVIII Orchidaceae Orchids Part 4 1969 root; its branched roots much resemble coral.) Sepals and petals nearly equal, converging; lip produced behind; spur short and adnate to the ovary, or none; column free; pollinia 4, oblique (not parallel), free - Plants leafless, simple, of a brown color, arising from coralline roots, sheathed with bracts and bearing a raceme.

* Spur conspicuously prominent., but adnate. Lip 3-lobed........................

No. 1

* Spur wholly obliterated. - Lip crenulate, wavy, not at all lobed................

No. 2

- Lip entire, slightly toothed near the base...........

Nos. 3, 4

1 C. multiflora Nutt. Scape many-flowered; lip cuneate-oval. spotted: 3-parted, the middle lobe recurved, lateral ones short and ear-like: spur conspicuous, adnate: caps, clliptie-obovoid, pendulous. - In woods, growing on the roots of trees. N. Eng. and Mid. States. Root coralline. Scape 10 to 15' high, leafless, brownishpurple, sheathed with a few bracts. Fls. larger than in the other species, 15 to 20, erect, spreading, in a long raceme. Lip showy, 3 to 4" long, white, sprinkled with purple spots. Spur yellowish, conspicuous, but short and adnate to the ovary. Jl.