84 ORCHIDACEAE. 



rowly oblong or linear-oblanceolate, acutish, 6-8 cm. long, 1-2 cm. broad; lip 

 broadly ovate, convolute, retuse, crenulate, crested, about 8 cm. long; capsule 

 narrowly cylindric, 7-8 cm. long, about 1 cm. thick. 



Coppices, Abaco and Great Bahama : Florida ; Cuba ; Jamaica ; St. Vincent ; 

 Trinidad. Our Bahama specimens are barren ; they were determined by Mr. R. A. 

 Rolfe, of Kew. OBLONG-LEAVED VANILLA. 



3. Vanilla articulata Northrop, Mem. Torr. Club 12: 31. 1902. 



High-climbing, sometimes 10 m. long or longer, branched, subterete, the 

 stems 2 cm. in diameter or less, only the youngest shoots leaf-bearing, their 

 leaves linear-lanceolate, 2 cm. long or less. Peduncle geniculate, 3-7 cm. long, 

 bearing triangular-ovate bracts 5-7 mm. long; spike few-several-flowered; 

 ovary narrowly cylindric, about 3 cm. long; sepals and petals white or slightly 

 pink, oblanceolate, acutish or obtuse, 3-4 cm. long, about 1 cm. wide ; lip 

 broadly obovate, convolute, 3-lobed, about 3 cm. wide, the middle lobe some- 

 what crested; capsule subcylindric, 5-7 cm. long. 



Thickets and low coppices, Andros, New Providence, Eleuthera, Great Esuma, 

 Great Guana, Watling's and Crooked Islands : Florida and Cuba. LINK-VINE. 

 WORM-VINE. 



3. PELEXIA Poit.; L. C. Eich. Mem. Mus. Paris 4: 59. 1818. 



Terrestrial orchids, with thick, clustered roots, petioled basal leaves, the 

 flowers spicate at the summit of a sheathed scape. Sepals narrow, the median 

 one adnate to the petals, the lateral ones united below and prolonged into a 

 spur. Lip concave, elongated, embracing the short column. Column without 

 a foot. Rostellum subulate. Anther narrowly oblong; pollinia powdery. Cap- 

 sule ellipsoid. [Greek, from the fancied resemblance of the lip to a hatchet.] 

 About 20 species, of tropical and subtropical America. Type species: Neottia 

 adnata Willd. 



Perianth 6 mm. long ; spur short, adnate. 1- P- adnata. 



Perianth 2.5-3 cm. long; spur subulate, free. 2. P. setacea. 



1. Pelexia adnata (Sw.) Spreng. Syst. 3: 704. 1826. 



Neottia adnata Sw. Fl. Ind. Occ. 3: 1409. 1806. 

 Pelexia spiranthoides Lindl. Bot. Eeg. 12: pi. 985. 1826. 



Scape pubescent above, 2.5-4 dm. high. Basal leaves 2-5, glabrous, the 

 blades elliptic or ovate-elliptic, 5-12 cm. long, 3-nerved, acute at the apex, 

 rounded at the base, the slender, nearly erect petioles 7-14 em. long, reddish; 

 sheaths of the scape acuminate, 2-5 cm. long; spike pubescent, many-flowered, 

 6-12 cm. long; bracts narrowly lanceolate, about as long as the whitish 

 flowers; sepals about 6 mm. long, the median one elliptic, obtuse, concave, the 

 lateral ones linear, acute; petals linear, nearly as long as the sepals; lip tubular 

 below, 5-6 mm. long; capsule about 1.5 cm. long, 6-ribbed. 



In shady coppice, Andros at Conch Sound : Cuba to Guadeloupe ; Jamaica ; 

 Venezuela. Determination based on fruiting specimen only ; recorded by Mrs. 

 Northrop as Cranichis sp. SHOKT-SPUBEED PELEXIA. 



2. Pelexia setacea Lindl. Gen. & Sp. Orch. 482. 1840. 



Scape 3-6 dm. high, puberulent above, bearing several acuminate sheaths 

 2-4 cm. long. Basal leaves 1-3, the blades elliptic or oval, 8-15 cm. long, 

 acute at the apex, obtuse or rounded at the base, several-nerved, the slender 

 petioles 10-18 cm. long; spike few-several-flowered, pubescent, 15 cm. long or 

 less ; bracts ovate-lanceolate, 2-2.5 cm. long, long-acuminate into a filiform tip ; 

 ovary fusiform, about 2 cm. long; perianth purplish-green or greenish-white; 



