Monographs Details: Pelexia adnata (Sw.) Spreng.
Authority: Ackerman, James D. 1995. An orchid flora of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 73: 1-203.
Description:Distribution and Ecology - Plants caespitose, terrestrials to 70 cm tall. Roots fleshy, densely villous, 3-8 m m diam. Leaves basal, erect, 2-7; petioles reddish purple, 12-16.5 cm long; blades entire, elliptic to lanceolate, acuminate, 7.5-14 cm long, 3-5.5 cm wide. Inflorescences terminal, erect, scapose racemes, many-flowered, pubescent; floral bracts linear lanceolate, acuminate, about as long as flower or longer. Flowers resupinate. Pedicellate ovary erect-spreading, pubescent, 10-11 m m long. Dorsal sepal green, pubescent, broadly ovate to elliptic, obtuse, 5-6 m m long, 3-4 m m wide; lateral sepals pubescent, gently recurved, narrowly elliptic, obtuse, 5-6 m m long, 1.5 m m wide, adnate to the column foot, forming a spurlike mentum 6-7 m m long; mentum adnate to the ovary and only partially free near its tip. Petals green, glabrous, linear to linear-oblanceolate, obtuse, 5 m m long, forming a hood over the column with the dorsal sepal. Lip white with a yellowish throat, glabrous, constricted at or above the middle; apical half fleshy, abruptly geniculate, tip recurved, 5-6 m m long. Column to 6 mm long; column foot produced basally and decurrent along ovary, to 7 m m long; pollinia attached to an ovate viscidium. Fruits erect, ellipsoidal, 12-17 m m long.

Distribution and Ecology - General Distribution. Central America, Mexico, Venezuela, and West Indies. Distribution in Puerto Rico. Known from mountain regions of Adjuntas, Aguas Buenas, Arecibo, Bayamon, Cayey, Las Marias, Maricao, Rio Grande, San German, and Yabucoa. Habitat. Terrestrial in the understory of moist forests at low to high elevations (200-850 m); uncommon.

Discussion:1. Pelexia adnata (Swartz) Sprengel, Syst. Veg. 3: 704. 1826. Satyrium adnatum Swartz, Nov. Gen. Sp. PL Prodr. 118. 1788. Neottia adnata (Swartz) Swartz, Fl. Ind. Occid. 3: 1409. 1805. Spiranthes adnata (Swartz) Bentham, J. Linn. Soc, Bot. 18: 344. 1881. Type. Swartz s.n., from Jamaica (UPS). Phenology & Pollination. Plants bloom in the spring and produce flowers over a period of a month or more. In older plants, one may find buds, flowers, and developing and dehiscing fruits simultaneously. The flowers probably self-pollinate; nearly all flowers form fruit.