Beih. Bot. Centralbl. 37: 367. 1920.

Etymology: Greek (Latinized) meso, middle, and aden, gland
Treatment appears in FNA Volume 26. Treatment on page 525. Mentioned on page 498.

Herbs, terrestrial, sympodial. Roots fasciculate, fleshy, villous. Stems erect, rhizomatous, short. Leaves several, basal, petiolate; blade not articulate, involute when immature, margins entire. Inflorescences terminal, laxly to densely flowered racemes, erect, scapose, slender. Flowers resupinate; perianth parts partially connate, apices spreading to recurved; sepals subsimilar, subparallel; dorsal sepal adherent to base of column; lateral sepals attached to column foot; petals adnate to dorsal sepal, falcate; lip auriculate, canaliculate; column arcuate, column foot present, clinandrium inflated; stigmas 2, confluent; rostellum narrow, notched; anther stalked, cordate, curved backward during anthesis, surpassing rostellum; pollinia 4, clavate, soft, mealy; viscidium ovate to subelliptic. Fruits capsules, erect, obliquely fusiform to ovoid.


Tropical and subtropical regions, North America, Mexico, West Indies, Central America, South America.


Species 7 (1 in the flora).

Selected References


... more about "Mesadenus"
James D. Ackerman +
Schlechter +
Tropical and subtropical regions +, North America +, Mexico +, West Indies +, Central America +  and South America. +
Greek (Latinized) meso, middle, and aden, gland +
Beih. Bot. Centralbl. +
Mesadenus +
Orchidaceae (tribe Cranichideae) subtribe Spiranthinae +