Gouania hypoglauca Standl., Publ. Field Mus. Nat. Hist., Bot. Ser. 22: 89. 1940.
Liana; young branches hollow in the center or solid, indumentum dense tomentose, ferruginous. Leaf blades 3.7—12 x 2.5—5.6 cm, ovate or elliptic, membranaceous to sub-coriaceous, adaxial surface drying dark brown or black, abaxial surface drying gray, yellow-gray or grayish yellow-green, lateral veins (2) 3 or 4 (5) pairs, at 60--75º angle to midrib, adaxial surface with abundant to scattered trichomes, often restricted to venation, glabrous with age, trichomes 0.2—0.75 mm, white, abaxial surface between venation totally covered with trichomes 0.05—0.1 mm (sometimes glabrescent with trichomes retained only at base in older leaves), trichomes on venation to 0.25 mm, all trichomes straight and appressed, all white, or red-brown on venation, base rounded or rounded then shortly decurrent to obtuse (rarely cordate to subcordate), margin crenulate to nearly entire, 1 tooth/cm, tooth glands shallowly to deeply cupular (rarely pulvinate), apex short-acuminate; stipules un-lobed or with small foot, caducous, 1—3.5 x 0.5—1.5 mm, erect, usually tightly appressed to branch, triangular, acuminate, foot, if present, 0.25—1 x 0.2—0.5 mm, curving downward, subulate; petioles 5--15 mm. Inflorescence with longest racemiform part 9--21 cm, indumentum of rachis tomentose, white or ferruginous or pilose and ferruginous, bract of cyme 1—2 mm, subulate to triangular, acuminate, cyme appearing sessile. Mature flowers appearing sessile to pedicels 0.25 (0.75) mm, hypanthium tomentose or sericeous, trichomes white or green-white, sometimes mixed with ferruginous trichomes. Sepals 0.6—1.1 mm, externally tomentose or sericeous, trichomes white or green-white, sometimes mixed with ferruginous trichomes. Petals 0.7—1.25 mm; stamens with filaments 0.5—0.75 mm, narrowly triangular or linear from triangular base, anthers 0.2—0.25 mm; disc excluding lobes 1—1.9 mm diam., villous along annulus and covering most of disc excluding, or often including, lobes, disc lobes 0.1—0.3 mm (0.5 mm) x 0.3—0.75 mm at apex, transversely rectangular, generally apically bi-lobed, 1/6—1/3 length of sepals; style pubescent. Young fruits indumentum dense to abundant, velutinous to tomentose and villous, ferruginous or white; mature mericarp out-line butterfly shaped with emarginations at apex and base, the wings attached to apex and base of fruit body as well as sides, externally drying dark brown or lighter on wings, indumentum abundant tomentose with trichomes 0.05—0.25 mm, primarily appressed, white to ferruginous, internally drying yellow-white on wings, not, or only slightly, contrasting with very light brown fruit body, fruit body 6—12 mm high, wings 9--14 mm high, distance between highest points of two wings 4—7 (10) mm, width of mericarp 10—15.3 (17) mm, 1.5--2 times height of fruit body, width of fruit body 3.5--5 mm, ¼--½ width of mericarp. Seeds 3.25—4.5 x 2.25—3.5 mm, shiny brown. Locally common in southeastern Nicaragua, wet to very wet evergreen forest; 0—200 m; fl may-jul, fr oct; Araquistain 3169, Moreno 12408; Nicaragua to Panama.