After Theodore Daniel Vrydag Zynen, Dutch pharmacologist, a contemporary of Blume. (PO, PC).
WCM Protologue Reference:
Blume, Coll. Orchid.: 71 (1858)
Terrestrial, occasionally lithophytic or rarely epiphytic herbs. Rhizome of few to many internodes of equal length. Stem with few to many, scattered to subrosulate leaves. Leaves with a shortpetiolate base dilating into a tubular, amplexicaul sheath; lamina obliquely lanceolate to suborbicular, usually green, sometimes reddish violet, occasionally with longitudinal white-silvery striping or marmoration. Inflorescence glabrous to pubescent; peduncle abbreviated to elongate, with a few crowded to scattered sheathing bracts; rachis sometimes elongating with capsule set; floral bracts glabrous to pubescent, equal to or exceeding the length of pedicel plus ovary. Flowers resupinate, the outer surfaces of the sepals glabrous to pubescent. Dorsal sepal often thickened at apex. Lateral sepals free, often thickened apically, connivent with the labellum, similar to dorsal sepal. Petals obliquely linear-ligulate to elliptic, often short-clawed, rarely thickened apically, upper margin agglutinate to dorsal sepal, membranous. Labellum spur narrowly conical to fusiform, obtuse to subacute, entire to bilobed, containing on back wall at various depths two subsessile to pedicellate, fleshy, obovoid to globose or rarely clavate appendages; labellum lamina sessile, entire to trilobulate, often with a basal lobule on each side, sides erect to involute, apex often a minute, globular to dorsiventrally complanate lobule; keels when present two, separate to connate, glabrous to pubescent. Column subquadrate-cuneate in outline from above, oblong in lateral view; anther ovoid, biloculate; pollinia clavate to obovoid, the attenuated bases enclosed by infundibular stipes attached to an ovate-oblong viscidium; rostellum deltoid to subquadrate, remnant short-bifid or shallowly excised; stigma lobes at apical corners of column. Ovary glabrous to pubescent, twisted. Capsule not seen. (PO, PC).