Hornstedtia Retzius
Rhizome: branched, creeping
Leaf: shape: lanceolate
Petiole: present, absent
Bracts or bracteoles: 1-flowered or 2-flowered, bracteoles not tubular
Inflorescence: conical,arising from rhizomes on peduncle clothed with scalelike sheaths, spike
Calyx: tubular, apex 2-lobed or 2-toothed, apex 3-lobed or 3-toothed
Corolla: apex incurved at a right angle
Corolla lobes: 3, central lobe erect,hooded or concave, lateral lobes spreading and partly adnate to labellum
Labellum: apex lobed or cleft or concave or emarginate, equaling corolla lobes
Stamens or staminodes: lateral staminodes forming small teeth at base of labellum, lateral staminode absent or very short
Filament: short or absent
Connective: without appendage
Ovary: 3-loculed
Style: stylodes 2, stylodes >2, stylodes united, stylodes free
Stigma: funnelform
Fruit: cylindric or oblong
Seed: angled, arillate