Prev Genus: Genus Ceratostylis

Genus Ceratostylis section Ceratostylis

Genus Ceratostylis section Ceratostylis

Ceratostylis Blume, Bijdr. (1825) 306. Lectotype: Ceratostylis graminea Blume

Sympodial epiphytes. Rhizomes very short, creeping, not pendulous, rooting. Stems tufted, erect, not pendulous, but rarely the entire plant upside down on the underside . Pseudobulbs consisting of one internode, very slender, terete or not, resembling a petiole; 1- or rarely 2-leaved at the apex. Leaves not sheathing at the base, deciduous, duplicate, dorsoventrally flattened or (semi- or almost) terete, leathery, glabrous. Inflorescences terminal, usually very short, either with a single flower or often in clusters. Flowers small to very small, resupinate or not. Sepals spreading or not, partly connate or free; lateral sepals connate; mentum often resembling a spur. Petals usually narrower than the sepals. Lip not mobile, entire or 3-lobed, without spur; apex usually swollen. Column at the apex with two erect arms; column-foot abbreviated; pollinia 8, solid; caudicles absent; stipe absent; viscidium present.

India, tropical East Asia, Malaysia, Indonesia, the Philippines, Papua New Guinea, Pacific islands, east to Vanuatu (not in Australia). About 150 species; in New Guinea c. 75 species.

Epiphytes in lowland and montane forest, often in shady positions.

  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Podochileae
  • Subtribe Eriinae
  • Genus Ceratostylis
  • Section Ceratostylis

Genus Ceratostylis section Ceratostylis in New Guinea contains 69 species and 3 varieties:

Ceratostylis acutifolia
Ceratostylis alberteduardi
Ceratostylis albiflora
Ceratostylis alpina
Ceratostylis alticola
Ceratostylis angiensis
Ceratostylis arfakensis
Ceratostylis armeria
Ceratostylis brachyphylla
Ceratostylis breviceps
Ceratostylis breviclavata
Ceratostylis brevipes
Ceratostylia calcarata
Ceratostylia calceiformis
Ceratostylia ciliolata
Ceratostylia clavata
Ceratostylia compressicaulis
Ceratostylia culminicola
Ceratostylis curvimentum
Ceratostylis dischorensis
Ceratostylis ficinioides
Ceratostylis flavescens
Ceratostylis formicifera
Ceratostylis formicifera var. giriwoensis
Ceratostylis glabra
Ceratostylis glabriflora
Ceratostylis gracilicaulis
Ceratostylis heleocharis
Ceratostylis humilis
Ceratostylis hydrophila
Ceratostylis indifferens
Ceratostylis inflata
Ceratostylis juncoides
Ceratostylis kaniensis
Ceratostylis kerigomnensis
Ceratostylis keysseri
Ceratostylis lancipetala
Ceratostylis longicaulis
Ceratostylis longifolia
Ceratostylis longipes
Ceratostylis macra
Ceratostylis mamberamensis
Ceratostylis mayrii
Ceratostylis minutiflora
Ceratostylis muscicola
Ceratostylis nivea
Ceratostylis obscureviolacea
Ceratostylis oreophila
Ceratostylis ovatilabris
Ceratostylis parciflora
Ceratostylis phaeochlamys
Ceratostylis pinguis
Ceratostylis platychila
Ceratostylis pugioniformis
Ceratostylis recurva
Ceratostylis resiana
Ceratostylis rivularis
Ceratostylis sacculata
Ceratostylis sayeri
Ceratostylis scirpoides
Ceratostylis sessilis
Ceratostylis spathulata
Ceratostylis spathulata var. tenerrima
Ceratostylis sphaerocephala
Ceratostylis subcoerulea
Ceratostylis subcoerulea var. pulcherrima
Ceratostylis subulata
Ceratostylis tenericaulis
Ceratostylis tenuis
Ceratostylis tetrarioides
Ceratostylis triloba
Ceratostylis vonroemeri

Ceratostylis species with white or almost white flowers:

Ceratostylis albiflora J.J.Sm. P
Ceratostylis angiensis J.J.Sm. P
Ceratostylis arfakensis J.J.Sm. P
Ceratostylis brachyphylla Schltr. PNG
Ceratostylis breviclavata J.J.Sm. P Lip yellow
Ceratostylis curvimentum J.J.Sm. P Flower yellowish white
Ceratostylis dischorensis Schltr. PNG Flower pure white
Ceratostylis gracilicaulis Schltr. PNG Flower greenish white, outside white hairs
Ceratostylis heleocharis Schltr. PNG
Ceratostylis humilis J.J.Sm. P
Ceratostylis hydrophila Schltr. PNG Flower whitish, lip with golden yellow apex
Ceratostylis juncoides Schltr. PNG Flower probably white
Ceratostylis kaniensis Schltr. PNG
Ceratostylis nivea Schltr. PNG
Ceratostylis oreophila Schltr. PNG Flower light yellow
Ceratostylis ovatilabris J.J.Sm. P
Ceratostylis platychila Schltr. PNG
Ceratostylis resiana J.J.Sm. P Flower probably white
Ceratostylis scirpoides Schltr. . PNG Flower pure white, lip apex sulphur-yellow
Ceratostylis sessilis J.J.Sm. P
Ceratostylis subcoerulea P.Royen var. pulcherrima P.Royen P Fl. transparent white
Ceratostylis tenuis Schltr. . PNG

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Genus Ceratostylis section Ceratostylis

Ceratostylis acutifolia Schltr., from Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 93, fig. 344