Epiblastus mutabilis
Epiblastus mutabilis Ormerod, Checkl. Papuasian Orch. (2017) 280, 490 (fig.).
Type: Brass 12881 (holo AMES).
Synonyms:
Epiphytes. Rhizome and roots not seen. Pseudobulb subcylindric, slightly compressed, 1-leaved, 2-9 by up to 1.4 cm; base enclosed by 10-12 ovate-triangular to lanceolate-triangular, acute scales, the longest to c. 11.5 cm long. Leaves ligulate, coriaceous, 36.7-53.0 by 3.4-4.3 cm; apex subacute. Inflorescences terminal, numerous, fasciculate; peduncles c. 2 cm long. Pedicel and ovary subcylindric, c. 1.5 cm long. Median sepal ovate to ovate-oblong, 0.72-0.78 by 0.48-0.49 cm; apex acute to obtuse; 3--5-nerved. Lateral sepals ovate to ovate-triangular; apex subacute; 5-nerved, 0.88-1 by 0.85-0.9 cm; mentum conical, c. 0.4 cm long, with obtuse apex. Petals oblong; apex subacute to obtuse; 3-nerved, 0.7-0.77 by 0.275-0.295 cm. Lip 3-lobed, symmetrically to asymmetrically subrhombic, 0.9-0.92 by 0.48-0.532 cm; hypochile cuneate-obovate, 0.52-0.57 by 0.48-0.52 cm, median basal half adnate to the column foot for 0.21-0.29 cm, with short, rounded lateral lobes; epichile ovate to ovate-lanceolate, 0.32-0.38 by 0.22-0.32 cm, the callus either V-shaped and acute, or transversely oblong and emarginate, with acute apex, 3-nerved. Column semiterete, 0.3-0.32 cm long; column foot 0.38-0.4 cm long.
(AfterOrmerod, 2017)
Flowers entirely dark pink, or orange-red with black anther.
Not recorded. Altitude 1200-1500 m.
Malesia (New Guinea, endemic).
Indonesia (Papua Prov., Central Mamberamo and Pegunungan Bintang Regencies. See map
Intermediate growing epiphyte.
February, July.
- Family Orchidaceae
- Subfamily Epidendroideae
- Tribe Podochileae
- Subtribe Eriinae
- Genus Epiblastus
- Species Epiblastus mutabilis
- Smith, J.J., Nova Guinea 8, 1 (1909) 45, t. 16, fig. 51
Additional collection: Indonesia. Papua Prov., Star Mts., Mt. Antares, 1 km E of junction of Bon and Minam Rivers, 1500 m, 2 July 1959, Kalkman 1356 (A). -4.89 140.905
Epiblastus mutabilis is similar to E. kerigomnensis, but differs in the apices of the callus which meet to form a broad V, and are not interposed by a thin median keel (versus apices of the callus separate).
In flowers in which the callus is emarginate and therefore similar to E. unguiculatus, the callus does not reach the lateral lobes.
Epiblastus mutabilis is named-for the two types of callus found in the type specimen (Iatin: mutabilis, changeable).
M.J. Eriks (mss.) intended to name this taxon ''E. major " in her unfinished revision of Epiblastus.
The type of that name was to be NGF 38997 (Ridsdale) (LAE; iso K) from Karkar Island, PNG.
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Epiblastus mutabilis
Epiblastus mutabilis Ormerod, drawing by Paul Ormerod, in Checkl. Papuasian Orch. (2017) 280, 490 (fig.).