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Dendrobium dillonianum

Dendrobium dillonianum

Dendrobium dillonianum A.D.Hawkes & A.H.Heller, Lloydia 20 (1957) 119 (nom. nov.).

Synonyms:

  • Dendrobium sacculiferum J.J.Sm., Nova Guinea 14 (1929) 434, pl. 68, 82 (non J.J. Sm.).
    - Type: Lam 1422 (holo L; iso BO, also alc.).
  • Chromatotriccum sacculiferum (J.J.Sm.) M.A.Clem. & D.L.Jones, Orchadian 13 (2002) 495

Basionym: Dendrobium sacculiferum J.J.Sm.

Stems elongated, slender, branching, flexuose, 33 cm long, internodes to 1.4 cm long. Leaf sheaths ribbed-angular, verrucose. Leaves patent, twisted at the base so as to lie in one plane, oblong-ovate, 0.75-0.95 by 0.23-0.33 cm, rigid, margins especially near the apex cartilaginous-crenulate, apex acutely apiculate. Inflorescences lateral from defoliated stems, racemose, very short, 1-flowered. Floral bracts broadly ovate, 0.23 cm long, apex acuminate, verruculose. Pedicel and ovary 1.65 cm long, clavate, obtusely triangular in cross-section. Flowers c. 2 cm long. Dorsal sepal 0.9 cm by 6 mm; mentum conical, 1 cm long. Petals 0.85 cm by 4.7 mm, margins near apex slightly minutely erose. Lip extending to the apex of the column, when flattened 1.3 by 0.85 cm, apex cucullate, subtrilobulate, in the middle subulate-pectinate, with the teeth decreasing in length to the sides. Column 0.26 cm long; column-foot 1.15 cm long, at c. 1/3 below the apex with a membrane-covered cavity.
(after Smith, 1929).


Flowers (including ovary) dark red, apex of column bluish violet.

Epiphyte in low, mossy, thin-stemmed forest with Vaccinium. Altitude 1400 m.

New Guinea (endemic).

Papua (Jaya Wijaya Regency).

Cool growing epiphyte.

September.

Dendrobium dillonianum is a small-leaved member of the Calyptrochilus group with 1-flowered inflorescences. It is very similar to Dendrobium parvifolium and Dendrobium lamii.


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Dendrobium dillonianum

overview

Dendrobium dillonianum

Dendrobium dillonianum A.D.Hawkes & A.H.Heller (as Dendrobium sacculiferum J.J.Sm.), drawing J.J. Smith, based on Lam 1422

Dendrobium dillonianum

Dendrobium sacculiferum J.J.Sm. (= Dendrobium dillonianum A.D.Hawkes & A.H.Heller), detail of holotype specimen: Lam 1422 (L)

Dendrobium dillonianum

Dendrobium sacculiferum J.J.Sm. (= Dendrobium dillonianum A.D.Hawkes & A.H.Heller), holotype specimen: Lam 1422 (L)