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Dendrobium magistratus

Dendrobium magistratus

Dendrobium magistratus P.J.Cribb, Orchadian 6 (1981) 274.

Type: Reeve 393 (holo K; iso L, LAE).

Synonyms:

  • Durabaculum magistratus (P.J.Cribb) M.A.Clem. & D.L.Jones, Orchadian 13 (2002) 488 ('magistratum')

A medium-sized to large epiphytic herb. Stems cane-like, clustered, tapering somewhat towards apex, dilated somewhat at base, up to 60 by 1 cm, covered for most part by tubular sheaths and leaf bases, up to 15- or more leaved. Leaves distichous, coriaceous, flat, elliptic or oblong-elliptic, slightly bilobed at the rounded apex, up to 10 by 3.5 cm, each with a tubular sheathing base up to 4 cm long. Inflorescences several, spreading, to arcuate, lateral and emerging through base of leaf-sheaths or subterminal, up to 14 cm long, densely few- to many-flowered; peduncle terete, much longer than rachis, bearing three short sheaths along length; bracts narrowly triangular, acuminate, 4 mm long. Flowers subnutant, borne close together spirally on rachis. Dorsal sepal lanceolate, acute, 2.5 by 0.6 cm, with upcurved sides and a reflexed apex; lateral sepals lanceolate, acute, 2.8 by 0.7 cm, somewhat recurved at apex; mentum conical, pointing backwards, 6 mm long. Petals spreading, linear, acute, 1-3 times twisted, 3.3 by 0.2 cm. Lip 3-lobed in apical half, not recurved, 2.2 by 1.35 cm, verrucose on lateral veins; side-lobes rounded, erect, with markedly erose margins; midlobe narrowly triangular, acuminate; callus of five longitudinal low somewhat erose lamellae, the outer two being highest. Column with a rounded but erose apical margin, 3.5 mm long; foot 6 mm long.
(after Cribb, 1986).


Sepals, petals, ovary and pedicel creamy-white; lip yellow, veined with red especially on side lobes.

Epiphyte in montane forest. Altitude about 1500 m.

New Guinea, Solomon Islands.

Papua New Guinea (Western Highlands Province).

Map: Dendrobium magistratus P.J.Cribb, distribution map, redrawn from P. Cribb, Kew Bull. 41 (1986) 658, map 6.

Intermediate growing epiphyte.

  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Dendrobieae
  • Subtribe Dendrobiinae
  • Genus Dendrobium
  • Section Spatulata
  • Species Dendrobium magistratus
  • Cribb, P.J. 1986. Kew Bull. 41: 678, fig. 17, pl. 13D, map 6.
  • Lewis, B. & P.J. Cribb. 1991. Orchids of the Solomon Islands and Bougainville: 207, pl. 9D.

Dendrobium magistratus is a distinctive orchid which resembles Dendrobium crispilinguum in flower size but is easily distinguished by its more clustered flowers, different flower colour and by its lip which has a small, narrowly triangular, acuminate midlobe and broad erose side lobes.
(after Cribb, 1986).


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Dendrobium magistratus

Dendrobium magistratus P.J.Cribb, inflorescence, photo P. O'Byrne, based on O'Byrne D135

Dendrobium magistratus

Dendrobium magistratus P.J.Cribb, inflorescence, photo N.E.G. Cruttwell, based on Highland Orchid Collection, Laiagam

Dendrobium magistratus

Dendrobium magistratus P.J.Cribb, drawing by M. Church in Kew Bull. 41 (1986) 679, fig. 17

Dendrobium magistratus

Dendrobium magistratus P.J.Cribb, isotype specimen: Reeve 393 (L)

Dendrobium magistratus

Dendrobium magistratus P.J.Cribb, detail of isotype specimen: Reeve 393 (L)