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Dendrobium kauldorumii

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, Orchadian 6 (1980) 223 ('kauldorumi').

Type: Reeve 311 (holo LAE; iso AMES, BISH, BO, CBG, E, K, L, NSW, UPNG).

Small to medium-sized epiphytic herbs. Pseudobulbs clavate or fusiform, up to 20 by 1.3 cm, almost covered when young by papery sheaths, 2-3-leaved at the apex, orange-yellow when dry. Leaves coriaceous, spreading, elliptic, obtuse, up to 8 by 3 cm, purplish at base. Inflorescence erect, apical or from below lowest leaf, up to 20 cm long, laxly 3-9-flowered; bracts ovate, acute, 5 mm long. Flowers spreading to pendent. Dorsal sepal oblong-lanceolate, subacute, 1.7 by 0.5 cm, with lateral margins upturned; lateral sepals spreading, obliquely oblong-lanceolate, acute, 1.8 by 0.8 cm; mentum subconical, 0.7 cm long. Petals oblanceolate, subacute, 1.7 by 0.5 cm. Lip scarcely recurved, 3-lobed towards apex, 1.9-2.1 by 2 cm; side-lobes erect-incurved, oblong, rounded in front; midlobe longer than side lobes, ovate, acute, with incurved margins; callus fleshy, bilobed at apex, over half length of lip. Column short, 2.5 mm long, with blunt apical stelidia; column foot 6-7 mm long.
(after Cribb, 1983).

It was named in honour of Mr. Kaul Dorum of Laiagam (Enga Province, Papua New Guinea) who helped Tom Reeve collect the type material.
(after Cribb, 1983).


Sepals and petals white; lip pale green with darker venation; mentum, callus, anther cap, column foot base and ovary green.

Epiphytic on Nothofagus in montane forest. Altitude 2000 m.

New Guinea.

Papua New Guinea (Simbu & Eastern Highlands Provinces).

Map: Dendrobium kauldorumii T.M.Reeve, distribution map, redrawn from P. Cribb, Kew Bull. 38 (1983) 250, map 4.

Cool growing epiphyte.

September.

  • Cribb, P.J. 1983. Kew Bull. 38: 262, pl. 12E, map 4.

The flowers of Dendrobium kauldorumii superficially resemble those of Dendrobium otaguroanum, a much more widespread species. However, in Dendrobium kauldorumii the flowers are nodding, have narrower petals and the lip is distinctly three-lobed. It also may be distinguished by its stouter purple pseudobulbs which bear elliptic, obtuse leaves and a many-flowered raceme.


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Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, flower, front view, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, plant habit, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, inflorescence, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, flower, oblique front view, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, flower, oblique front view, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, flower, oblique lateral view, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, photo John Cara, flower, lateral view, cult John Cara, from PNG.

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, inflorescence, photo Roy. Bot. Gard. Edin., based on Edinburgh cult. 681181

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, flower, photo Roy. Bot. Gard. Edin., based on Edinburgh cult. 681181

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, drawing by T.M. Reeve in Orchadian 6 (1980) 225, fig. 1

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, isotype specimen: Reeve 311 (L)

Dendrobium kauldorumii

Dendrobium kauldorumii T.M.Reeve, detail of isotype specimen: Reeve 311 (L)