Family Orchidaceae Subfamily Orchidoideae Tribe Diurideae
Diurideae (Endl.) Lindl., Mant. Bot., Suppl, 2 (1842) 21 (as 'Divisio V. Diurideae'). Type genus: Diuris Sm.
Synonyms:
Terrestrials, glabrous or hirsute; herbaceous; rarely subterranean. Roots present or absent. Tubers globose to elongate, free from or partially or entirely covered by a fibrous tunic. Leaves present or absent, 1 to several, cylindrical or convolute, entire or lobed; petiole present or absent. lnflorescence 1- or several-flowered, racemose, spicate or rarely a condensed capitulum . Flowers resupinate or not, dull to brightly coloured. Sepals and petals more or less similar in shape, or very different. Lip immobile, mobile or triggered on the end of an elastic strap, sometimes peltate on a rod-like stalk; blade not lobed or 3-lobed, smooth or with ridges , rows of sessile or stalked calli, large pseudoglands or trichomes, sometimes resembling an insect; nectar present or absent. Column rarely with stamen and style for a large part free from each-other; column foot present or absent; pollinarium present or absent; pollinia 2, 4, or 8. Fruit usually a dehiscent capsule, rarely an indehiscent berry.
(after Jones 2001)
Tribe Diurideae occurs in lndia and Nepal, Indochina, China, Japan, Malesia, New Guinea, Solomon Island, New Hybrides, Australia, New Zealand, Fiji, Samoa, and the Society Islands.
- Brieger in Brieger, Maatsch & Senghas (ed.), R. Schechter, Die Orchideen, 3rd ed., Band l, Teil A, 1 (1970) 340
- Dressler, Orch.: Nat. Hist. Class. (1981) l79
- Dressler, Lindleyana 1 (l986) 5-20
- Dressler, Phylog. Class. Orch. Fam. (1993) 126-139
- Jones, D.L. Tribe Diurideae. In Pridgeon, A.M., P.J. Cribb, M.W. Chase & F.N. Rasmussen (edit.), Genera Orchidacearum 2, Orchidoideae (part 1) (2001) 11.
- Szlachetko, Fragm. Flor. Geobot. Suppl. 3 (1995) 1-152.
Tribe Diurideae in New Guinea contains 9 Subtribes; in New Guinea 4 Subtribes:
Acianthinae
Cryptostylidinae
Drakaeinae
Thelymitrinae
ARTIFICIAL KEY TO THE SUBTRIBES OF THE TRIBE DIURIDEAE IN NEW GUINEA
1a Roots fleshy; tubers absent. Leaves lasting more than one season == Cryptostylidinae
1b Tubers fleshy, with or without filamentous roots. Leaves lasting one season only == 2
2a Leaves absent or reduced to bracts or scale leaves == Drakaeinae
2b Leaves present == 3
3a Leaves 2-6 per shoot, either basal around the scape or in a lateral rosette == Drakaeinae
3b Leaf 1-2 per shoot, always basal == 4
4a Leaf strap-shaped. Column at the apex with 2 brush-like appendages == Thelymitrinae
4b Leaf ovate, heart-shaped, (sub)reniform or broadly suborbicular. Column at the apex with 2 brush-like appendages == 5
5a. Flower resupinate. Lip fixed and immobile == 12 Acianthinae
5b. Flower not resupinate. Lip hinged and mobile == Drakaeinae
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