OrchideenJournal

Publisher: V.D.O.F. Vol. 4 · 1 Vereinigung Deutscher Orchideenfreunde e.V. 2016

Dendrobium vocongii Schettler & Pham

Contents: O A new species of Blume from Page 1 – 5 ISSN-Internet 2195-772X 8.4.2016 OrchideenJournal Internet | Vol. 4 · 1

A new species of Dendrobium Blume from Vietnam page 3

Roland Schettler & Pham Duc Minh

Summary: A new species of the genus Dendrobium Vietnam is described as Dendrobium congii.

Keywords: Vietnam, Dendrobium congii.

Published by: VDOF e.V. Mittelcarthausen 2 58553 Halver Germany email: [email protected]

Editor in chief: Roland Schettler

Date of Publication: 08.04.2016, 21:00 Uhr MESZ

2 Internet | Vol. 4 · 1 OrchideenJournal A new species of Dendrobium Blume from Vietnam Roland Schettler and Pham Duc Minh

Abstract: A new species of Dendro- Lam Dong, 35 Tran Hung Dao, District rizontal striping. The base of the label- bium has been discovered in a col- 10, Da Lat, Vietnam lum varies from pure white to yellow. lection from Kon Ka Kinh, Vietnam. Dorsal sepal: lanceolate, 2 x 0.8 cm. Its habit was similar to Dendrobium description: apex mucronate. Petals: obovate to fuerstenbergianum, however upon Growth habit: plant upright, sympo- aristate, 2.5 x 1.7 cm, apex rounded blooming those proved to be dial, epiphytic, occasionally lithophy- to cuspidate. Lateral sepals: atta- a very different species, related to tic, roots 1 – 1.8 mm diameter. Pseudo- ched to the column base, in front par- Dendrobium wattii Rchb.f. We there- bulbs: clustered, fusiform to ovate, to tially fused for 8 mm, 2 x 1.8 cm; men- fore decided to describe Dendrobi- 15 cm long by 1.3 cm in diameter, be- tum shape conical to slightly quadran- um vocongii sp.nov. Schettler & aring 3 – 7 leaves that last for several gulare. Labellum three lobed, lateral Pham as a new species. The name years. Leaves: obovate to lanceolate, lobes obovate, 3 cm long from lip base honors its discovered, Mr. Vo Van from 3 to 6 cm long, 1.2 – 1.8 cm wide, to apex, 0.8 cm wide, apex rounded; Cong of Kontum. coriaceous, apex slightly bilobed, she- midlobe decurved, shape: transverse- ats covered with dark brown hairs. In- ly rectangular, 2.8 x 1 cm, apex deeply Dendrobium vocongii sp.nov. fl orescences: appear both on the old emarginate, margin coarsely dentate; Schettler & Pham and the emerging new growth, very median part of the lip with two callus short peduncle of 5 mm – 1 cm, bearing ridges extending from the base to the Type: Cultivated in Kontum by Mr. 1 – 4 fl owers. Flower 3 to 5 cm diame- base of the midlobe, with a shorter, Vo Van Cong, original collector, and ter. Flower colour: white with the ex- raised lamella between them towards bloomed in March 2016 at his nursery. ception of light orange veins on the la- the apex. Holotype: Pham 3/2016 VNP16301, In- teral lobes and callus ridges of the la- Comparison: This species bears a pas- stitute for Tropical plant improvement, bellum. The lateral parts of the label- sing resemblance with Dendrobium Trung tam ung khao hoc va cong ngh lum have a distinctive faint orange ho- wattii, which has an orange lip throat

Dendrobium vocongii Schettler & Pham

3 OrchideenJournal Internet | Vol. 4 · 1 and obvious callii. The midlobe of the lip is much longer than wide in that Dendrobium vocongii species. Dendrobium infundibulum is Epicrianthes davidiiSchettler & Pham similar as well, but the midlobe of the lip is much wider than the side-lobes. D. virgineum from Burma, and Vietnam is a close relative, but it dif- fers mainly in having only two low cal- lus ridges, having white fl owers with faint red markings, and a different lip shape. Dendrobium infundibulum and virgineum vegetative growth is as well several times bigger.

Etymology: Named after Mr. Vo Van Cong of Kontum, discoverer of the present species in the wild.

Habitat: Kon Ka Kinh, Vietnam, at an altitude of about 1,000 m. It grows on epiphytic fern roots.

Roland Schettler Mittelcarthausen 2 D - 58553 Halver

Pham Duc Minh 262 Nguyen Huy Tuong street, Thanh Xuan district Hanoi, Vietnam

Dendrobium vocongii Schettler & Pham

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Dendrobium vocongii Schettler & Pham

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