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This species is accepted, and its native range is N. Sumatera.
A specimen from Kew's Herbarium

[KBu]

de Kok, R. (2008). The genus Vitex (Labiatae) in the Flora Malesiana region, excluding New Guinea. Kew Bulletin 63: 17. https://doi.org/10.1007/s12225-007-9013-7

Conservation
This is a rarely collected species (five collections known) from a small area of Northern Sumatra. Notes on some collections say that is at least locally common and it is found growing in the Gudung Leuser National Park. However this species is restricted to a small area with an increasing human pressure on its natural habitat. Given that only some populations are protected, a conservation rating of vulnerable (VUB1) is proposed (IUCN 2001).
Distribution
Indonesia: North Sumatra
Ecology
Edges of lower montane forests, at 1000 – 1500 m altitude. Flowering from December to March; fruiting from January to March.
Morphology General Habit
Shrub or small tree 3 – 8.5 m high, 12 – 13 cm DBH
Morphology Leaves
Leaves 1-foliolate, elliptic to narrowly elliptic, 4.5 – 15 × 2 – 7 cm, ratio 2 – 3, apex acuminate, base cuneate, upper side glabrous except on veins, lower side sparsely to moderately hairy, 10 – 15 secondary veins; glands few to many, yellowish
Morphology Leaves Petiole
Petiole 1.5 – 3 cm long, covered with erect hairs, round in cross-section with small swelling at apex
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments just exceeding corolla tube, 3 – 5 mm long, equal, inserted at middle to lower part of the corolla tube; anther 0.5 – 1 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx 5-lobed, two-lipped, hairs few, erect; glands many; flowering calyx upper lobes three, major lobe 1.5 – 3 × 1 – 1.5 mm, apex acute to acuminate, erect; lower lobes two, 1 – 0.8 mm long, apex acute to acuminate, erect; tube 3 – 3.5 mm long; fruiting calyx 5 – 6 mm diameter, erect
Morphology Reproductive morphology Flowers Corolla
Corolla 5-lobed, yellow, covered with glands; lip 2 – 2.2 × 1.2 – 2.5 mm, rounded to oblong, apex round, margin entire; side lobes 1 – 1.5 × c. 1.5 mm, patent, apex acute; back lobes 1 – 1.5 × 1 – 1.5 mm, erect, fused up to 30%, apex round; tube 5 – 7 mm long
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary globose, c. 1 mm, glabrous, apex covered in glands
Morphology Reproductive morphology Flowers Gynoecium Style
Style 6.5 – 7 mm long; stigma lobes 0.1 – 0.5 mm long, apex acute
Morphology Reproductive morphology Fruits
Fruits, fresh unknown; dried 4 – 6 mm diameter, globose, apex rounded, glabrous, few glands present, smooth, shiny.
Morphology Reproductive morphology Inflorescences
Inflorescence axillary, dichasia, compound, axis 0.2 – 1 cm long, round to flattened in cross-section; covered with erect hairs; bracteoles linear, 3 – 5 × 0.5 – 1 mm, falling off before fruiting
Note
This species is clearly a close morphological relative of the species in the Vitex flava group. The swelling at the apex of the petiole of each unifoliar leaf is taken here as a remnant of the apparently absent side leaflets. Therefore, following the discussion of the position of the unifoliar V. cofassus (see de Kok 2007) it is placed here in the genus Vitex.
Type
[Indonesia] Northern Sumatra, between Gadjah and Blangkedjeren, 27 Feb. 1937, van Steenis 9400 (holotype U (n.v.); isotypes BM! BO (n.v.) K! L! NY! NY!).

Native to:

Sumatera

Vitex vansteenisii Moldenke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 2004 Whitmore, T.C. [3341], Indonesia K000270942
van Steenis, C.G.G.J. [9400], Sumatera K000270069 isotype

First published in Phytologia 4: 294 (1953)

Accepted by

  • Bramley, G.L.C. (2019). Flora Malesiana 23: 1-444. Noordhoff-Kolff N.V., Djakarta.
  • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0