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

[KBu]

Wilkin, P., Andrianantenaina, W.P. et al. (2008). The species of Dioscorea L. (Dioscoreaceae) from Madagascar with campanulate tori, including a new species from Eastern Madagascar. Kew Bulletin 63: 583. https://doi.org/10.1007/s12225-008-9079-x

Conservation
Data Deficient (DD) (IUCN 2001). Known from three sites at present but possibly elsewhere in eastern Madagascar. It is easy to overlook, and appears to be common around Ambanizana.
Distribution
Eastern Madagascar near Ambanizana on the Masoala Peninsula and in the Parc National Ranomafana.
Ecology
Light gaps in dense, wet forest on fertile soils, 25 – 1020 m a.s.l.. Its habitats are often described as steep and rocky, where rockfalls and landslides may result in higher levels of forest disturbance.
Morphology General Habit
An elegant, slender twining vine to no more than 5 m, stems annual
Morphology General Indumentum
Indumentum absent except for a few simple, unmodified, probably caducous hairs, 0.1 – 0.3 mm long, on the stem, cataphylls, pedicel apices, torus and tepal dorsal surfaces
Morphology Leaves
Leaves alternate, blade 4.6 – 11.3 × 2.8 – 6.0 cm, ovate to narrowly ovate, broader towards stem base, chartaceous, glossy or matt green, darker above than below, margins mainly entire, base cordate to weakly auriculate and lobed (e.g. sinus 5 – 24 mm deep, wide and open to narrow and hippocrepiform, especially in vegetative stem leaves, apex 6 – 20 mm long, long-acuminate and usually abruptly differentiated from the blade, length including a (1 –) 3.5 – 6 mm long, narrowly triangular, purple forerunner tip, 3 main veins reaching apex, with a smaller, often bifid, vein to each basal lobe, secondary venation prominent lower leaf blade surface; petiole 1.9 – 4.6 cm long, terete but channelled on upper surface, pulvinii at base and apex, colour as stem but especially basal pulvinus often purple, base amplexicaule, bearing lateral nodal spines (“stipules” of Burkill (1960) to c. 3 mm long, straight to recurved, acuminate, purple
Morphology Leaves Cataphylls
Cataphylls (Hoffmann 74) to c. 10 × 8 mm, thinly chartaceous, base ovate to orbicular, apex long-acuminate; bulbils not present
Morphology Reproductive morphology Flowers
Male flowers usually solitary, sometimes in lax cymules of 2 (– 3) flowers (usually towards inflorescence base), cymules with an ovate, acuminate bract to c. 1 mm long at base; floral bracts 0.4 – 1.6 × 0.3 – 0.6 mm, ovate, acuminate, inserted at pedicel base; bracteoles as bracts or narrower, inserted 90° to bract at pedicel base or a short distance above bract, both usually present at nodes of cymules; male flowers closed in bud diurnally, possibly opening and undergoing anthesis nocturnally, externally dark purple (Wilkin M950) or open and with green, translucent tepals and darker, opaque torus, pedicel colour as axis (Poncy 1535); pedicels 3.4 – 8.5 (– 9.7) × 0.2 – 0.35(– 4) mm, very slender and linear to very narrowly obdeltoid in outline but angled when viewed with a lens, flowers held at c. 90 – 45° to axis and facing outwards Female flowers (data from Andrianantenaina 85 only) with a floral bract and bracteole at pedicel base, pedicel stout, 0.1 – 0.6 mm long, ovary/developing capsule 7 – 10 mm long, oblong to oblong-elliptic, torus 0.5 – 1.4 × 0.5 – 0.9 mm, on a short, stout floral stipe at ovary apex, tepals 0.5 – 1.4 × 0.5 – 0.9 mm, not or weakly differentiated into two whorls, spreading, later reflexed, broadly ovate to ovate or ovate-oblong, apex acute to rounded; staminodia c. 0.1 mm long, staminiform, inserted on the curved part of the torus near its base, styles erect, c. 1 mm long, fused to form a column for more than 3/4 of their length, stigmas reflexed, bifid
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers 0.2 – 0.4 × 0.1 − 0.3 mm, oblong to oblong-elliptic, dorsifixed; pistillode(s) absent or concealed by filament bases
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments 0.4 – 1.3 mm long, inserted towards torus base, filiform, free and incurved-ascending towards base, above free (Hoffmann et al-74) or contingent (Zjhra & Hutcheon 197, Schatz et al-3348) or coherent (Wilkin et al-M950), in the latter two cases forming a column, apices always free and divergent once fully developed, anthers weakly exserted from torus, held erect to ascending at first, later spreading to recurved
Morphology Reproductive morphology Flowers Tepal
Tepal whorls not differentiated, fused at base, inserted on a 0.6 – 1.1 × 0.4 – 1.2 mm torus, narrowly cup-shaped to urceolate, more frequently urceolate in open flowers, thicker and fleshier than the tepals, especially towards base, some flowers on Poncy 1535 with erect to spreading flaps of torus tissue projecting beyond mouth, flaps sometimes marginally fused and forming a small corona; tepals 6, 0.6 – 1.6 × 0.5 – 1.3 mm, ovate to narrowly ovate, acute, chartaceous, spreading, later recurved
Morphology Reproductive morphology Fruits
Capsules (possibly submature) 32 – 40 × 18 – 21 mm, oblong or rarely weakly oblong-obovate in outline, base truncate to rounded, apex obtuse or rarely bluntly acute, green when fresh, mottled brown when dry
Morphology Reproductive morphology Inflorescences
Male inflorescence axes 4.3 – 22.3 cm × 0.25 – 0.9 mm, peduncle 0.5 – 3.2 cm long, slender and delicate in appearance, flattened and angled or winged, green to purple Female inflorescence axes to c. 10 cm × 1.2 mm, with a narrow wing, peduncle 1.2 – 2.7 cm long, flowers pedicellate, pendent in bud, spreading at floral opening, patent to inflorescence rachis when receptive Inflorescences 1 per axil, simple, racemose, pendent
Morphology Stem
Stems left-twining, to just 3 mm in diam., terete, unarmed, green to purplish
Note
The species is named for the first author’s wife, Kim. The latitude and longitude and the altitude (1830 m) on the label of Andrianantenaiana 85 appear to be erroneous assuming that the locality is correct. The sterile specimen Randriamanantena & Durbin 147 (MO) from Antaninarenina near Andohahela may be Dioscorea kimiae based on its leaf morphology. It is said to have edible tubers and the vernacular name is Vorozy (see also notes under D. madecassa and D. seriflora).
Type
Madagascar, Fianarantsoa Prefecture, Parc National Ranomafana, Talatakely, 20 m before E150 trail marker, 21°15.83′S 47°25.58′E, ♂ fl. 20 Dec. 1997, Wilkin, Rafamanantsoa, Foster & Caddick M950 (holotypus TAN!; isotypi K!, P!, MO!).
Vegetative Multiplication Tubers
Tubers incompletely known (apex only collected in Wilkin et al-M950) one or more, probably one per growing season, fleshy, fusiform or cylindric with an acuminate apex, buried c. 70 cm deep in substrate and descending vertically into it, with a pale brown epidermis and white parenchyma, subtended by a crown c. 4 mm in diam. and bearing broadly ovate, pale brown scales (cataphylls?)
Vernacular
Oviala (in Masoala).

Native to:

Madagascar

Dioscorea kimiae Wilkin appears in other Kew resources:

Date Reference Identified As Barcode Type Status
s.coll [3670], Madagascar K001148432
Randriamboavonjy, T. [RTI 911], Madagascar K000664661
Rajaonah, M.T. [MT 296], Madagascar K001148468
Rajaonah, M.T. [MT 308], Madagascar K001148463
Rajaonah, M.T. [MT 309], Madagascar K001148465
Antilahimena, P. [1373], Madagascar K000501335
Rajaonah, M.T. [MT 291], Madagascar K001148464
Poncy, P. [1535], Madagascar K000523541
Randriamboavonjy, T. [RTI 911], Madagascar K001148459
Rajaonah, M.T. [MT 292], Madagascar K001148466
Rajaonah, M.T. [MT 308], Madagascar K001148462
Zjhra, M.L. [197], Madagascar K000523608
Rajaonah, M.T. [MT 298], Madagascar K001148460
Andrianantenaina, W. [AWP 82], Madagascar K001171809
Hoffmann, P. [74], Madagascar K000523604
Andrianantenaina, W. [AWP85], Madagascar K001171808
Rajaonah, M.T. [MT 296], Madagascar K001148467
Labat, J.N. [3391], Madagascar K000523542
Schatz, G.E. [3348], Madagascar K001171810
Randriamboavonjy, T. [RTI 911], Madagascar K001148458
Rajaonah, M.T. [MT 298], Madagascar K001148461

First published in Kew Bull. 63: 588 (2008 publ. 2009)

Accepted by

  • Wilkin, P., Andrianantenaina, W.P., Jeannoda, V. & Hladik, A. (2008 publ. 2009). The species of Dioscorea L. (Dioscoreaceae) from Madagascar with campanulate tori, including a new species from Eastern Madagascar Kew Bulletin 63: 583-600.

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