Vigna grahamiana

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Vigna grahamiana (Wight & Arn.)Verdc., Kew Bull. 24: 562 (1970) (syn: Dolichos grahamianus (Wight & Arn.)Niyomdham; Dolichos subcarnosus Wight & Arn.; Phaseolus grahamianus Wight & Arn.);
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Nigeria to Ethiopia and S. Tropical Africa, India to Thailand, Sri Lanka: Bangladesh, Burundi, Ethiopia, India, Kenya, Malawi, Mozambique, Nigeria, Rwanda, Somalia, Sri Lanka, Sudan, Tanzania, Thailand, Uganda, Zambia, Zaïre, Zimbabwe as per POWO (Wajira grahamiana (Wight & Arn.) Thulin & Lavin);
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Bangladesh (I); India (N); Karnataka; Kerala; Orissa; Tamil Nadu; Sri Lanka (N); Thailand (N) as per ILDIS;
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Common name: Graham’s Wild Pea

Twiners. Leaflets 2.5-5 x 1.5-4 cm, deltoid, apex acuminate, mucronate, base broadly ovate, appressed, pubescent; stipules 5 mm, ovate, stipels 2 mm, lanceolate. Racemes axillary; flowers blue; bracts 3 mm, ovate; calyx 2-labiate, tube 4 mm, upper lip emarginate, lower 3-lobed, lobes 2 mm; standard petal 1.2 x 1.5 cm, orbicular; wings 1.5 x 0.7 cm, obovate; keel 2.5 cm, connate, spirally coiled; staminal tube 1 cm, filaments 15 mm long; ovary 1 cm, linear, style 1.5 cm, coiled, bearded, stigma oblique. Pod 12 x 0.3 cm, linear, thickened at the margins; many seeded.
Evergreen forests
(Attributions: Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi as per India Biodiversity Portal)
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identification of a twiner from Fabaceae : 13 posts by 3 authors. Attachments (5)

Pl help me to identify the attached specimen from Fabaceae
Observed at Thirumoorthy Hills, Tamil Nadu
Moderately branched slender vine with trifoliate leaves. Petiole prominent. Central leaflet rhomboid and bigger than the lateral. Lower calyx lobe longer than the rest. Keel narrow, curved, rounded at the end in a semicircle. Pods elongated, flat and curved at the end.
Description matches with Cochlianthus gracilis. But not reported from TN.

Pl. check Dysolobium pilosum or similar species or genera.

Any lead in the matter so far ?

No Sir. I expect experts in Fabaceae to help.

Did standard have a appendage?
Were leaves pubescent or glabrous?
1. I have not observed the appendages on the standard
2. Leaves are glabrous.
Dsylobium sp. possible.
Unable to help further.

Identified as Wajira grahamiana (Wight & Arn.) Thulin & Lavin Syn. Vigna grahamiana (Wight & Arn.) Verdc.

 

 

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References: POWO (Wajira grahamiana (Wight & Arn.) Thulin & Lavin) Catalogue of Life  The Plant List Ver.1.1  ILDIS  GBIF (High resolution specimens) Flora of Zimbabwe  Flora of peninsular India  Flowers of India  India Biodiversity Portal  Kerala plants centralafricanplants