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Vignapandeyana (Fabaceae), a new species from northern Western Ghats, India.

Gaikwad S, Gore R, Randive S - Biodivers Data J (2015)

Bottom Line: It is most diverse in Asia.India, with 24 species, represents a secondary center of species diversity of the subgenus.A new species, Vignapandeyana RD Gore, SP Gaikwad & SD Randive, is described from hill slopes of the northern Western Ghats of India.

View Article: PubMed Central - PubMed

Affiliation: Life Science Research Laboratory, Walchand College of Arts and Science, Solapur- 413 006, Maharashtra, India.

ABSTRACT

Background: Vigna subg. Ceratotropis (Piper) Verdc. represents a homogenous and distinct group of species with highly specialized complex floral characters. It is most diverse in Asia. India, with 24 species, represents a secondary center of species diversity of the subgenus.

New information: A new species, Vignapandeyana RD Gore, SP Gaikwad & SD Randive, is described from hill slopes of the northern Western Ghats of India. It resembles Vignayadavii Gaikwad et al. and Vignadalzelliana (Kuntze) Verdc. but differs from the latter in its dimorphic shoots (some subterranean, with cleistogamous flowers) and densely hairy pods, from the former by its curved style, flattened style beak, foveolate seed coat and absence of standard protuberance and horn-like keel pocket in cleistogamous flowers.

No MeSH data available.


Related in: MedlinePlus

Seed germination of Vignapandeyana Gore et al. (photograph by Gore RD).
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Figure 1221191: Seed germination of Vignapandeyana Gore et al. (photograph by Gore RD).

Mentions: Twining annual herbs. Stems terete, up to 2 m long, covered with 1-3 mm long, retrorse or spreading bulbous based hairs. Leaves 3-foliolate; petioles 3-5(-7) cm long, densely covered with retrorse or spreading bulbous based hairs; stipules elliptically lanceolate, medifixed, 7-9 mm long, 5-7 nerved, rounded at base, acute at apex, hairy on dorsal surface; stipels 2, linear-lanceolate, 2-3 mm long, acute or acuminate at apex, glabrous. Leaflets membranous, entire; lateral ones obliquely ovate or rhomboid to lanceolate, 2.2-5.5 x 1.5-2.3 cm, obliquely rounded at base, acute or shortly acuminate at apex, sparsely hairy; terminal leaflet ovate or rhomboid-lanceolate, 3-6.4 x 1.2-4 cm, base rounded (not oblique as in lateral leaflets), apex acute or shortly acuminate, sparsely hairy, margins entire or sometimes wavy; rachis 2-10 mm long, densely covered with whitish hairs. Flowers are of two kinds; the chasmogamous flowers present on leafy aerial shoots while cleistogamous flowers present on leafless subterranean shoots, which are close to soil surface. Chasmogamous flowers: yellow, 2-4 in axillary and terminal pseudo-racemes; peduncle 5-7.5 cm long, densely hairy with whitish-brown, 1-1.5 mm long, retrosely spreading hairs; pedicels 2-2.5 mm long, densely hairy as peduncle; bracts lanceolate, 2.5-3 x 0.8-1 mm, herbaceous, acute at apex, densely hairy; bracteoles 2, linear, 4-4.5 mm long, densely hairy. Calyx campanulate, ca 2 mm long; teeth triangular, 0.2-1.2 x 0.7-1 mm, sparsely hairy along margins. Standard petal yellow, asymmetrical, broadly ovate, 6-6.5 x 7.5-8.5 mm, emarginate at apex, central protuberance present inside (up to 0.9 mm long); claw ca 1 mm long. Right wing concealing the upper portion of the keel petals; claws 0.7-1 mm long; lamina obliquely obovate, 3.5-6.5 x 2.7-3.5 mm, notched at apex. Left wing claws 1-1.2 mm long; lamina obliquely obovate, 4-6.2 x 1.2-4 mm. Keel petals spirally incurved to left, 6-6.5 x 2.5-3.5 mm; horn-like pocket present (1.5-1.7 mm long) on the left side of keel petal. Stamens 9+1, included; staminal tube 4.5-5 mm long; free filament 8-9 mm long; anthers dorsifixed, 0.2-0.3 mm long. Pistil 1.5-1.8 cm long; ovary linear, 2.2-2.4 mm long, densely covered with long whitish hairs; style filiform, 1.2-1.3 cm long, ‘S’ shaped before stigma, beaked beyond stigma; beak 0.8-1 mm long, upwardly curved at apex. Pods ascending linear, cylindrical, 2-5 x 0.3-0.5 cm, straight or slightly curved, densely covered with brownish, 2-3 mm long spreading hairs, acute at apex. Seeds 4-10 per pod, broadly rectangular, 3-3.1 x 2-2.1 mm, brown, mottled with faint black patches, rounded or rectangular at both ends; seed coat porous with mesh-like reticulation; hilum well developed, rim-aril protruded, elliptic, 1.8-2 x 0.7-0.9 mm, whitish-brown. Germination epigeal; ecophylls petioles, simple and minutely pulvinous. Cleistogamous flowers: 2-5, whitish-yellow on leafless sub-aerial branches which produce on lower nodes of stem; pedicels 1-2 mm long; bracts lanceolate, 5-6 mm long, acute at apex, densely hairy; bracteoles 2, linear, 7-9 mm long, densely covered with 1-3 mm long bulbous based hairs. Calyx as in chasmogamous flowers. Standard petal symmetrical, broadly ovate, 4.5-5 x 5.5-6 mm, emarginate at apex, inside central protuberance absent; claws 0.3-0.5 mm long. Right wing petal slightly concealing the upper portion of the keel petal; claws 0.3-0.5 mm long; lamina obliquely ovate, 4.5-5 x 2-3 mm; auricle 0.1-0.2 mm long. Left wing petal spreading; claws 0.5-0.7 mm long; lamina ovate-elliptic, 4.9-5 x 2-2.7 mm, base oblique; auricle 0.3-0.5 mm long. Keel petals slightly curved, 4.8-5 x 1.5-2.5 mm. Stamens 9+1, dimorphic, out of 9 stamens in a bundle 4 short and 5 long; short stamens sterile with ca 1 mm long filaments, whereas long stamens fertile with ca 2 mm long filaments; staminal tube ca 1.5 mm long; free stamen sterile with ca 2 mm long filament; anthers dorsifixed 0.2-0.6 mm long. Pistil filiform, up to 6.5 mm long; ovary linear, 1.7-2 mm long, glabrescent or sparsely hairy; style filiform, 3-3.5 mm long, curved (not ‘S’ shaped), densely hairy before stigma with 0.4-0.6 mm long hairs, beaked beyond stigma; beak short, 0.3-0.5 mm long, straight, pointed at apex. Pods linear, cylindrical, straight, 2.5-4 x 0.3-0.4 cm, narrowed at both ends, sparsely hairy with short hairs (0.5 mm long), white hairs. Seeds 8-9 per pod, obliquely rounded, 3.5-4 x 3-3.5 mm, dark brown; seed coat foveolatewith mesh-like reticulation; hilum well developed, protruded, broadly elliptic, 2-2.2 x 0.4-0.7 mm, whitish. Germination epigeal; ecophylls petioles, simple and minutely pulvinous. (Figs 1, 2, 7​).


Vignapandeyana (Fabaceae), a new species from northern Western Ghats, India.

Gaikwad S, Gore R, Randive S - Biodivers Data J (2015)

Seed germination of Vignapandeyana Gore et al. (photograph by Gore RD).
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4355665&req=5

Figure 1221191: Seed germination of Vignapandeyana Gore et al. (photograph by Gore RD).
Mentions: Twining annual herbs. Stems terete, up to 2 m long, covered with 1-3 mm long, retrorse or spreading bulbous based hairs. Leaves 3-foliolate; petioles 3-5(-7) cm long, densely covered with retrorse or spreading bulbous based hairs; stipules elliptically lanceolate, medifixed, 7-9 mm long, 5-7 nerved, rounded at base, acute at apex, hairy on dorsal surface; stipels 2, linear-lanceolate, 2-3 mm long, acute or acuminate at apex, glabrous. Leaflets membranous, entire; lateral ones obliquely ovate or rhomboid to lanceolate, 2.2-5.5 x 1.5-2.3 cm, obliquely rounded at base, acute or shortly acuminate at apex, sparsely hairy; terminal leaflet ovate or rhomboid-lanceolate, 3-6.4 x 1.2-4 cm, base rounded (not oblique as in lateral leaflets), apex acute or shortly acuminate, sparsely hairy, margins entire or sometimes wavy; rachis 2-10 mm long, densely covered with whitish hairs. Flowers are of two kinds; the chasmogamous flowers present on leafy aerial shoots while cleistogamous flowers present on leafless subterranean shoots, which are close to soil surface. Chasmogamous flowers: yellow, 2-4 in axillary and terminal pseudo-racemes; peduncle 5-7.5 cm long, densely hairy with whitish-brown, 1-1.5 mm long, retrosely spreading hairs; pedicels 2-2.5 mm long, densely hairy as peduncle; bracts lanceolate, 2.5-3 x 0.8-1 mm, herbaceous, acute at apex, densely hairy; bracteoles 2, linear, 4-4.5 mm long, densely hairy. Calyx campanulate, ca 2 mm long; teeth triangular, 0.2-1.2 x 0.7-1 mm, sparsely hairy along margins. Standard petal yellow, asymmetrical, broadly ovate, 6-6.5 x 7.5-8.5 mm, emarginate at apex, central protuberance present inside (up to 0.9 mm long); claw ca 1 mm long. Right wing concealing the upper portion of the keel petals; claws 0.7-1 mm long; lamina obliquely obovate, 3.5-6.5 x 2.7-3.5 mm, notched at apex. Left wing claws 1-1.2 mm long; lamina obliquely obovate, 4-6.2 x 1.2-4 mm. Keel petals spirally incurved to left, 6-6.5 x 2.5-3.5 mm; horn-like pocket present (1.5-1.7 mm long) on the left side of keel petal. Stamens 9+1, included; staminal tube 4.5-5 mm long; free filament 8-9 mm long; anthers dorsifixed, 0.2-0.3 mm long. Pistil 1.5-1.8 cm long; ovary linear, 2.2-2.4 mm long, densely covered with long whitish hairs; style filiform, 1.2-1.3 cm long, ‘S’ shaped before stigma, beaked beyond stigma; beak 0.8-1 mm long, upwardly curved at apex. Pods ascending linear, cylindrical, 2-5 x 0.3-0.5 cm, straight or slightly curved, densely covered with brownish, 2-3 mm long spreading hairs, acute at apex. Seeds 4-10 per pod, broadly rectangular, 3-3.1 x 2-2.1 mm, brown, mottled with faint black patches, rounded or rectangular at both ends; seed coat porous with mesh-like reticulation; hilum well developed, rim-aril protruded, elliptic, 1.8-2 x 0.7-0.9 mm, whitish-brown. Germination epigeal; ecophylls petioles, simple and minutely pulvinous. Cleistogamous flowers: 2-5, whitish-yellow on leafless sub-aerial branches which produce on lower nodes of stem; pedicels 1-2 mm long; bracts lanceolate, 5-6 mm long, acute at apex, densely hairy; bracteoles 2, linear, 7-9 mm long, densely covered with 1-3 mm long bulbous based hairs. Calyx as in chasmogamous flowers. Standard petal symmetrical, broadly ovate, 4.5-5 x 5.5-6 mm, emarginate at apex, inside central protuberance absent; claws 0.3-0.5 mm long. Right wing petal slightly concealing the upper portion of the keel petal; claws 0.3-0.5 mm long; lamina obliquely ovate, 4.5-5 x 2-3 mm; auricle 0.1-0.2 mm long. Left wing petal spreading; claws 0.5-0.7 mm long; lamina ovate-elliptic, 4.9-5 x 2-2.7 mm, base oblique; auricle 0.3-0.5 mm long. Keel petals slightly curved, 4.8-5 x 1.5-2.5 mm. Stamens 9+1, dimorphic, out of 9 stamens in a bundle 4 short and 5 long; short stamens sterile with ca 1 mm long filaments, whereas long stamens fertile with ca 2 mm long filaments; staminal tube ca 1.5 mm long; free stamen sterile with ca 2 mm long filament; anthers dorsifixed 0.2-0.6 mm long. Pistil filiform, up to 6.5 mm long; ovary linear, 1.7-2 mm long, glabrescent or sparsely hairy; style filiform, 3-3.5 mm long, curved (not ‘S’ shaped), densely hairy before stigma with 0.4-0.6 mm long hairs, beaked beyond stigma; beak short, 0.3-0.5 mm long, straight, pointed at apex. Pods linear, cylindrical, straight, 2.5-4 x 0.3-0.4 cm, narrowed at both ends, sparsely hairy with short hairs (0.5 mm long), white hairs. Seeds 8-9 per pod, obliquely rounded, 3.5-4 x 3-3.5 mm, dark brown; seed coat foveolatewith mesh-like reticulation; hilum well developed, protruded, broadly elliptic, 2-2.2 x 0.4-0.7 mm, whitish. Germination epigeal; ecophylls petioles, simple and minutely pulvinous. (Figs 1, 2, 7​).

Bottom Line: It is most diverse in Asia.India, with 24 species, represents a secondary center of species diversity of the subgenus.A new species, Vignapandeyana RD Gore, SP Gaikwad & SD Randive, is described from hill slopes of the northern Western Ghats of India.

View Article: PubMed Central - PubMed

Affiliation: Life Science Research Laboratory, Walchand College of Arts and Science, Solapur- 413 006, Maharashtra, India.

ABSTRACT

Background: Vigna subg. Ceratotropis (Piper) Verdc. represents a homogenous and distinct group of species with highly specialized complex floral characters. It is most diverse in Asia. India, with 24 species, represents a secondary center of species diversity of the subgenus.

New information: A new species, Vignapandeyana RD Gore, SP Gaikwad & SD Randive, is described from hill slopes of the northern Western Ghats of India. It resembles Vignayadavii Gaikwad et al. and Vignadalzelliana (Kuntze) Verdc. but differs from the latter in its dimorphic shoots (some subterranean, with cleistogamous flowers) and densely hairy pods, from the former by its curved style, flattened style beak, foveolate seed coat and absence of standard protuberance and horn-like keel pocket in cleistogamous flowers.

No MeSH data available.


Related in: MedlinePlus