Asia: Cambodia (I); China (U) ; India (I) ; Arunachal Pradesh ; Assam; Bihar ; Madhaya Pradesh ; Manipur ; Meghalaya ; Mizoram ; Nagaland ; Tripura ; Myanmar (I) ; Nepal (I) ; Pakistan (I) ; Sri Lanka (I); Vietnam (I) ; Australasia: Papua New Guinea (N) as per ILDIS
As per efi thread:
If twiner longer than 2 m, pod longer than 30 cm it is V. unguiculata subsp. sesquipedalis (L.) Verd­court
If erect or trailing shorter than 1 m, pod pendulous, 15-30 cm long….it is V. unguiculata subsp. unguiculata (V. sinensis (L.) Hassk.)
If erect or trailing shorter than 1 m, pod erect or spreading, shorter than 15 cm, it should be V. unguiculata subsp. cylindrica (L.) Verdc. (V. catiang (Burm.f.) Walp.)
 


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VIGNA Catjang Endl. from Hooghly:

Before we label this plant as Vigna unguiculata subsp. unguiculata (L.) Walp. please read the following – 
Page 389, partly, Bengal Plants, David Prain :-
VIGNA Catjang Endl. ; F. B. I ii. 205 ; E. D. V, 116. Dolichos Catjang F. I. iii. 303.
In all the provinces, cultivated.
A suberect herb. Hind. Lobia, ransa; Beng. Barbati; Santal. Ghangra.
Page 205-206, partly, F. B. I. ii. :-
4. V. Catiang, Endl.; Miq. Flor. Ind. Bat. i. 188; annual, suberect or twining,’ stipules large attached above the base, leaflets membranous ovate-rhomboidal entire or slightly lobed, racemes few-flowered long-peduncled, pod very long many-seeded. Dolichos Catiang, Linn.; DC. Prodr. ii. 399; Roxb. Fl. Ind. 303; Wall Cat. 5549. D. sinensis, Linn.,; ; DC. loc. cit.; Roxb. Fl. Ind. iii. 302; Wall. Cat. 6550; Bot. Mag. t. 2232; W. & A. Prodr. 250. Vigna sinensis, Endl.; Hassk. PI. Jav. Rar. 386. Dolichos tranquebaricusm Jacq. Hort. Vind. iii. t. 70. D. monachalis, Brot.; DC. Prodr. loc. cit,
Native and universally cultivated in the tropical zone. – DISTRIB. Tropics of old world.
Low and sub-erect (V.Catiang) or tall and voluble ( V. sinensis), always glahrous or nearly so. Stipules 1/3-1/2 in. long, attached and persistent as in Phaseolus § Strophostylis; leaflets membranous, 3-6 in. long, acute, very variable in shape, broad or narrow ovate, or ovate-rhomboidal, with the two sides below the middle prolonged into obtuse lobes. Peduncles often exceeding the leaves, 3-6-flowered ; pedicels very short. Calyx glabrous, under 1 in ; teeth lanceolate or deltoid- cuspidate. Corolla yellow or reddish, twice the calyx. Pod in some of the cultivated forms 1 or even 2 feet long, under 1/2 in. broad, edible ; seeds 10 to 20.
SUBGEN. 2. Plectrotropis. Keel prolonged into a distinct beak, so that this group connects Vigna proper with Phaseolus.
These pictures are of BARBOTI in Bengali, a vegetable extensively used these days in mid-day meal scheme in schools as per GoI order.
A cultivated plant recorded on 15/11/12, in Hooghly


For arriving at exact name please mention the fruit length of your plant:
If twiner longer than 2 m, pod longer than 30 cm it is V. unguiculata subsp. sesquipedalis (L.) Verd­court
If erect or trailing shorter than 1 m, pod pendulous, 15-30 cm long….it is V. unguiculata subsp. unguiculata (V. sinensis (L.) Hassk.)
If erect or trailing shorter than 1 m, pod erect or spreading, shorter than 15 cm, it should be V. unguiculata subsp. cylindrica (L.) Verdc. (V. catiang (Burm.f.) Walp.)


This Vigna is more than 2 m and have pods longer than 30 cm. The one in the attached pic is 51.5 cm, excl. pedicel, clearly shows that it is V. unguiculata subsp. sesquipedalis (L.) Verd­court. as per your keys.


Yes … For this key I had taken the help of Flora of China

These three are the only species of the genus described in Bailey: Manual of Cultivated Plants, an old (1949) but very reliable book,:
V. sesquepedalis: Asparagus bean, yard-long-bean: pod 1-3 ft long, pendent, more or less inflated and flabby when green; seeds 8-12 mm long.
V. sinensis: cowpea: pod 8-12 inch long, not inflated or flabby when green, pendent; seed 6-12 mm long.
V. cylindrica: Catjang: pod 3-5 inch long, not inflated or flabby when green, erect or ascending; seed less than 6 mm long, about as broad as long.    


I didn’t read the descriptions in FoC, this morning. Instead, i spent more time to find Vigna catjang Endl. in GRIN and The Plant List. But, couldn’t find any mention of Endlicher anywhere.


This climbing herb was seen at Panipat, in cultivation..
Should this be Vigna unguiculata..?


yes, i also think so, and since climber should be subsp. sesquipedalis.


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Flora of Arunachal Pradesh 1: Cultivated climber at Miao, Arunachal Pradesh in August’10. Is it ‘Barbatti’ vegetable we eat in Kolkata ?


I think this is Vigna unguiculata subsp. sesquipedalis commonly known as “string bean” or “yard long beans”


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Flora of Panipat: Vigna sesquipedalis Arya P G College Panipat:

Vigna sesquipedalis Arya P G College Campus Panipat. Cultivated for pods by Gardeners of the College
pls validate


Sir i also saw this first time, seeds were brought by one of our gardeners from eastern UP. and i am not so much 100% confident about ID. Trying to confirm on the basis of local names also


Beautiful flower with a sinuous keel…..


 
  
References:

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