448 ON SEEDLINGS 



4 mm. long ; stipules of first pair interpetiolar and connate, ovate, 

 acute, entire or emarginate. 



No. 3. Pinnately trifoliolate ; leaflets ovate, acute, or apiculate, 

 petiolulate, stipellate ; petiolules 2 mm. long ; stipellse small, ovate, 

 acute ; stipules triangularly ovate, acute, subauricled at the base ; 

 petiole angled, channelled above, 2 cm. long. 



Ultimate leaves pinnately trifoliolate, leaflets oblong-ovate or 

 oval, obtuse, apiculate, entire, terminal one generally somewhat the 

 largest. 



Vigna vexillata, Benth. 



Hypocotyl and cotyledons as in V. lutea. 



Stem herbaceous, terete and striate or shallowly furrowed, pube- 

 scent, erect at first, climbing above the third internode ; 1st inter- 

 node 6 cm. long ; 2nd 1'9 cm. ; 3rd 2'7 cm. ; 4th and others climb- 

 ing or rather twining from right to left. 



Leaves cauline, compound, alternate (first two simple, opposite) ; 

 petiole subterete, channelled above, pubescent; stipules short, ovate, 

 acute, subauricled at the base, pubescent. 



Nos. 1 and 2. Lanceolate, acute, entire, penninerved, pubescent 

 on both surfaces, caducous ; petiole about 2 mm. long ; stipules 

 interpetiolar, subulate, connate into one. 



No. 3 and succeeding leaves. Pinnately trifoliolate ; leaflets 

 about equal, lanceolate, acute, penninerved, pubescent on both 

 surfaces; petiole subterete, channelled above, pubescent; rachis 

 between leaflets 3'5 mm. long ; secondary stipules minute, subulate, 

 acute. 



Pachyrhizus angulatus, Rich. 



Primary root tuberous ; lower part tapering and giving off lateral 

 rootlets. 



Hypocotyl undeveloped, or subterranean. 



Cotyledons reniform, subterranean, conforming to the shape of 

 the seed. 



Stem annual, twining against the sun, terete, striate, covered with 

 an adpressed pubescence, green ; 1st internode about 3'5 cm. long ; 

 2nd when developed, 1-9 mm. ; 3rd l'5-3'5 mm., commencing to 

 twine and lengthening. 



Leaves cauline, compound, alternate (first and second frequently 

 opposite, always simple), stipulate, petiolate. 



Nos. 1 and 2. Simple, opposite or alternate ; petiole subterete, 

 channelled on the upper side, pubescent ; stipules and stipellse 



