406 ON SEEDLINGS 



larger one 1'5 cm. long, 1'35 cm. wide, with its petiole strongly 

 channelled on the upper side, and 1-15 cm. long. 



Stem herbaceous, erect, terete, striate, pubescent, purplish ; 1st 

 internode about 1-4 cm. long. 



Leaves simple, entire (at least in seedlings), cauline, opposite, 

 exstipulate, petiolate, glabrous, incurvinerved, with two strong 

 lateral nerves proceeding from near the base as hi the cotyledons, 

 tapering downwards into the petiole which is grooved above. 



First pair obovate, obtuse, entire. 



Oxybaphus ovatus, Vahl. 



Hypocotyl stout, 1-2 mm. long, glabrous, light green, ultimately 

 tuberous and fleshy. 



Cotyledons oblate or reniforrn, unequal, with the larger one 

 unsymmetrical, obtuse, entire, cordate at the base, petiolate, with 

 long thick petioles, hispid, dull green, distinctly pinnatinerved. 



Stem erect, terete, pubescent ; 1st internode 2-3 mm. long. 



First leaves alternate or nearly opposite, lanceolate, subacute, 

 pubescent, reddish-green ; midrib alone apparent. 



Oxybaphus viscosus, L'Herit. 



Hypocotyl erect, terete, finely pubescent, reddish,. 7-10 mm. 

 long. 



Cotyledons very similar to those of O. ovatus, thickly pubescent, 

 greenish above, crimson beneath. 



The larger cotyledon is cordate at the base, the smaller one 

 only very slightly so, or not at all. 



Oxybaphus elegans, Chois. 



Hypocotyl as in 0. ovatus, 3-5 mm. long. 



Cotyledons very similar to those of 0. ovatus, very unequal, 

 glabrous, light green, trinerved ; petiole flat. 



Stem erect, quadangular, herbaceous ; 1st internode 1'5-1'S cm. 

 long ; 2nd 1-2-5 cm. 



First leaves opposite, decussate. 



First pair lanceolate. 



Second and succeeding pairs ovate-oblong, obtuse, fleshy, with 

 broad, flat petioles, glabrous, light green above, reddish beneath, 

 distinctly alternately nerved. 



Abronia arenaria, Menz. (fig. 602, A). 



Acliene enclosed in and adhering to the ellipsoid, five-angled, 

 persistent base of the perianth. 



