366 ON SEEDLINGS 



the similarity which prevails between the cotyledons and the 

 adult as well as the primary leaves. H. tenuifolia has linear 

 cotyledons slightly broader towards the apex, tapering to a 

 narrow base and bluntly carinate beneath with a prominent 

 midrib. The first six leaves are in three opposite or sub- 

 opposite pairs, followed by a large number of crowded alternate 

 leaves which are linear and narrower than the cotyledons which 

 they resemble very closely. The ultimate leaves are similar 

 but minutely and distantly toothed at the margins. The 

 cotyledons of H. dentata var. integrifolia are linear, rounded on 

 the back, with a faint indication of a midrib, 1'6-1*8 cm. long 

 and 1-1-5 mm. wide. The leaves are alternate with exception 

 of the first pair, narrowly linear, rounded on the back like the 

 cotyledons but longer, and entire, or the ultimate ones have a 

 few blunt teeth near the apex. 



Hebenstretia tenuifolia, E. Mey. 



Primary root tapering downwards and giving rise to numerous 

 slender flexuose fibres. 



Hypocotyl erect, terete, finely pubescent, soon becoming firm in 

 texture, 2-2'8 cm. long. 



Cotyledons linear, obtuse, entire, broadest towards the apex and 

 tapering gradually into a narrow, petiole-like base, glabrous, slightly 

 channelled on the upper surface, with a prominent midrib beneath 

 or somewhat carinate, 2-2'5 cm. long, and 2-2'5 mm. wide above 

 the middle. 



Stem erect, terete, or bluntly quadrangular in the lower part, 

 finely pubescent ; 1st internode 7-10 mm. long ; 2nd and succeeding 

 ones very short or hardly developed. 



Leaves simple, cauline, the lower subopposite, and the upper 

 ones crowded and alternate, exstipulate, sessile and tapering to a 

 narrow petiole-like base, glabrous, opaque, channelled above and 

 obtusely carinate beneath like the cotyledons, minutely, distantly 

 and bluntly toothed at the margins. 



Nos. 1-6. In three opposite or subopposite pairs ; the rest 

 crowded, narrower than the cotyledons, and alternate. 



Hebenstretia dentata, L., var. integrifolia. 



Primary root long, tapering, flexuose, and giving rise to numerous 

 flexuose fibres. 



