456 ON SEEDLINGS 



broad way of the seed, with their edges to the axis ; radicle short, 

 subquadrangular, subacute, lying between the two lobes of the 

 cotyledon, but not incumbent on them. 



Seedling (fig. 296). 



Hypocotyl erect, terete, glabrous, 2-2-5 cm. long, light green 

 or colourless. 



Cotyledons membranous, unequal, unsymmetrical, deeply bipar- 

 tite, shortly petiolate; segments obliquely oblong, ovate, obtuse, 

 entire, glabrous, dark green, distinctly pinnatinerved ; the lateral 

 veins very long. 



Stem erect, terete, glabrous, herbaceous, ultimately woody. 



TRIBE EUC^SALPINIE^E. 

 Caesalpinia tinctoria, Domb. (fig. 297). 



Hypocotyl long, woody, striated, 5-6 cm. long, brownish. 



Cotyledons obovately rotund, subfleshy, obtuse, entire, slightly 

 auricled at the base, subsessile or very shortly petiolate, glabrous, 

 dark green, trinerved, with the principal nerves again pinnati- 

 nerved. 



Stem erect, square, herbaceous (ultimately woody) minutely 

 pubescent ; 1st internode 5-6 mm. long ; 2nd internode 7-9 mm. 



First two leaves compound, abruptly pinnate, cauline, alternate, 

 petiolate, stipulate, ending in a short point; third leaf bipin- 

 nate ; leaflets simple, opposite, oval-oblong, acute, ending in a 

 sharp point ormucro, shortly petiolulate, stipellate, glabrous, green, 

 pinnatinerved ; petioles long, terete, pubescent ; stipules and stipellae 

 straight, acute, thorn- or bristle-like. 



Tubeuf 1 figures and describes the seedling of Gleditschia tri- 

 acanthos, which somewhat resembles the above, but the cotyledons 

 are oval, 2-5 cm. long, and 1-2 cm. broad, and sessile. The first 

 leaves have ten pairs of pinnaa, which are shortly stalked, have a 

 delicate pointed apex, and are hairy. 



Poinciana Gilliesii, Hook. (fig. 298). 



Hypocotyl erect, square, with slightly winged ribs, and a few 

 short brown hairs on the upper part, 4-5 cm. long ; light subglau- 

 cous-green. 



Cotyledons broadly or obovately oblong, obtuse, entire, very 

 1 Samen, FrUchte u. Keimlinge (Berlin, 1891), p. 127. 



