4 OX SEEDLINGS 



Hypocotyl 3-4 mm. long, 1-5 mm. thick, succulent, terete, 

 glabrous, brownish. 



Cotyledons directed to one side of the axis, shortly stalked, 

 3-4 mm. long, 2 mm. wide, obtuse lozenge-shaped or oval, rounded 

 at apex, oblique, entire, with obscure midrib, glabrous, pale green. 



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

 1-5 mm. thick; 2nd 3-4 mm. long, 1-5 mm. thick. 



Leaves. So. 1. Lamina 1-5 cm. long, 1'75 cm. wide, broadly 

 cordate, obtuse at apex, entire, palmatinerved, membranous, pub- 

 escent, bright green above, paler and glabrous below ; petiole 1-5- 

 2 cm. long, pubescent. 



No. 2. Obliquely cordate, obtuse, obscurely serrate, ciliate and 

 pubescent on both surfaces as well as the petioles. 



No. 3. Serrate, and more oblique. 



CACTE.E. 



Benth. et Hook. Gen. PL i. 845. 



Fruit and Seed. The one-celled ovary is quite inferior. 

 The exterior is smooth or more often covered with scaly 

 bracts or little tufts of bristly hairs or prickles. The pla- 

 centas are variable in number, but are usually numerous, 

 and parietal, bearing numerous horizontal and anatropous 

 ovules. The fruit is smooth or variously covered with the 

 aborted remains of adnate sepals, and baccate or pulpy when 

 mature. The placentas also form a pulpy mass in which the 

 seeds He embedded. The latter are oblong or reniform and 

 laterally compressed, or thick and rounded. The testa is crus- 

 taceous or bony, of great thickness and dark brown or black, 

 smooth, granulate or covered with small depressions as in some 

 of the Passifloreae. Endosperm is scanty, copious, or almost 

 wanting, and is generally unequally distributed especially in 

 reniform or curved seeds. The embryo varies greatly in 

 different species, being curved, hooked or straight, club- 

 shaped or cylindrical. The cotyledons are of some length, or 

 short, or the embryo may be merely emarginate, making them 

 appear as if they were connate. In other cases they are fleshy, 

 plano-convex or foliaceous. The stout radicle is conical and 



