346 OX SEEDLINGS 



fruit becomes very much hardened at maturity, and is often 

 also prickly, dehiscing loculicidally by two valves at the apex 

 or almost throughout its length or it is indehiscent. Internally 

 it is two-celled or divided into locelli twice as numerous as the 

 carpels. The seeds vary in number as the ovules, arise from 

 the inner angles of the cells, and are obovate, oblong, or orbi- 

 cular and often compressed. The testa is smooth or depressed 

 into little areolae, and sometimes though rarely it is expanded 

 into a hyaline wing. As endosperm is wanting, the embryo 

 conforms to the seed and has flat or plano-convex some- 

 what fleshy cotyledons, with a short straight radicle close to 

 the hilum. 



The seeds of Sesamothamnus are compressed or flattened 

 and winged ; in some species of Sesamum they are also some- 

 what compressed and narrowly two- winged. 



The ovary of Marty nia proboscidea consists of two carpels, 

 and is one-celled with numerous ovules superposed on two 

 parietal placentas. The fruit is somewhat baccate, but ulti- 

 mately dehiscent. The seed is obovate, compressed and rugose, 

 with the external coat very much thickened and hardened. 

 The inner coat is membranous, hugs the embryo pretty 

 closely, and is shorter, as a rule, than the testa when the 

 seed is dry, leaving an empty space at the end next the 

 hilum. The embryo is straight with obovate, three- or faintly 

 five-nerved cotyledons slightly auricled around the radicle, and 

 shallowly emarginate owing to a thickening at the chalaza. 



Seedlings. The seedlings of Martynia are glandular-hairy 

 all over and notable for their great size, particularly for 

 the length of the hypocotyl. The cotyledons of Martynia 

 fragrans are roundly oblong, broadly and shallowly emargi- 

 nate, and auricled at the base, with several ascending branch- 

 ing nerves on each side of the midrib. The first pair of leaves 

 are oblong-oval, much smaller than the cotyledons, and like 

 them densely and coarsely glandular-hairy. The cotyledons 

 of M. proboscidea are comparatively narrower than the last, 

 and oblong, deeply auricled at the base, and five-nerved. 

 They fall away rather early. The leaves are opposite and 

 densely glandular-hairy. The first pair are oblong-cordate and 

 five-nerved. The second pair are roundly cordate and five- 



