MONIMIAGE^. 283 



some leaves still of the colour of petals. But, besides being smaller 

 in every direction, tbeir summit is provided wilJi two little whitish 

 glandular bodies, wliicb in colour and position recall the antliers of 

 the fertile stamens. These come next, internal to the last, but are still 

 arranged on the same spiral as the perianth-leaves : they are not nume- 

 rous, the usual number being about a dozen or fifteen. Each consists 

 of a short filament and an extrorse anther with two adnate cells, 

 each dehiscing by a longitudinal cleft.' Beyond these is prolonged 

 the connective, which ends in a little whitish glandular swelling. 

 Descending towards the interior of the receptacle we find again a 

 certain number of sterile stamens, becoming gradually shorter and 

 shorter, and reduced to coloured tongues surmounted by a little 

 whitish fleshy mass. The indefinite carpels are inserted towards 

 the bottom of the sac. Each consists of a free 1-celled ovary, sur- 

 mounted by a long slender style dilated at the stigmatiferous apex, 

 passing out of the receptacle, and finally reaching the height of 

 the anthers. In the inner angle of the ovary-cell we observe a 

 parietal placenta bearing two ascending anatropous ovules, of which 

 the one is almost directly above the other when adult ;" the micro- 

 pyle looks downwards and outwards. The fruit is multiple. The 

 receptacular sac forms an indusium, at first slightly fleshy, and 

 finally dry.^ This sac, whose superior aperture is pretty widely 

 open when ripe, contains an indefinite number of ascending achenes.'* 



' The form of the pollen is peculiar. Each finally representing a little sterile hood, capping 



grain is like a flattened rectangular cushion with the chalaza of the fertile ovule like an obturator 



rather blunt angles; the two longer sides are (fig. 308). 



thickened and obtuse, recurved towards the centre, ^ On the surftice are seen transverse scars cor- 



so as to approach each other on the middle line of responding to the outermost leaves of the flowers 



one of the faces of the cushion ; but there is arranged at regular distances on a spiral. Each 



always a broad cleft-like interval between them. scar is placed on the top of a sort of projecting 



On moistening the pollen these projections disap- cushiou. 



pear entirely J the pollen swells; its angles be- * The pericarp is membranous and slightly 



come obUterated, and the grain soon becomes a fleshy for some time, finally becoming quite dry, 



smooth sphere or ellipsoid. H. Mohl (Ann. Sc. as in the Koses. In C. Ifeviffa/iis the surface 



Nai., ser. 2, iii. 332) gives a very dilierent ac- only bears scattered hairs, and there is a very 



count of this pollen : "ovoidal, three-grooved; in slight, scarcely rugose, longitudinal projection, 



water, ellipsoidal, with three bands vertically and easily visible on the dorsal and ventral median 



longitudinally compressed." lines of the pericarp, but almost obsolete towards 



- They are at first collateral, and possess two each extremity. \n C.occUlenlali.i II00K.& Any. 



coats. It usually happens that one ovule after- the whole height of the pericarp is bordered by a 



wards rises considerably and places itself above longitudinal suherous, rugose projection, covered 



the other. The latter then increases greatly in with hairs which are here short, but, as we shall 



the chalazal region (which is superior), and cum- find, become enormous in the Atlteroxpenneie. 



presses the micropylar region of the former ovule, The rest of the surface of the pericai-p is also 



which becomes deformed and hollowed out below, sprinkled with down. 



