ULMACE^. 



141 



Fig. 93. Fruit. 



deep, imbricate in the bud, marcescent. Tbe androecium is com- 

 posed of an equal number of superposed stamens. They are inserted 

 at a greater or less height 



on the margin of the mmus campestns. 



receptacular cup,^ and 

 are formed each of a fila- 

 ment, erect in the bud, 

 and a bilocular anther, 

 exserted, extrorse, dor- 

 sifixed and dehiscing by 

 two longitudinal clefts.^ 

 The gynsecium, in- 

 serted in the centre of 

 the receptacle, is com- 

 posed of a sessile or sti- 

 pitate ovary, sterile in 

 the male flower, fonned 

 of two carpels, in such 

 a manner that here and 

 there it may have two 

 uniovulate cells (fig. 92); 

 it is surmounted by a 

 style which divides above 

 into two equal branches, 

 furnished within with 

 stigmatic papillse. But, 

 mosii frequently, only 

 one of the ceUs is fer- 

 tile, and the ovule which 

 it encloses, inserted near the top of the internal angle, is descending, 

 anatropous, with the. micropyle directed upwards and outwards.^ 

 The fruit is a flattened samara, the entire margin of which is pro- 

 duced to a peripheric membranous wing, ciliate or not at the edge, 

 and its cavity, somewhat unsymmetrical, with reticulate partition, 

 encloses a descending seed whose fleshy embryo is destitute of 

 albumen. Its flat cotyledons correspond to the faces of the fruit. 



Fig. 90. Floriferous branch. 



Fig. 94. Long. sect, of 

 fruit [\). 



' That is to say a little perigynoualy. 

 ' The poUen is (H. Mohl, Arm. Sec. Nat. eer. 

 iii. 2, 312) " ellipsoid flat ; five oval pores. 



surrounded by a narrow halo, situated along 

 the equator {U. campestris)." 

 ^ It has a double coat. 



