ULMAGE^. 



141 



Ulmus campestris. 



Fig. 93. Fruit. 



deep, imbricate in the bud, marcescent. The 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 

 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, formed 

 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 papillae. But, 

 most frequently, only 

 one of the cells 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 {\*). 



1 That is to say a little perigynously. 

 " The pollen is (H. Mohl, Ann. Sec. Kat. ser. 

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



surrounded by a narrow halo, situated along 

 the equator iJJ. campestris)." 

 * It has a double coat. 



