LYGINODENDRON 389 



the qorrectness of the attribution. Further structural 

 evidence is not wanting, as we shall see below. 



The cupule, which in general form has been com- 

 pared to the husk of a hazel nut, was ribbed in its 

 lower part and divided into lobes above (see Figs. 144 

 and 149); it sprang from the pedicel immediately 

 below the base of the seed, around which it formed a 



Fie. 147. — Lagenostoma Lomaxi. Apex of seed in median longitudinal section through 

 micropyle. r, palisade-layer; ot, outer; /./., inner wall of canopy (integument); s, 

 space between canopy and nucellus ; fie, cavity of pollen-chamber ; e, its orifice ; 

 cc, central column of pollen-chamber ;fig, pollen-grains ; fil, part of nucellus supporting 

 pollen-chamber ; mg, membrane of megaspore. >: about 50. After Oliver. Univ. 

 College Coll. R 1. 



perfectly free envelope (see diagram, Fig. 148). The 

 pedicel was traversed by a single concentric and mesarch 

 vascular strand, which, before entering the chalaza of 

 the seed, gave off a number of bundles (probably nine or 

 ten) into the cupule ; the cupular bundles were branched, 

 and appear to have been collateral and mesarch in 

 structure. There is a detailed agreement between the 

 strands of the pedicel and cupule and those of the 



