128 DOLEROPHYLLUM, CANNOPHYLLITES, EPHEDRITES, 



veloped ovules being sometimes reduced to two or even to one only. The 

 longitudinal section (Fig. 11, A, B} 1 shows the summit of the obliquely 

 ascending axis expanded into a flat surface between the two leaves, and 

 the sessile ovules of the one leaf-axil inserted considerably higher up 

 than those of the other ; it also makes us acquainted with their structural 

 details. The nucellus is surrounded by a single integument only, which is 

 formed of a few cell-layers but becomes thicker at the apex, and shows 



FIG. n. Female flowers of Gnetopsis elliptica, Ren. A and B longitudinal sections showing the envelope which 

 incloses several ovules. C diagrammatic representation of the closed envelope. D transverse section of the same 

 showing an ovtile and the sections of the numerous hairs in the form of dots. A and B after Saporta and Marion ", 

 C and D after Renault :l . 



important complications which must be noticed again presently. The apex 

 of the nucellus encloses a broad pollen-chamber, in which are found globular 

 pollen-grains quite filled with the interior cellular body. The embryo-sac 

 is large and broad, and at its upper end are at least two archegonia ; the 

 endosperm in the sac is extremely well preserved. A vascular bundle 

 enters at the base of each ovule and splits into four branches, which were 

 seen in a transvefse section by Renault 4 running far up in the ovule and 

 lying free between the remains of the integument and those of the nucellus. 



1 Renault (2), vol. iv, t. 20, f. i. 

 4 Renault (2), vol. iv, t. 21, f. 6. 



Saporta et Marion (2). 



3 Renault (2), vol. iv. 



