22 

 GNETUM: 



A 





<^ 



Fig. 34. 'A, Gnetum venosum. — B, G. africaimm. — C, G. montamim. 

 (From Erdtman in Bot. Notiser 1954.) 



Fig. 35. Gnetiim montanum, section through part of an acetylyzed, very 

 compressed pollen grain. To the extreme right is a spinule. The black hori- 

 zontal line (indicating 1 fx) is drawn within the lumen of the grain, x 21.000. 



EMG B. M. Afzelius. 



JUNIPERUS, ARCEUTHOS, CHAMAECYPARIS, CUPRESSUS, FITZROYA, 

 LIBOCEDRUS, WIDDRINGTONIA:— 



Megaspore membranes: Chamaecyparis laivsoniana (Fig. 36, p. 23), Cu- 

 pressus arizonica (Fig. 37, p. 23), C. whitleyana (Fig. 38, p. 24), Juniperus 

 communis (Frontispiece and Fig. 39, p. 24), J. sabina (Fig. 41, p. 25). 



Pollen grains: Arceuthos drupacea (Fig. 42 B, p. 26), Chamaecyparis pisifera 

 (Fig. 42 A), Fitzroya cupressoides (Fig. 42 G, H), Juniperus californica (Fig. 

 42 D), J. prostrata (Fig. 42 E), Libocedrus decurrens (Fig. 42 F), Widdring- 



tonia cupressoides (Fig. 42 C). 



