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Plate XL Nat. size. 1-9, D. sylvatica ; (1) young male (2) mature 

 male inflorescences ; (3) corolla of male flower dissected to show 

 position of stamens ; (4) polygamous twig bearing upper cluster 

 of male flowers and fruit below ; (5) and (6) sections through flowers 

 from polygamous tree showing development of pistil ; (7) seed 

 showing external rumination ; (8) female inflorescences ; (9) fruit 

 from female tree. 10-15, D. attenuata ; (10) male inflorescence ; (11) 

 separate male flower ; (12) seed ; (13) mature fruit showing insigni- 

 ficant calyx ; (14) solitary female flower ; (15) leaf. 



Plate XII. D. Gardneri. Nat. size, except 2 and 10 ; (1) group 

 of hermaphrodite flowers from polygamous tree ; (2) x i section of 

 hermaphrodite flower showing pistil and stamens ; (3) male flower ; 

 (4) section of male flower ; (5) male inflorescense ; (6) male flowers 

 and fruit on same twig from polygamous tree ; (7) flower from true 

 male tree ; (8) section of male flower showing stamens ; (9) corolla of 

 male flower dissected to show position of 8 pairs of epipetalous stamens; 

 (10) ring of stamens (enlarged) to show groups of various sizes, from 

 herbarium drawing ; (11) solitary female flower ; (12) section through 

 female flower showing staminodes and pistil ; (13) corolla of female 

 flower dissected to show the position of eight epipetalous staminodes ; 

 (14) longitudinal section of seed showing equable endosperm and 

 embryo in situ. 



Plate X1IL Nat. size. 



D. Ebemiml-S. (1) Male flowers ; (2) female cymose inflorescence ; 

 (3) solitary female flowers ; (4) polygamous clusters () female (b) 

 male flowers ; (5) monoecious group (a) female (6) male flowers ; 

 (6) group of stamens showing fusion and unequal length ; (7) fruit 

 and recurved calyx ; (8) transverse section of young fruit. 



D. pruriem (9-12). (9) Male flowers and leaves ; (10) stamina! 

 whorl magnified ; (11) fruit with long hairs ; (12) seed with embryo. 



Plate XIV. Nat. size. 



D. insignis (1-5). (1) Male flowers ; (2) polygamous flowers (a) 

 female flower ; (b) same flower separated from cluster ; (3) female 

 flowers in bud ; (4) fruit with calyx ; (5) L. S. of seed with embryo 

 and showing ruminate endosperm. 



D. Moonii (6-10). (6) Young fruits ; (7) male flowers in bud ; 

 (8) fruit j with calyx; (9) seed showing transverse strise ; (10) 

 longitudinal section of seed to show embryo and ruminate endosperm. 



Plate XV. Nat. size except 4 and 5 which were taken from draw- 

 ings in the herbarium. 



D. ovalifolia (1-5). (I) Male inflorescence ; (2) female flowers, 

 fruit, and leaf ; (3) seed showing irregular strise ; (4) pistil in situ, 



