i37 
Tree (Ginkgo biloba , L). 
Permo-Carboniferous rocks in Argentina. As in the case 
of the Palaeozoic species, the leaves of this genus naturally 
suggest a comparison with Ginkgo , but we have no satis¬ 
factory evidence beyond external resemblance. 
Gomphostrobus. This genus, described by Marion 1 from 
the Permian of Lodeve and placed by him in the Salisburieae, 
bears too remote a resemblance to Ginkgo to be included in 
the list of probable near allies of the recent species. Potonie 2 
speaks of the genus as possibly a member of the Psilotaceae, 
but this opinion has little to support it. 
Dicranophyllum. A Palaeozoic genus characterized by the 
possession of narrow linear forked leaves attached to leaf 
cushions which cover the surface of the branches 3 . Such 
evidence as we possess regarding the nature of the reproduc¬ 
tive organs does not lend support to the views of some authors 
that Dicranophyllum should be included in the Ginkgoaceae. 
Trichopitys. Saporta 4 has applied this name to Permian 
and Jurassic leaves characterized by a deeply dissected lamina 
with forked acicular segments. The type-species, Trichopitys 
heteromorpha from the Permian of Lodeve, presents a fairly 
close resemblance to Dicranophyllum , but we have not suffi¬ 
cient evidence to warrant its inclusion in the Ginkgoaceae. 
A Jurassic plant, originally described by Lindley and Hutton 
as Solenites furcata 5 , is named by Saporta Trichopitys Lind¬ 
ley ana 6 ; this species should probably be referred to Baicra , 
and may be a near ally of Ginkgo. 
The genus Cordaites , although it cannot reasonably be 
t classed with the Ginkgoaceae, is of interest as affording 
certain points of contact with Ginkgo 7 which suggest a prob- 
1 Marion (’90), p. 893 ; vide also Zeiller (’92), p. 101 , PI. XV, Fig. 12 . 
3 Potonie (’93), p. 192 , Pis. XXVII, XXVIII, and XXXIII. 
3 Founded by Grand’Eury (’77), p. 1021 ; vide Lima (’ 88 ); Renault (’96), 
Pis. LXXXIX and LXXXI, p. 376 . 
4 Saporta (’84), p. 230 , PI. CLII. 
5 Lindley and Hutton (’37), PL CCIX. 
6 Saporta (’84), p. 266 , PI. CLV. 
7 Williamson (’77) and (’83) has described the double leaf-trace of Cordaites 
similar to that of Ginkgo ; vide also Scott (’96), p. 17 , who compares the stamens 
of Ginkgo and Cordaites . 
