457 
Seedling Structure of Gymnosperms. Ill ’. 
20. The following table shows the variation in the number of bundles in 
the base of the cotyledons of the plants named, and also the relation between 
the number of poles in the root-structure and the cotyledonary strands. 
This table is based on observations recorded in the literature on the 
subject, together with our own. 
No. of bundles at base 
of each cot. 
C. 1. 
C. 2. 
C. 3. 
1 
1 
1 
1 
1 
1 
1 
1 
1 
5 
4 
4 
4 
4 
4 
3 
2 
4 or 5 
1 
+ 2 
or 3 
2 
4 
V 
4 
4 
4 
4 
5 
4 
5 
4 
5 
5 
6 
6 
4 
4 
4 
3 
3 
5 or 6 
! 
4 
4 
3 
8 
3 
3 
3 
3 
4 
6 
3 
3 
4 
4 
8 
4 
4 
2 
2 
2 
Plant. 
Ginkgo biloba . . , 
Macrozamia spiralis 
Stangeria paradoxa . 
Dioon edule 
Encephalartos Altensteinii 
Encephalartos Barteri. . 
•Cycas revoluta .... 
Cycas siamensis 
Cycas Rumphii 
Ceratozamia mexicana . . . . -j 
Ceratozamia longifolia x C. \ 
mexicana ( 
Microcycas calocoma 
Bowenia spectabilis 
Zamia furfuracea j 
Root. 
3 
2 - 
2->3 
4-arch 
-*2-arch 
2 -arch. 
3 -arch 
2 -arch 
2 - arch 
3- arch 
3-arch 
-+2-arch 
-►3 -arch 
4— >-2 -arch 
3 - arch 
4- arch 
6- arch 
4-arch 
3— ►4- arch 
3-M-*- 5-arch 
4-arch 
5“* 3-arch 
3 or 4-arch 
4-arch 
2 arch 
2 -arch 
2 - arch 
3 or 4-arch 
3- arch 
4- arch 
2— ► 3-arch 
3 or 4-arch 
3- arch 
-arch or 4— ► 3-arch 
2— >>3— ► 5 -arch 
4- arch 
EXPLANATION OF PLATE XXX. 
Illustrating Mr. T. G. Hill’s and Miss de Frame’s paper on the Seedling Structure of 
Gymnosperms. III. 
All the figures are natural size. 
Fig. 1. A seedling of Ginkgo biloba. 
Fig. 2. An older example showing a greater development of the plumule. 
Fig. 3. A tricotyledonous specimen of Ginkgo. 
I i 2 
