﻿86 Renews — Seer's Primceval World of Switzerland. 



/ Fig. 6. » , Fig. 7. ^ Fig. 8. 



-Fig. 6. 



Fig. 7. 



-Fig. 8.- 



FiG. 6. GhjptostroJms europaus^ Br. sp. ffiningen. a. Branch with a mature cone; 

 b. Wig with male flowers; c, twig with divergent leaves; d. twig with 

 adpressed leaves. — Fig. 7. Taxodium distiehum miocenum. a. From Hohe- 

 Ehonen ; b. male flowers from Bilin. — Fig. 8. Widdringtonia Helreticay 

 Heer, from Hohe-Ehonen. a. Branch; b. closed cone; c. cone open; d. 

 open cone with seeds. (Heer, Figs. 155, 156, and 158, p. 324.) 



The genus Sequoia had a wide distribution in Tertiary times from 

 Central Italy and Greece up to the Arctic zone. 



Sequoia Zangsdorfi is 

 found fossil on the Mac- 

 kenzie Eiver, in Green- 

 land, in Kamtschatka, in 

 Alaska, and also in many 

 European localities. This 

 form is closely related to 

 the redwood (Sequoia sem- 

 pervirens) which forms 

 great forests at the present 

 day in the coast-range of 

 California, throwing up 

 stems 250 feet high. The 

 Mammoth-tree {Sequoia gi- 

 gantea) is found only in the 

 higher Sierra, and is much 

 more limited in its range than the other species, and is probably 

 dying out, other and smaller Coniferee apparently far out-numbering 

 it upon its own ground.^ It attains a height of 300-320 feet, and 

 a diameter of 20-30 feet. Eemains of this genus are found in the 



1 See the admirable Address by Prof. Asa Gray to the American Association at 

 Dubuque, Iowa, in SiUiman's American Journal, 1872, 3rd series, vol. iv. p. 282. 



Fig. 9. Sequoia Langsdorji: a. cone from 

 Eixhoft ; b. longitudinal section with seed ; c. 

 transverse section ; d. seed ; e. female flowers. 

 From Greenland, 70° N. lat. (Heer, Fig. 158b, 

 p. 329.) 



