64 . BOTANICAL GAZETTE [JANUARY 
I wish to express to Dr. E. C. Jerrrey my thanks for material — 
and for advice throughout the course of this investigation, and to — 
Mr. W. P. Tuompson, Mr. A. J. Eames, and Mr. E. W. SINNOTT 
for material. 
CAMBRIDGE, MAss. 
LITERATURE CITED 
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GAZ. 4221-15. pls. I, 2. 1906. 
2. Baitey, I. W., A cretaceous Pityoxylon with marginal tracheids. Ann. 
Botany 25:315-325. pl. 26. 1911. 
3- ConweEntz, H. W., Monographie d. baltischen Bernsteinbiume. p. 53- 
4. JEFFREY, E. C., The comparative anatomy of the oer II. The 
_ Abietineae. eed. Boston Soc. Nat. Hist. 6:1-37. pls. 1 go4. 
5. DEBARY, A., Comparative anatomy of the reciaaets petiige of the 
shaidiecainin and ferns. Engl. transl. 1884. p. 4 
6. PENHALLOW, D. P., The anatomy of the North Raieican Coniferales. 
p. 88. 
7. Tuompson, W. P., Ray tracheids in Abies. Bor. Gaz. 53:331-338- Bls. : 
24, 25. 1912. 
8. Jerrrey, E. C., The comparative anatomy of the Coniferales. I. The — 
genus Sequoia. Mem. Boston Soc. Nat. Hist. 5:441-459. pls. 68-71. 1903- 
A ee ea: from the Sierra Nevada. Bor. Gaz. 38:321-332 
pls. 18, IQ. 
to. GOTHAN, W,, "has Bot. Jahresber. 31:848. 1903. 
11. GORDON, ae tech ‘Ray tracheids in Sequoia sempervirens. New Phytol. 
II:1-7. figs. 7. 
12. JEFFREY, E. C., Asiamaiie ray ee sinensis. Ann. 
Botany 22: Soa, pl. 31. 1908. 
13. BAKER, _R. T., and Surrn, H. G., A research on the pines of Australia. 
1910 
14. Mise. H., Waldungen Nordamerikas. 
15. JEFFREY, E. C., Affinities of Geinitzia gracillima. Bot. GAz. 51:21-27- 
pl. 8. 1911 
16. Hottick, ARTHUR, and JeFFrev, E. C., Studies of cretaceous coniferous — 
remains from Kreischerville, N.Y. Meni. N.Y. Bot. Garden 3:1-138 
pls. I-29. 1909. 
9. 
