128 BOTANICAL GAZETTE [FEBRUARY 
tissues, which become respectively the fleshy coat, the stony coat, and 
the papery coat. 
27. Abundant liquid is brought to the watery layer by two bundles 
which enter through a gap in the stony coat and terminate just below 
the point of separation of the integument and nucellus. 
CHARLESTON, ILL. 
LITERATURE CITED 
1. Coker, W. C., Notes on the gametophytes and embryo of Taxodium. Bor. 
GaZzETTE 36:1~27, 114-140. pls. I-II. 1903. 
, On the spores of certain Coniferae. Bor. GAZETTE 38:206-213. 
Igo4. 
3- CouLTER and CHAMBERLAIN, Morphology of Angiosperms. 1905. 
4. Fercuson, Marcaret C., Life history of Pinus. Proc. Wash. Acad. Sci. 
1904. 
5. Hirasf, S., Etudes sur la fécondation et lembryogenie du rags biloba. 
Jour. Coll. Sci. Imp. Univ. Tokyo 12: 103-149. pls. 7-9 
6. Juet, H. O., Beitrige zur Kenntniss der : Asoc ate gaan Wiss. 
Bot. 35:626-659. pls. 15-16. 1 
7. Lanp, W. J. G., A morphological see of Thuja. Bot. GAZETTE 34:249- 
259. pls. 6-8. 1902. 
8. ———,, Spermatogenesis and oogenesis in Ephedra trifurca. Bot. GAZETTE 
39:161-178. pls. I-3. 1905 
9. SewarD, A. C., and Gowan, T., The maiden hair tree (Ginkgo biloba). 
Annals of Botany 14: 109-154. "pls. 8-10. 1900. 
10. Soxotowa, C., Naissance de l’endosperme dans le sac embryonnaire de 
quelques Gymnospermes. Bull. Soc. Imp. Nat. Moscow 1890 (1891). 
p. 446. Review in Beih. Bot. Centralbl. 1891, p. 349. 
11. THomson, R. B., The megaspore-membrane of the gymnosperms. Univ. 
oronto Studies no. 4. 1905. pp. 85-146. pls. 1-4 
12. WarRMING, E., Contributions 4 |’histoire naturelle des Gunde Oversigter 
K. D. Vidensk. Selsk. Forh. 1877-79. , 
EXPLANATION OF PLATES V AND VI 
With the exception of jigs. 3, 4, 34, 35, 37, and 4o, the figures were drawn 
with the aid of an Abbé camera lucida and all were reduced one-half in repro- 
duction. 
PLATE V 
Fic. 1. Vertical section of a single ovule; April 15, 1906. 5 
Fic. 2. Habit sketch of spur shoot, showing opened fertile bud; April 25, 
1906. X 
tee 2. Nenica section of a pair of ovules; May 1, 1905. X12. 
Ties 
