(392 ) 
Sympetalae, not only in the form and structure of its ovule 
but also in a certain character of its embryo-sac, viz., the in- 
crease in the number of antipodals. But in most points the 
differences between the Cucurbitaceae and other sympetalous 
families are more striking than the similarities, and include 
the form and structure of the ovule, the presence of a distinct 
tapetum and the ephemeral character of the antipodals. 
BIBLIOGRAPHY 
1. Amici, G. B. Osservazioni microscopiche sopra varie piante. 
Atti Soc. Ital. Sci. 19: —. Modena, 1823. Also Ann. Sci. 
Nat. 2: 41-70, 211-248. 1824. 
2, ———-. Note sur le mode d’action du pollen sur le stigmate. 
(Extract from a letter to Mirbel.) Ann. Sci. Nat. 21: 
329-332. 1830. 
Baillon, H. Cucurbitacées. Histoire des plantes, 8: 375-. 
1886. 
& 
Balicka-Iwanowska, G. Contribution 4 V’étude du sac em- 
bryonnaire chez quelques Gamopetales. Flora, 86: 47-71. 
pl. 3-10. 1899. 
Benson, M.F. Contributions to the embryology of the Amen- 
tiferae. Trans. Linn. Soc. II. 3: 409-424. pl. 67-72. 
1894. 
Bentham, G. & Hooker, J. D. Cucurbitaceae. Genera planta- 
rum, 1: 816-841. 1867. 
Billings, F. H. Beitrage zur Kenntniss der Samenentwicke- 
ung. Flora, 88: 253-318. f. z-ro0. Igol. 
as 
wn 
a 
oo 
ie 
Brongniart, A. Mémoire sur la génération et développement 
de lembryon dans les végétaux phanérogames. nn. Sci. 
Nat. 12: 14-53, 145-172, 225-296. pl. 9g-gg. 1524. 
Caldwell, O. W. On the life history of Lemna minor. Bot. 
Gaz. 27: 37-65. f. 1-59. 1899. 
Campbell, D. H. Studies on the Araceae. Ann. Bot. 14: 
1-25. pl. 1-7. 1900. 
It. ————. Studies on the flower and embryo of Sfarganium. 
Proc. Cal. Acad. Sci. III. 1: 293-328. p2. g6-g8. 1899. 
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