certain Monocotyledonous Leaves. 351 
‘ laminae 5 depends primarily upon the protean forms which invagination 
is capable of assuming (pp. 349-50). It is concluded that the wide dis- 
tribution among Monocotyledons of ‘ blade * formation by invagination of 
the distal region of the petiole or sheath, confirms the view that the leaf 
‘ blades * of this class are pseudo-laminae. 
Balfour Laboratory, 
Cambridge. 
List of Memoirs cited. 
Arber, A. (1918) : The Phyllode Theory of the Monocotyledonous Leaf, with Special Reference to 
Anatomical Evidence. Ann. Bot., vol. xxxii, 1918, pp. 465-501, thirty-two text-figures. 
(191 9 1 ) : The Vegetative Morphology of Pistia and the Lemnaceae. Proc. Roy. Soc., 
B., yol. xci, 1919, pp. 96-103, eight text-figures. 
(1919 2 ) : Studies on Intrafascicular Cambium in Monocotyledons (III and IV). Ann. 
Bot., vol. xxxiii, 1919, pp. 459-65, seven text-figures. 
(1920 1 ) : Leaf-base Phyllodes among the Liliaceae. Bot. Gaz., vol. lxix, 1920, 
pp. 337-40, four text-figures. 
(1920 2 ) : Tendrils of Smilax. Bot. Gaz., vol. lxix, 1920, pp. 438-42, one plate. 
— (1920 3 ) : On the Leaf-Structure of certain Liliaceae, considered in relation to the 
* Phyllode Theory. Ann. Bot., vol. xxxiv, 1920, pp. 447-65, thirty-eight text-figures. 
(1921 1 ) : The Leaf-Structure of the Iridaceae, considered in relation to the Phyllode 
Theory. Ann. Bot., vol. xxxv, 1921, pp. 301-36, sixty-six text- figures. 
(1921 2 ) : Leaves of the Helobieae. Bot. Gaz., vol. lxxii, 1921, pp. 31-8, one plate. 
(1921 3 ) : Leaves of certain Amaryllids. Bot. Gaz., vol. lxxii, 1921, pp. 102-5, eight 
text-figures. 
— (1922 1 ) : On the Development and Morphology of the Leaves of Palms. Proc. Roy. 
Soc., B., vol. xciii, 1922, pp. 249-61, seven text-figures. 
(1922 2 ) : On the Leaf-tips of certain Monocotyledons, Linn. Soc. Journ., Bot., vol. xlv, 
1922, pp. 467-76, fourteen text-figures. 
Eichler, A. W. (1885) : Zur Entwickelungsgeschichte der Palmenblatter. Phys. Abhandl. a. k. 
Alcad. d. Wiss. Berlin, 1886 (for 1885), 28 pp., five plates. 
Hirmer, M. (1919) : Beitrage zur Morphologie und Entwickelungsgeschichte der Blatter einiger 
Palmen und Cyclanthaceen. Flora, N.F., Bd. 11 (G.R. Bd. hi), 1919, pp. 178-89, ten 
text-figures. 
Raciborski, M. ( 1900 ): Uber die Vorlauferspitze. Flora, Bd. 87, 1900, pp. 1-25, eight text- 
figures. 
Sargant, E., and Arber, A. (1915): The Comparative Morphology of the Embryo and Seedling 
in the Gramineae. Ann. Bot., vol. xxix, 1915, pp. 161-222, two plates, thirty-five 
text-figures. 
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