94 
[Memoria I.] 
Win ter — Cenno fisiologico sopra la Phoenix daclilvleia. - R. Orto bot. Firenze 1888. 
White — On the polystelie of roots of Orchidaceae. — Toronto 1907. 
W'orsdell — The natur of the vascuiar system in the stem ol' certains dicotyledonsorder. — Ann. of. Bot. 
1900. 
— Contribution to the comp, anat. of. the Cycadaceae. — Trans. Lino. Soc. London V, 1900. 
— The evolution of the vascuiar tissue of plants. — P)Ot. Gaz. 1902. 
— Fasciation: its Meaning and Origin. — New Phvtol IV, 190,. 
Zeiller — Elt-ments de Paléobotanique. — Paris 1900. 
Zen etti — Das Leitungssystem ini Stamm von Osinninìa regali s und dessen Uebergang ini Blattstiel. — Bot. 
Zeit. 1895. 
Zittel — Traité de Paleontologie. — Paris 1891. 
Zodda — SuU'accresciniento dello stipite di alcune Palme. Malpighia XVIII, 1904. 
