319 
127. Salisbury, E. J, On the relation between Trigono- 
carpus and Ginkgo. — Ann. Bot. Vol. 30, 1916. 
128. Schleiden, M. J, Sur la formation de l'ovule et 
l'origine de l'embryon dans les Phanerogames. — Ann. Sc. Nat. 
Bot. IL Série 11, 1839. 
129. Schleiden, M. J. Sur la signification morphologique 
du placentaire. — Ann. Sc. Nat. Bot. II Série 12, 1839. 
130. Schmitz, Die Blüthenentwickelung der Piperaceen. — 
Hanstein's Bot. Abhandl. Vol. 2, 1875. 
131. Schumann, K., Ueber die weiblichen Blüten der 
Coniferen. — Abhandl. bot. Vereins Prov. Brandenburg, 1903. 
132. Scott, D. H., Note on the occurrences of a seedlike 
fructification in certain palaeozoic lycopods. — Proc. Roy. Soc. 
London Vol. 67, 1900. 
133. Scott, D. H, Studies in Fossil Botany. — London 1909. 
134 Scott, D. H. and Maslen, À. J, The structure of 
the Palaeozoic seeds Trigonocarpus Parkinsoni Brongn. and 
Trig. Oliveri sp. nov. — Ann. Bot. Vol. 21, 1907. 
135. Seward, À. S., Fossil Plants. — Cambridge, 1919. 
136. Seward, À. S. and Gowan, Miss J, The Maiden- 
hair Tree Ginkgo biloba. — Ann. Bot. Vol. 14, 1900. 
137. Sinnott, E. W., The morphology of the reproductive 
structures in the Podocarpineae. — Ann. Bot. Vol. 27, 1913. 
138. Smith, F. G., Development of the ovulate strobilus 
and young ovule of Zamia floridana. — Bot. Gaz 
Vol 5071910. 
139. Smith, R. Wilson, The structure and development 
of the sporophylls and sporangia of Jsoetes. — Bot. Gaz. Vol. 
29, 1900. 
140. Sperk, Gustav, Die Lehre von der Gymnospermie 
im Pflanzenreiche. — Mém. Acad. St. Pétersbourg, VII Série, 
Tome XIII, 6, 1869. 
141. Spiess, Karl von, Ginkgo, Cephalotaxus und die 
Taxaceae. Eine phylogenetische Studie. — Oesterr. Bot. Zeitschr. 
B4252%53, 1902419058; 
142. Sprecher, À. Le Ginkgo biloba L. — Genève, 1907. 
143. Stenzel, K. G., Beobachtungen an durchwachsenen 
Fichtenzapfen. — Nov. Act. Nat. Cur. Vol. 38, 1876. 
