60 Scientific Intelligence. 
carpels; also that each ovule answers to the lobe of a leaf. See 
Ann. Sci. Nat. for 1869, published in 1871. Ina following paper,on | 
The Anatomy of the Flower of Santalacew, Van Tieghem dem — 
flower of Zhesium and — 
Osyris, and draws the conclusion that each ovule, one for each of 
) 
talon of a carpel. From a corresponding study of the vascular — 
bundles of the sepals and superposed stamens, he likewise infers 
being here a separate and special lobe of the carpel. Thus, he 
concludes, disappears another example of so-called axile placents 
tion, as it falls under the general law which he expresses esse 
tially as follows:—The embryo-sac is always a cell of the pare 
chyma of a carpellary leaf; the ovule which contains this sa¢ 8 — 
always a lobe or part of the tissue of this leaf—more or less trams 
formed, more or less separated from the rest of the leaf. A. @ 
8. Tieghem, Comparative Anatomy of the Cycadacee, Conifa®, — 
and Gnetacew.—The principal results of this investigation (com 
e ; 
examined the distribution of the vascular bundles, in 
universal plan are the following. : 
This axillary branch reduced to its first leaf, and ovuliferous, ® 
commonly of the second generation; but sometimes of the third 
( co and Zasus), or even of the fourth generation (Tor 
The carpellary leaf bears the ovules either on its base (Z#w% 
Cupressus, &c.), or on its middle (Pinus, Sequoia, &c.), or tow: ard 
