308 SEED-STRUCTURE OF RAFFLESIACER AND HYDNORACE®. 
ON THE STRUCTURE OF THE SEEDS OF THE. 
RAFFLESIACEH AND HYDNORACEZ. 
By H. Count Sorms-Lavsacu. 
(Tas. 151, 152.) 
have come to light which may be of importance in determining the 
position of this family in a systematic arrangement. Ria 
Very little has been written on this subject, and the published 
information is exceedingly incomplete. By far the most important 
contribution is to be found in Robert Brown’s second paper on Rafflesia 
Arnoldi,* wherein he fully describes the structure of the fruit. He 
rightly observes that the seed contains a few-celled embryo, lying | 
enclosed within a thin coating of albumen. nd, apparently on 
small spherical body seated in the conte of the seed, and built up of 
numerous minute cells. But the long embryo cord, or cellular 
channel which connects it with the outer surface of the albumen, was 
overlooked. : 
Finally, Robert Brown failed to discover the embryo of Cytinus. 
He compares the whole mass contained within the testa of the seed to 
the homogeneous embryo of Orchids; not omitting, however, to mention 
cellular bodies in question. Arguing from data furnished by De 
Candolle and Delisle, Brongniart¢ had already advanced the 
opinion ; and subsequent investigations by Planchon,{ Link, 
* Linn. Transact., xix., 221, tab. 22, etc. 
+ Brongniart, Obs. sur les genres Cytinus et Nepenthes, Ann. Sc. Nat. 
¢ Planchon, Des vrais et faux arilles. Montpellier, 1844, p. 19—22, . 1. 
5 dink, Jabresbericht fiir 1844. Compare also Botanische Zeitung, 1857, 
p. 700. 
