AND THEIR GERMINATION. 409 
occurs in Alismacee, a near ally of the Hydrocharidee ; besides which, they may not im- 
probably prove to have the embryo of Triurideæ, which would lend some further support 
to such a comparison. And if the Bromeliacee should prove endorhizal, such a subdi- 
vision of the epigynous families would not be unnatural, as they connect Hydrocharideæ 
and Marantacee. | 
The following is added as a provisional arrangement of the Endorhizæ and their allies, 
including especially all those families in which the radicle is enlarged; and the remainder 
of the class Endogens thus separated will, I believe, be found to form by themselves a 
very natural section. But it must be confessed that no entirely natural arrangement 
. ean be expected to be made until the structure of the embryo and its germination in all 
the families is definitely ascertained. 
ALL, 3 
Musacem. 
å Amomeæ. 
S Marantaceæ 
å ALL. 1. ^ op 
åg : LL. 4. 
& Mane Aun. 2. ? Bromeliaceæ 
~ Apostasiaceæ. : 2 . 
urmanniaceæ. Hydrocharideæ. ? Taccaceæ. 
ALL, 9, dax. d 
Commelynaceæ. ad 
å Mayaceæ. ALL 4. Triurideæ. 
S Xyrideæ. Philydraceæ. me 
£;| Eriocauloneæ. Juncaceæ. — 
EN ABL. 9. 
ar en Potamogetoneæ 
= | Restiaceæ. Nai xd ; 
Desvauxiaceæ. E T? : 
Cyperaceæ. 
Unner 
SE Zosteraceæ. 
RE 
BS 
~ 
= 
EXPLANATION OF THE PLATE. 
Tas. LXVIII. 
first protrusion, before the first leaf appears. 
Fig. 1. Nuphar lutea. The radicle at the time of its 4. his leaf is rudimentary, having no 
Fig. 2. The seed of the same after the first leaf has appeare 
DER secondary radicle protruded, which has a coleo- 
Fig. 3. The same, after the second leaf has formed, and a adicles, which succeed. 
| rhiza, The same coleorhiza appears on the MT N N Que plumule having been laid 
Fig. 4. An embryo of a Zannichellia, the membranous sheath con g 
open to show the position of its first and second €— is perfectly adherent to the surround- 
Fig. 5. A longitudinal section of the same, showing that the penes of a canal is formed for it. 
; “ | 
ing tissue, and that in the ungerminated embryo no 58 
VOL. XXII. 
