» 1899 PODOPHYLLUM PELTATUM : 421 
spring, the cotyledons becoming visible by the end of April, 
‘Atthis stage (fig. 7) the seedling shows a well-developed pri- 
“mary root, X, and two cotyledons, the blades of which are folded 
“wound each other and borne upon long petioles, which are 
wnited to their full length so as to form a cylindrical, hollow 
tbe. The plumule, P, is very minute and located at the bottom 
-of the cotyledonar tube. Fig. 2 shows another seedling at a 
‘more advanced stage, in which the cotyledons have become 
infolded so as to show their final shape, 
~ breadly elliptical with the apex slightly 
‘arginate. The primary root, R, has 
) begun to branch with a pair of lateral roots, 
7 hdeveloped close beneath the plumule, P, 
| ada few others farther down. The coty- 
| ledonar sheath, formerly bent in order to 
_ Metrate the ground, has stretched itself 
— and is stil] enclosing the plumule. This 
lst st 
i $ no further development; 
tence the cotyledons are the only assimi- 
_ Ming leaves of the plant during its first 
bag at 8rowth. A similar manner of 
] Eminating, With the plumule inactive dur- 
| OB the first year, is also characteristic of 
“te Canadensis (Ranunculacex), but 
Petioles of the cotyledons are free, very | 
sand slender, ! 
In Podophy lum £modi, the germination yygs,1 and 2. Seedlings 
; Which has been studied by A. Dickson, of Podophyllum pellatum; 
‘Plumule may develop during the first Batural size. Explanation 
=» and the first leaf is green, with a cae 
Pe tiole and peltate blade. No scale-like leaves are figured 
1, ed. It is strange that Sir John Lubbock, who gives a 
> -ount and illustration of P Emodi, does not seem to 
* known of Professor Dickson’s paper upon this subject, and 
