SIR J. LUBBOCK—PHYTOBIOLOGICAL OBSERVATIONS. 73 
original form. Nineteen days after germination (fig. 154) they 
become narrowly spatulate, or linear with an oval tip, no wider, 
or even sometimes rather narrower, than the greatest width of 
Fig. 151. Fig. 152. Fig. 153. 
ge 
Fig. 151. CEnothera micrantha : seedling. x3 
Fig. 152. Ditto: seedling, 7 days after germination. x 3. 
Fig. 153. Ditto: seedling, 9 days after germination. X 3 
Fig. 154. Ditto: seedling, 19 days after germination. Nat. size. 
the new portion, which closely resembles the leaf and is linear, 
somewhat broader in the middle, with two or three obsolete teeth 
on each side, ciliated at the margins and with a broad midrib. 
Here, therefore, we have an interesting group in which at 
first the cotyledons are very similar, but by subsequent growth at 
the base develop into several distinet types, in each case closely 
