376 OX SEEDLINGS 



the axis of the fruit, while the other is biconvex and fits 

 into the bend of its fellow. Both are very deeply auricled at 

 the base and fold over the back of the radicle nearly conceal- 

 ing all but the tip. The nutlets of Lallemantia peltata 

 are obovoid and smooth, but the transverse section is similar 

 to that of the last, and the cotyledons are broadly obovate, 

 shallowly auricled, and similarly disposed to those of Nepeta 

 nuda in order to conform to the shape of the seed. The 

 nutlets, the seed and the very short stout radicle of Prunella 

 grandiflora resemble those of Lallemantia peltata. 



The nutlet and seed of the species of Scutellaria noticed 

 differ from all others in the Order. The nutlet of S. gale- 

 riculata is oval in outline, dor sally compressed with a ridge 

 on the ventral face to accommodate the radicle, and rugose 

 or tuberculated all over the surface. The ovule and seed are 

 camp} T lotropous. The cotyledons are oval in outline, plano- 

 convex, entire, and incumbent. The radicle is folded along 

 the ventral aspect of the seed, and is about half the length 

 of the cotyledons. S. altissima closely conforms to the above 

 in every respect, except that the radicle is slightly longer 

 or about two-thirds the length of the seed. The hilum is 

 therefore above the middle of the seed on the ventral aspect. 

 S. peregrina is closely similar to the above, but the radicle is 

 three-fourths as long as the cotyledons and seed, and is ac- 

 commodated in a ridge on the ventral face of the latter. The 

 absence of the auricles at the base of the cotyledons seems 

 to be peculiar to this genus, and is brought about by the 

 folding of the radicle on the ventral face of the seed, instead 

 of this being straight and situated between the bases of the 

 two cotyledons. 



Seedlings. The cotyledons are all of simple types. They 

 vary slightly in form according to that of the seed from 

 which they spring, but often undergo considerable modifica- 

 tion after germination. Many, though by no means all, of 

 those observed may be reduced to three types. One of the 

 more common is that represented by Salvia Columbaria (fig. 

 590) which has triangular, obtuse, emarginate cotyledons 

 rather deeply auricled at the base. This form is due to 

 that of the seed, which the embryo wholly occupied as ex- 



