304 OX SEEDLINGS 



in each cell, and are oblong, rounded at either end, deeply 

 concave on one face and deeply ridged and furrowed on the 

 dorsal or convex aspect. The short funicle is partly bidden 

 at one end of the groove. The embryo is very similar to that 

 of V. salicifolia, but relatively to the seed is very much 

 shorter. 



A fourth type occurs in V. hederaefolia (fig. 564) which 

 bears only two ovules in each cavity of the ovary. The seed 

 is large compared with any of the above, V. Buxbaumii excepted : 

 it is deeply concave on the ventral face by the inrolling of the 

 edges and the stout funicle arising from the centre of the 

 cavity is almost or quite concealed. The seed both in 

 longitudinal and transverse section greatly resembles that of 

 a species of Galium. The embryo is much larger than that 

 of V. Buxbaumii, situated at the upper end of the seed, and 

 slightly curved in conformity with it. 



In Melampyrum the seeds closely resemble, in form, 

 size and colour, the pupae of Ants ; and I have observed that, 

 whether by mistake or design, they are sometimes carried off 

 by Ants into their nests. It is possible therefore that the 

 similarity may be of use, as assisting in their dispersion. 



Seedlings. The cotyledons in this Order are generally 

 moderate in size, and sometimes even small. The largest 

 observed are some of the annual species of Veronica, the seeds 

 of which are large and few in a capsule. They also become 

 greatly elongated in many species of Linaria by intercalary 

 growth after germination. They are always of simple types, 

 and about half a dozen rather distinct kinds were observed. 



The cotyledons of Veronica salicifolia are ovate or almost 

 lanceolate and very small. The first two pairs of leaves are 

 small, lanceolate and entire. Succeeding ones are more or 

 less serrate and gradually increase in size, but retain the 

 same shape. The ultimate ones are oblong-lanceolate, serrate 

 and trinerved. The cotyledons of an unnamed species of 

 Scrophularia are lanceolate and rather elongated. The first 

 pair of leaves are broadly ovate and entire. 



Scrophularia chrysantha may serve as a type with broadly 

 ovate and entire cotyledons. The first pair of leaves are 

 elliptic, and entire. The cotyledons of Ehodochiton volubile 



