HYDKOPHYLLACE.E 247 



different species even of the same genus. Orbicular, obovate, 

 oval, ovate and linear types occur, with some slight modifica- 

 tions. 



A number of species of Nemophila, including N. maculata 

 (fig. 530), have orbicular or suborbicular cotyledons, the 

 petioles of which are dilated and more or less connate. 

 The first two leaves are pinnatisect with three segments, the 

 terminal one of which is the largest and more or less deeply 

 trifid. The following four or more leaves have five segments, 

 the terminal one of which is the smallest. N. parviflora agrees 

 somewhat with the above type, but the primary leaves are 

 more distinctly in pairs, and the first two are less deeply 

 divided. The seedling of N. phacelioides is chiefly notable 

 for the much greater size of all its parts. The cotyledons 

 are rather strongly penninerved, reticulate and hairy. The 

 first two leaves are pinnatisect with oblong and cuneate, 

 sometimes emarginate segments. The segments of the next 

 two leaves are more or less deeply toothed or lobed ; and all 

 are hairy like the cotyledons. 



A different type of seedling is met with in Nemophila 

 insignis. The cotyledons are obovate-oblong, emarginate, tri- 

 nerved and hairy. The first four leaves are pinnatifid with 

 rounded segments. The cotyledons of Phacelia bipinnatifida 

 are oval. The first leaf is triangular, subcordate at the base, 

 and shallowly lobed. The next leaf is more decidedly charac- 

 terised in this way, and has sometimes a separate segment or 

 two cut away from the main portion of the lamina. The third 

 leaf is more oblong and more deeply divided. 



The whole seedling of Eomanzoffia sitchensis closely re- 

 sembles that of a Eanunculus. The base of the petioles of 

 the cotyledons and leaves is dilated and sheathing. The 

 lamina of the cotyledons is roundly-ovate or triangular, tri- 

 nerved and glabrous. The first four leaves are palmately 

 five-nerved and lobed with rather deep auricles. Wigandia 

 Vigieri (fig. 532) is notable for the very small size of its ovate 

 or rhomboid cotyledons. The first pair of leaves are ovate 

 and entire, while the second pair are serrate. Succeeding 

 leaves are much larger, oblong with a cordate base, and 

 ultimately attain a great size. 



