DICOTYLEDONOUS EMBEYO. 



339 



sides, and having distinct venation, as in Eicinus (fig. 605), Jatropha, 

 Euonymus, etc. In the former case they are called fleshy, or seminal 

 lobes ; in the latter, foliaceous, or seminal leaves. 



Cotyledons are usually entire and sessile. But they occasionally 

 become lobed, as in the Walnut and the Lime (fig. 606), where the 

 cotyledon, c, has five lobes ; or petiolate, as in Geranium molle (fig. 

 607 p) ; or auriculate, as in the Ash (fig. 608 o). Like leaves in the 

 bud (see Vernation, p. 110), cotyledons may be either applied directly 

 to each other (fig. 605), or may be folded in various ways. In the 



JFig. 608. 



Fig. 609. 



Pig. 610. 



Fig. 611. 



Almond (fig." 596) they lie in the direction of the axis. In other cases 

 they are folded laterally, condupKcate (fig. 609) ; or from apex to base, 

 rec}inate (fig. 222 a, p. Ill); or rolled up laterally, so as partially to 

 embrace each other, convolute (fig. 610) ; or rolled up like the young 

 fronds of ferns, cininate (fig. 611). In these cases, both cotyledons 

 follow the same direction in their foldings or convolutions, but, in 

 other instances, they are folded in opposite directions, resembling the 



Fig. 605, Embryo of Ricinus comimmis talcen out of tlie seed (see fig. 579, p.'329), and cut 

 transversely. The two halves are separated so as to show the two cotyledons, c, applied to 

 each other, r, Badiole. Fig. 606. Bmhryo of the Lime, r. Radicle, c. One of the divided 

 or palmate cotyledons. Fig. 607. Emhryo of Geranium moUe. r, Radicle, c, Cotylec^ons 

 attached to the coUar by a stalk or petiole, p. Fig. 608. Embryo of the Ash. r. Radicle, 

 c, one of the cotyledons, o o, Auricular appendages to the cotyledon. Fig. 609. Embryo 

 of Brassica oleracea, Cabbage, r. Radicle, o. Cotyledon. 1, Entire embryo. 2, Embryo 

 out transversely, showing the cotyledons folded on the radicle or conduplicate. The radicle 

 is dorsal, or on the back of the cotyledons. Fig. 610. Embryo of Punioa Granatum, 



Pomegranate, cut into two halves. The upper half removed to show the convolute coty- 

 ledons, c, Radicle. Fig. 611. Circinate embryo (spirolobese) of Bunias orientalis. 



