524 



BOTANY 



TART II 



cannot be given, l)ut it may he mentioned that the germination of 

 most Gymnosperms is epigeal, but that the number of cotyledons may 

 amount to 6-10 {Pimis). 



HyrOGEAL germination is for the most part found in large-seeded 

 Dicotyledons, the cotyledons of which contain the stored reserve 



Fig. 494. — Seedlings, a, of Scorznnera 

 humilis; I, of Iris pseudacoriis. (After 

 Klebs.) 



Fig. 495. — Section through the upper part 

 of tlie fruit of Acrocomia sclerocarpa. S, 

 Tlie hard shell ; P, the plug which is 

 pushed out of the shell by the ger- 

 minating embryo, K ; E, endosi)erm. 

 (After Pfitzer.) 



Y 



Fig. 496. — Kamlelia Khcedii. The massive root of tlie 

 seedling (1) has broken out of the fruit. When 

 the plant separates from the fruit the root will 

 become inserted into the muddy soil. (Afti-r 

 Schimper's I'la nt-Geography.) 



materials (e.g. Vicia faba, Pisum, Aesculus, Juglans, etc.). It is char- 

 acterised by the cotyledons remaining enclosed in the seed-coat after 

 the root has penetrated into the soil ; the epicotyledonary stem emerges 

 from between the cotyledons, becomes erect and bears the later leaves 

 in the usual way. While there is a sharp morphological distinction 

 between the two types of germination, the difference is of little 

 systematic value; within the Papilionaceae many intermediate conditions 



