334 



MOKPHOLOGY. 



The seed. 



Ripened, ovule. 



665. Synopsis of the seed. 

 Aril, rarely present. 

 Ovular coats (one or two usually present), the 



testa. 

 Fimicle (stalk of ovule), raphe (portion of 

 funicle when bent on to the side of ovule), 

 micropyle, hihim (scar where seed was 

 attached to ovary). 

 Remnant oj the nucellus (central part of 



ovule); sometimes nucellus remains as 

 Perispenn in some albuminous seeds. 

 Endosperm, present in albuminous seeds. 



Embryo within surrounded by endosperm when this is present, 

 or by the remnant of nucellus, and by the ovular coats which 

 make the testa. In many seeds (example, bean) the endo- 

 sperm is transferred to the cotyledons which become fleshy 

 (e.xalbuminous seeds). 



666. Parts of the ovule. — In fig. 401 are represented three 

 different kinds of ovules, which depend on the position of the 



Fig. 401. 

 A, represents a straight (orthotropus) ovule of polvRonuni; B. the in\'ertcd 

 (anatropous) ovule of the lily; and C, the right-angled (eampylotroptis) ovule oi 

 the bean. /, funicle; c, chalaza; fe, nucellus; ai, outer integunient ; ii, miier 

 integument; )h. micropyle; em, embryo sac. 



oN'ule with reference to its stalk. The funicle is tlie stalk of the 

 ovule, the hiluni is the point of attaclinient of tlie ovule with 

 the ovar\', the r;iphe is tlic p;ui of tlic funicle in contact with 

 the ovule in in\crle(l o\iilcs, tlie clialaz;i is the portion of the 

 o\'ule wlierc tlie nucellus ami the integuments merge at the base 

 of the ovule, and the niiii'o|)\lc is the opening at the ape.x of 

 the ovule where the coals tlo not meet. 



