=664. Increase in size during seed formation.=—Accompanying this extra growth of the different parts of the ovule in the formation of the seed is an increase in the size, so that the seed is often much greater in size than the ovule at the time of fertilization. At the same time parts of the ovary, and in many plants, the adherent parts of the floral envelopes, as in the apple; or of the receptacle, as in the strawberry; or in the involucre, as in the acorn; are also stimulated to additional growth, and assist in making the fruit. =665. Synopsis of the seed.= { {Aril, rarely present. { { { {Ovular coats (one or two usually { { present), the _testa_. { { { {_Funicle_ (stalk of ovule), _raphe_ { { (portion of funicle when bent on { { to the side of ovule), { {_micropyle_, _hilum_ (scar where {_Ripened ovule._ { seed was attached to ovary). { { { {_Remnant of the nucellus_ (central _The seed._ { { part of ovule); sometimes { { nucellus remains as { {_Perisperm_ 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 endospermis transferred to the { cotyledons which become fleshy(exalbuminous seeds). =666. Parts of the ovule.=—In fig. 401 are represented three different kinds of ovules, which depend on the position of the ovule with reference to its stalk. The funicle is the stalk of the ovule, the hilum is the point of attachment of the ovule with the ovary, the raphe is the part of the funicle in contact with the ovule in inverted ovules, the chalaza is the portion of the ovule where the nucellus and the integuments merge at the base of the ovule, and the micropyle is the opening at the apex of the ovule where the coats do not meet. [Illustration: Fig. 401. _A_, represents a straight (orthotropous) ovule of polygonum; _B_, the inverted (anatropous) ovule of the lily; and _C_, the right-angled (campylotropous) ovule of the bean. _f_, funicle; _c_, chalaza; _k_, nucellus; _ai_, outer integument; _ii_, inner integument; _m_, micropyle; _em_, embryo sac.] Comparison of Organ and Member.