The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . ?. Fig. 2.—f, f, acbenes of buttercup; c, d. caryopsisof oat; a, b, achenes with pappus; g, lo-mentum; i. h, nutlets and ovary of borage:/, k, umbelliferous type of schizocarp. cence, although the tendency to this can beseen still to have some influence. Here the sep-arate portions (or mericarps), each resemblingan achene or nut, are two in number, and whenripe swing off upon the ends of a forked carpo-phore. So far all our fruits have been d
The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . ?. Fig. 2.—f, f, acbenes of buttercup; c, d. caryopsisof oat; a, b, achenes with pappus; g, lo-mentum; i. h, nutlets and ovary of borage:/, k, umbelliferous type of schizocarp. cence, although the tendency to this can beseen still to have some influence. Here the sep-arate portions (or mericarps), each resemblingan achene or nut, are two in number, and whenripe swing off upon the ends of a forked carpo-phore. So far all our fruits have been dry; but anew physiological principle of fruit-makingis necessary to comprehend those in which thepericarp is succulent. For, just as the effect offertilization is seen in many animals to extendbeyond the mere ovum to the parent organism,and also in many of the lowest plants, so it isin the case before us. Even in fruits which aredry on ripening we have seen that the ovaries orloculi, on which no demand is made for thegrowth of fertilized ovules, become reduced ordisappear. Sometimes it may be merely thecoats of the seed (as in the pomegranate) whic
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1908
