The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . ng margins. This iswhat is termed a follicle. Since, however, the ovules are on the unitedmargins, the midrib tends to interpose little orno resistance to a tendency to split or tear alongits fold. Such dehiscence by both dorsal andventral suture gives us the legume or type is the siliqua (or when shortenedand broadened the silicula) of Crucifera. Herethe placental edges of two united carpels de-velop a transverse septum which div
The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . ng margins. This iswhat is termed a follicle. Since, however, the ovules are on the unitedmargins, the midrib tends to interpose little orno resistance to a tendency to split or tear alongits fold. Such dehiscence by both dorsal andventral suture gives us the legume or type is the siliqua (or when shortenedand broadened the silicula) of Crucifera. Herethe placental edges of two united carpels de-velop a transverse septum which divides thefruit; and this is left when the lobes split away,as so familiarly in honesty. Among united ovaries which readily splitopen at the united margins {scpticidal) we maynote that of gentian (), while the more fa-miliar three-celled ovary of a violet, with itsparietal placentation, gives a characteristic exam-ple of dehiscence along the midribs of the unitedcarpels, so opening the loculi (locnlicidal). Inthe five-celled capsule of the geranium ()the carpellary leaves separate not only at thesides but also at the base, so curling inwards. Fig. I.— f. follicle; e, legume: d. silicula; c, cap-sule of henbane; b, of violet; a, of poppy. and projecting the seed. Where, however, theplacentae remain more or less completely upon acentral column from which the valves are de-tached, the dehiscence is said to be septifragal. In henbane (Anagallis). etc., the dehiscenceis circular (circuiiiscissile). Many-celled cap-sules are numerous in which the leaf-openingor dehiscence is greatly reduced from complete-ness ; witness the valvular and porous dehiscence FRUIT of the Lychnis and of the poppy cases clearly point us to those of carpelswhich do not open at all. Such indehiscentfruits, produced from carpels so persistentlyembryonic, are usually short, few or one-ovuled,and, for the most part, little specialized. Thusthe follicle of the Ranuncuhcccc of more specia
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1908
