. Elementary botany [microform]. Botany; Botanique. 96 DISPERSAL OF SEEDS fii agency of the wind, the fruits or seeds are very small- or they oppose a large surface to the wind. The large surface maybe merely due to the flattened form of the frdt or seed or It may be caused by the possession of wings or tufts of hair. It is to be noted that truits (or their carpels in the case of schizocarps) are closed and indehiscent, they (or the meri- carps) are the parts scattered, and adapted to aiu hspersal; the seeds in this case are passively Fig. ''°'?^ '"'^'^^ ;^e f^^its. But
. Elementary botany [microform]. Botany; Botanique. 96 DISPERSAL OF SEEDS fii agency of the wind, the fruits or seeds are very small- or they oppose a large surface to the wind. The large surface maybe merely due to the flattened form of the frdt or seed or It may be caused by the possession of wings or tufts of hair. It is to be noted that truits (or their carpels in the case of schizocarps) are closed and indehiscent, they (or the meri- carps) are the parts scattered, and adapted to aiu hspersal; the seeds in this case are passively Fig. ''°'?^ '"'^'^^ ;^e f^^its. But if the fruit dehisces, of Kim. or IS open { Gymnosperms), the seeds are the parts scattered, and, as a rule, it is thev and not the fruits which are adapted for transference to distant spots. The following table shows the cor eponding. Mechanism or Form. 1. Minute size. 2. Flattened form, 3. Wings. 4. Tufts of hair. Seeds Dispersed (Fruits dehiscent or open). Orchid (P>uit = capsule). Wallflower (Fruit = siliqua). Scotch Pine (is a Gym- nospenn), fig. 67. Willow, Poplar, Wilfow- herbs (Fruits are cap- sules). Fruits Dispersed (Fruits indehiscent or separating) Nutlets of Labiatae. Mericarps of many Um- belliferae (fig. 185). Samane (fig, 130) of Elm, Birch, and Sycamore. The achenes of many Composite (Dandelion, etc.) with a pappus (fig. 129). Achene of Clematis with a hairy style. Dispersal by clinging to fruits possess hooks, or rough or sticky surfaces, which cause^hem to adhere theTrnJ^i ^^T^Vl '''â "'^ against them. It is usually Seeds dispersed by being transported inside It IS to be noted that when the seeds or fruits are scattered by. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Groom, Percy, 1865-1931; Penhallow, D. P. (David Pearce), 1854-1910. A manual of
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
