. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. EPIDERMIS. 105 The epidermis of the under side of the leaf of Ficus elastica has similar, but smaller and more scattered cystoliths. The same structures have been proved to exist in all other species of Ficus which have been investigated on this point, the form and size varying according to the species. The cystolith-cell has in other species a much broader outer wall at the surface of the epidermis than that in Ficus elastica (e. g. F. australis, salicifolia), or its thick outer wall itself ris
. Comparative anatomy of the vegetative organs of the phanerogams and ferns;. Plant anatomy; Ferns. EPIDERMIS. 105 The epidermis of the under side of the leaf of Ficus elastica has similar, but smaller and more scattered cystoliths. The same structures have been proved to exist in all other species of Ficus which have been investigated on this point, the form and size varying according to the species. The cystolith-cell has in other species a much broader outer wall at the surface of the epidermis than that in Ficus elastica (e. g. F. australis, salicifolia), or its thick outer wall itself rises as a more or less long hair-like apex above the latter (Ficus Carica, montana, ulmifolia). Other Urticacese have similar cystolith-cells, and cystoliths in the epidermis : species of Parietaria, Boehmeria, Forskahlia tenacissima, Celtis, Moms, Broussonnetia, Humulus, Cannabis, Conocephalus, Urtica (Payen). A form differing from the round or oval is shown by the bodies in question in Pilea decora, densiflora ? (Weddell), Urtica macrophylla (Fig.' 45). The cystolith is here spindle-shaped, straight or with two curved legs (Pilea densiflora ?), it lies in a cell of form similar to itself, of which the greatest diameter is parallel to the epidermal surface, and it is attached to the middle of the outer wall of the cell by a stalk, which arises from the middle of one side of it. The structure of the spindle-shaped cystoliths is the same as that of the round ones. In the Urdcacese the cystoliths are absent in Ulmus and Dorstenia (Payen).. Fig. 45.—Urtica macrophylla; piece of the epidermis with cystolith-ceUs, from the upper side of the leaf; transverse section {225). The cystoliths of the Acanthaceae, which were first found by Gottsche (in Schacht, /. c), resemble in structure those of the Urticacese: their form is seldom round (Justicia carnea, Schacht), usually spindle-shaped, or like a transversely halved spindle. Their attachment by a stalk is also often similar to that abo
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Keywords: ., bookcentury1800, bookdecad, booksubjectplantanatomy, bookyear1884
