. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. t to certain modifica-tions, concerning wliicli the language of ^ is instructive. I have she«-n,he says, in another place, that the sphaero-spores, or quaternary reproductive bodies,wliich M. KUtzing has perhaps bettercalled Tetraspores, offer three modifica-tions. They are either little spheres,which dixdde into four wedge-shaped par-ticles with a round base (Delesseria, Ce-ramium, &c.) ; or oVjlong bodies, wliichare cut across into four distinct spores(Hypnea, Caten
. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. t to certain modifica-tions, concerning wliicli the language of ^ is instructive. I have she«-n,he says, in another place, that the sphaero-spores, or quaternary reproductive bodies,wliich M. KUtzing has perhaps bettercalled Tetraspores, offer three modifica-tions. They are either little spheres,which dixdde into four wedge-shaped par-ticles with a round base (Delesseria, Ce-ramium, &c.) ; or oVjlong bodies, wliichare cut across into four distinct spores(Hypnea, Catenella, &c,) ; or, finally, ob-long bodies, which divide vertically andtransversely, so as to fomi segments ofcylinders, rounded at one extremity, andtruncate at the other, as m mode of formation, and the essentialorganisation of these spores, is the samein each type, whether the tetraspores pro-ject beyond the tissue, or are organised inthe interior of the frond. When young,the tetraspores show no exterior mem-brane, but appear as a reddish spherule,the development of which may be followed. Fig. XI. * For the explanation of the terms invented to express these forms, see Decaisne in Ann. des Sc. ser. 17, 348. Fig. X.—1. Chondria obtusa ; 2 Griffithsia sphserica; 3. Gr. corallina. Fig. XI.—Magnified branch of Corallina officinalis ; 2. a section of its spore case (ceramidmm) withthe tetraspores in situ ; 3. a tetraspore ; 4. Cymopolia barbata ; 5. a cross section of the stem of Dasy-cladus clavaeformis, showing its rings of gro^vth. 24 CERAMIACEtE. [ in the different species of Gnffitlisia. We see them enlarge for a certain space oftime, and present the appearance of a rose-coloured globule ; but at a more ad-vanced period the external envelope dilates, becomes transparent, and the centralbody, considerably increased in size, tends to separate into four parts or distinct spores,each invested with a special envelope, and of the most brilliant c
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