. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. ve been the sub-ject of some elaborate observations by Mr. Griffith,(Calcutta Journal, vol. v.), who elevates each into aSuborder, and throws an entuely new light upontheir stnicture. He regards them as haiiug truesexes, the male being certain necklace-shaped threadsfomid at an early stage, in contact with what he de-nominates an orthotropous o^^llum. But strange tosay, this so called oilum, instead of gi\Tng butli toan embryo, becomes the parent of reproductive bodies of two t
. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. ve been the sub-ject of some elaborate observations by Mr. Griffith,(Calcutta Journal, vol. v.), who elevates each into aSuborder, and throws an entuely new light upontheir stnicture. He regards them as haiiug truesexes, the male being certain necklace-shaped threadsfomid at an early stage, in contact with what he de-nominates an orthotropous o^^llum. But strange tosay, this so called oilum, instead of gi\Tng butli toan embryo, becomes the parent of reproductive bodies of two totally different kmds, ha^dng not even the smallest resemblance the one to theother, although the matrix out of which they are evolved is identical at an eai-ly periodof the organisation. I regi-et that Mr. Griffiths most curious memoii only reached meas tliis sheet was going to press, so that it was impossible to have cuts prepared toillustrate his observations, for wliich the reader is refeiTed to the work above I can do is to give in a note the substance of his descriptions of Salvmia andAzolla.*. * Salvinia verticillata.—Male organs? articulated hairs on the stalks of the o\Tila • each joint con-taining a nucleus and a brownish fluid ; Ovula nearly sessUe, concealed by the roots, and partly covered Fig. L.—Marsilea pubescens in different states of germination; advancing from 1. the spore, up to perfect young plant. Fig. Pilularia globulifera ; 2. spore-case, natural size, bursting ; 3. the same younger andmagniiied ; 4. a section of the spore-case, showing the large and small spores, (after Valentine). Lycopodales.] MARSILEACE^. 73 Delile has published an account of the germination of Isoetes setacea, from which itappears that its sporules sprout upwards and downwards, forming an intermediate soUdbody, which ultimately becomes the stem, or corm ; but it is not stated whether the pointsfrom which the ascending and descending axes take their rise
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Keywords: ., bo, bookcentury1800, bookdecade1840, bookidvegetablekingdom00lind
