. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. of Peini is the type, whoseaffinity is clearly vath the Chenopods andAmaranths, from which it is distinguished by thecmious property ofconverting the base ofits thin membranoustubular calyx into atough or bony shellwhich acts as a peri-carp to the seed, whosereal pericarp is but amembrane. More-over, the tubular ca-lyx, the limb of whichis plaited in aestiva-tion, together withthe cm-ved embryoand farmaceous al-bumen, at all timesdistinguish Nyctagos;add to which, the ar-ticula
. The vegetable kingdom : or, The structure, classification, and uses of plants, illustrated upon the natural system. of Peini is the type, whoseaffinity is clearly vath the Chenopods andAmaranths, from which it is distinguished by thecmious property ofconverting the base ofits thin membranoustubular calyx into atough or bony shellwhich acts as a peri-carp to the seed, whosereal pericarp is but amembrane. More-over, the tubular ca-lyx, the limb of whichis plaited in aestiva-tion, together withthe cm-ved embryoand farmaceous al-bumen, at all timesdistinguish Nyctagos;add to which, the ar-ticulations of the stemare often tumid, as inCranesbills. Schlei-den states ( Wiegman^s Arch. 1839), that the Fig. CCCXLV. Fig. CCCXLVI. wood figm-ed at t. 42, Fig. CCCXLV.—1. Abronia mellifera ; 2. a flower separate ; 3. its stamens and pistil : 4. the pistilseparate ; 6. the fruit; C. seed magnified ; 7. a cross section of it; 8. the lower portion of the flower ofMu-abilis .Jalapa ; 9. its fruit ; 10. a perpendicular section of it. Fig. CCCXLVI.—risonia grandis. 1. a flower; 2. a pistil ; 3. a cluster of Chenopodales.] 507 p. 100, of the thiid edition of my Introduction to Botany, is that of a Pisonia, a genusbelonguig to this Order ; and he explains its singular structuie by supposuig it toconsist of numerous vascular bundles, which continue to be developed until they format last an almost continuous mass. The paienchjTna^liich separated them is therebycompressed into insulated patches, which are scattered through the completely formedwood in httle narrow vertical cords (strcenge), which, as regards their origin, may betermeti vertical medullary rays ; and he finds a similar structure m Amaranths, Beta,Atripliix, Chenopodium, and Peppers. As this organisation appears from Schultz(Nat. Syst. fig. 1. 2. 5. 6.), to be present also in Boerhaavia and Mirabilis, it would seemto be characteristic of the Order. I however find a very different structure inBoerha
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