Organography of plants, especially of the archegoniatae and spermaphyta . ld develop furtherinto a foliage-leaf, the laying down of the lateral members of the leaf-laminaproceeds further, and between the lamina and the leaf-base there is also inter-calated a leaf-stalk byelongation of the upperpart of the transition from thekataphylls or bud-scalesto the foliage-leaves issudden; the first foliage-leaf follows directly thelast large kataphyll. Prunus Padus possessesstipules like other mem-bers of the cycle ofaffinity of the Rosaceae,but these are not, as hasbeen erron


Organography of plants, especially of the archegoniatae and spermaphyta . ld develop furtherinto a foliage-leaf, the laying down of the lateral members of the leaf-laminaproceeds further, and between the lamina and the leaf-base there is also inter-calated a leaf-stalk byelongation of the upperpart of the transition from thekataphylls or bud-scalesto the foliage-leaves issudden; the first foliage-leaf follows directly thelast large kataphyll. Prunus Padus possessesstipules like other mem-bers of the cycle ofaffinity of the Rosaceae,but these are not, as hasbeen erroneously sup-posed, constructed asbud-scales in the bud-scales are hereformed out of the leaf-base. It is interestingto notice the gradualtransition from theouter small bud-scales in the lateral buds to the inner larger ones. The middleline of the scale is traversed by a strand of elongated cells in which there areneither vasa nor tracheids. These are only found, small and few in number,in the scales higher up, forming three strands, a middle and two lateral ones. Fig. 258. 1-6, Prunus Padus. i and 2, bud-scales formed of the broadenedleaf-base; L, arrested primordium of the lamina ; j/, primordia of the stipulesseated on the leaf-base. 3, one of the uppermost scales of an unfolding^ bud,the three vascular bundles traversing the leaf-base have branched; st,stipules ; Z,, lamina; H, gland at base of lamina. The central portionbetween the cross-strokes becomes the petiole, the portion below the lowerstroke is that represented in the bud-scale. 4, young leaf; st, stipules; Z,,lamina. The cross-stroke marks the limit of the leaf-sheath represented in thebud-scale. 5 and 6, middle stages between bud-scale and foliage-leaf; 5/,leaf-base ; sf, stipules. See the text for further explanation. ~A and yB,Acer Pseudoplatanus. Bud-scales; L, lamina. The arrested lamina in 7 ^ isshown natural size. (Fig. 258, The scales end as do those of Acer in a pointlet, Z, which is the arrested pr


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