Organography of plants, especially of the archegoniatae and spermaphyta . Fig. 241. Astragalus , stalk of a leaf, the stipules of whichhave become concrescent around theaxis into a sheath st, at the top ofwhich its composition out of the twostipules is indicated. Fig. 242. Hedjsarum obscurum. Budin transverse section. /, oldest leaf withits stipular sheath si; II, second leafwith its stipular sheath sll; still, freeupper parts of the stipule of tlie third and size like that of the proper leaf-primordium. Sometimes, and this regularlytakes place in certain species, t
Organography of plants, especially of the archegoniatae and spermaphyta . Fig. 241. Astragalus , stalk of a leaf, the stipules of whichhave become concrescent around theaxis into a sheath st, at the top ofwhich its composition out of the twostipules is indicated. Fig. 242. Hedjsarum obscurum. Budin transverse section. /, oldest leaf withits stipular sheath si; II, second leafwith its stipular sheath sll; still, freeupper parts of the stipule of tlie third and size like that of the proper leaf-primordium. Sometimes, and this regularlytakes place in certain species, there arise between the two primordia of the leavesmore than two stipules so that the whorl is then more than the other hand there sometimes occurs a less number. In Galium palustre,for example, we find in the false whorl four similarly constructed one-nervedleaves which are distinguished only from one another by the fact that De Candolle, Vegetable Organography. English Edition by Kingdon, London, 1S41, ii. p. 2S6.:also M. Franke, Beitrage zur Morpholog
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