. Studies in fossil botany . Paleobotany. CLASSIFICATION OF CALAMARIEAE 75 tunities of observing the fossils in situ. Grand'Eury 1 distinguishes three great groups, represented respectively by Annularia, Catamites proper, and Calamodendron. The first group, Annularia (Fig. 33), is characterised by whorled leaves, usually more or less lanceolate in shape, attached to a stem of Calamitean structure, which is said to have attained only a small diameter, not exceeding 2 or 3 inches in the forms described. The struc- ture of the finer branches is very deli- cate, and the plants have been supposed t
. Studies in fossil botany . Paleobotany. CLASSIFICATION OF CALAMARIEAE 75 tunities of observing the fossils in situ. Grand'Eury 1 distinguishes three great groups, represented respectively by Annularia, Catamites proper, and Calamodendron. The first group, Annularia (Fig. 33), is characterised by whorled leaves, usually more or less lanceolate in shape, attached to a stem of Calamitean structure, which is said to have attained only a small diameter, not exceeding 2 or 3 inches in the forms described. The struc- ture of the finer branches is very deli- cate, and the plants have been supposed to be herbaceous aquatics. There is, however, very little evidence for this, and there is reason to believe that some at least of the An- nulariae, as, for example, A. stellata, were simply the branches of large Calamites. It has lately been shown that in this latter form the leaves were united at the base, to form a regular sheath, as in the recent Equiseta2 (cp. Fig. 12, p. 38). The fructifications of the Annulariae are called by Grand'Eury and Renault Bruckmannia ;. Fig. 33.—Annularia brervi/olia. Twigs, bearing whorled leaves. Nat. size. After Stur. 1 Bassin houiller du Gard, St. Etienne, 1890, p. 200. 2 See Eotonie\ "Aeusserer Bau der Blatter von Annularia stellata?' etc., Verhandl. bot. Ver. d. Prov. Brandenburg, Bel. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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