. A handbook of cryptogamic botany. Cryptogams. 126 VASCULAR CRYPTOGAMS which must be referred to the same group. To the same family as Calamites belong probably Astromyelon (Will.), and at least some species of Arthropitys (Gopp.). The degree of identity in structure of Calamodendron with Calamites is a point on which the best authorities are not yet in agreement. To the genus Calamitina (Weiss) (Asterophyllites, Ren., Calamocladus, Schmp.) belong a number of calamite stems found with the leaves still in connection with them. These are of very peculiar form, consisting of an ovate-lanceolate
. A handbook of cryptogamic botany. Cryptogams. 126 VASCULAR CRYPTOGAMS which must be referred to the same group. To the same family as Calamites belong probably Astromyelon (Will.), and at least some species of Arthropitys (Gopp.). The degree of identity in structure of Calamodendron with Calamites is a point on which the best authorities are not yet in agreement. To the genus Calamitina (Weiss) (Asterophyllites, Ren., Calamocladus, Schmp.) belong a number of calamite stems found with the leaves still in connection with them. These are of very peculiar form, consisting of an ovate-lanceolate basal portion, thickened and marked by a central furrow, and a narrowly-lanceolate acuminate apical portion ; the basal. Fig. 97.—Stems of Calamites. (After Weiss.) portion alone being very frequently preserved. The leaves do not coalesce laterally into sheaths ; on falling off they leave behind whorls of round or ovate scars. Bornia (Brongn.) (Archeeocalamites, Stur) is an older fossil occurring in the Devonian formation, differing from the more recent forms in the broad flat longitudinal ribs on the stem not alternating in adjacent internodes. In Annularia (Brongn.), which occurs only in the Carboniferous formation, the leaves are linear-lanceolate, and are penetrated by a single ' vascular' bundle ; those of each whorl are united laterally in their basal portion into a shallow saucer-shaped cup, through which the stem'. 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 Bennett, Alfred W. (Alfred William), 1833-1902; Murray, George Robert Milne, 1858-. London, New York, Longmans, Green, and Co.
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