. Fossil plants : for students of botany and geology . Paleobotany. VIIl] MARCHANTITES. 233 Order Marchantiales. The plant-body is always thalloid, bearing rhizoids on the lower surface, and having an epidermis with pores limiting the upper or dorsal surface. Marchantites. This convenient generic name was proposed by Brongniart in 1849^; it may be briefly defined as follows: Vegetative body of laminar form, with apparently dichoto- mous branches, and agreeing in habit with the recent thalloid Hepaticae, as represented by such a genus as Marchantia. The name Marchantites is preferable to Marcha
. Fossil plants : for students of botany and geology . Paleobotany. VIIl] MARCHANTITES. 233 Order Marchantiales. The plant-body is always thalloid, bearing rhizoids on the lower surface, and having an epidermis with pores limiting the upper or dorsal surface. Marchantites. This convenient generic name was proposed by Brongniart in 1849^; it may be briefly defined as follows: Vegetative body of laminar form, with apparently dichoto- mous branches, and agreeing in habit with the recent thalloid Hepaticae, as represented by such a genus as Marchantia. The name Marchantites is preferable to Marchantia, as the latter implies identity with the recent genus, whereas the former is used in a wide sense and refers rather to a definite form of vegetative body than to a particular generic type. 1. Marchantites erectus (Leckenby). Fig. 49. This species may be described as follows: The thalloid body is divided into spreading dichotomously branched segments, obtusely pointed apically. The slightly wrinkled surface shows a distinct and comparatively broad darker and shorter median band, with lighter coloured and thinner margins. In 1864 Leckenby described this plant from the Lower Oolite beds of the Yorkshire coast near Scarborough, as Fucoides erectus, regarding it as a fossil alga. I recently pointed out. Pig. 49. Marchantites erectus (Leok.). From the type-specimen in the Woodwardian Museum. Nat. size. 1 Brongniart (49) p. 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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