By Alexander W. Evans
The writer's genusAcromastigum( I zero) illustrates terminal branching from either lateral and ventral segments and is the one genus of the Hepaticae with which the latter kind of branching has been linked. The branches coming up during this unparalleled demeanour are flagelliform in personality, and every exhibits on the base a slim and incomplete underleaf. This represents the a part of the section that used to be now not focused on the formation of the department. within the writer's dialogue of branching within the leafy Hepaticae (II, p. 23), terminal branching from ventral segments is easily distinct because the "Acromastigztm" style, and its designated good points are mentioned. within the genus Bazzania, or M astigobryum because it is frequently known as, the ventral flagelliform branches are intercalary in starting place and come up within the axils of underleaves. with the exception of this crucial distinction the genera Acromastigum and Bazzania have a lot in universal, and the one species of Acromastigum which has up to now been well-known used to be origi nally referred, with a few doubt, to the genus M astigobryum. This species, that's referred to now as A. integrifolium (Aust.) Evans, is outwardly limited to Hawaii.
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Additional resources for A Revision of the Genus Acromastigum
Cells from a perichaetial bract of innermost series, X 225. The figures were drawn from the type-material. or nearly so for more than half its length and then curves gently forward. These features are clearest in leaves which are dissected off and spread out flat (Fig. 6, C, D). 12 mm. in width. The sinus, which is one-third to one-half the length of the leaf is acute and very narrow. The divisions, in consequence, may diverge at a small angle, lie in contact, or slightly overlap. Both divisions point obliquely forward in attached leaves, and the acute apices are tipped with a single A REVISION OF THE GENUS ACROMASTIGUM 39 cell or, on some of the dorsal divisions, with a row of two cells.
53) Some of the marginal teeth large and lobe-like; ventral leaf-divisions convex on the upper surface and without cellular outgrowths on the lower surface; cuticular tubercles present 28. A. lobuliferum (p. 157) 6. ) comb. nov. M astigobryum capillare Steph. Spec. Hepat. 6: 457. 1924. This minute New Caledonian species is known only from the original material, which the writer has had the privilege of studying; it may be recorded as follows: N e w C a I e d o n i a: plateau of Dogny, without date, A.
2 mm. in thickness. The cortical cells (Figs. 9, B; and II, A) are 40-80 fJ.