. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 25. Fila erecta parce ramosa, 5â6/i lata, cellulis diametro triplo vel 4 plo longioribus, cylindricis, in parte superiori filorum cellulis tenuioribus, 3â4;/ latis, chromatophorum, ut videtur, parietale pyrenoide laterali munitum continentibus. Sporangia monospora, fusiformia apice truncato, sessilia aut pedicellata, sparsa aut unilateraliter seriata, 4â5^ lata, 10â 11/ji longa. This small species was found upon old leaves of Caiilerpa taxijolia. Only a single tuft was met with growing in com
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 25. Fila erecta parce ramosa, 5â6/i lata, cellulis diametro triplo vel 4 plo longioribus, cylindricis, in parte superiori filorum cellulis tenuioribus, 3â4;/ latis, chromatophorum, ut videtur, parietale pyrenoide laterali munitum continentibus. Sporangia monospora, fusiformia apice truncato, sessilia aut pedicellata, sparsa aut unilateraliter seriata, 4â5^ lata, 10â 11/ji longa. This small species was found upon old leaves of Caiilerpa taxijolia. Only a single tuft was met with growing in com- pany with Acrochætium seriatum and other small epiphytes. It forms a dense low tuft up to about 400,« high. The basal part consists of creeping filaments (Fig. 11 d) fusing more or less together but, it would seem, easily separ- able. The cells in these filaments are Fig. 17. Acrochætium netro- rather short, often nearly isodiametric but ^^'PJ^"^ f'^ H^'^^ents' ^'tli much irregular in shape. From nearly all sporangia, d, base of the of these cells with the exception of those P A'a '-f' ^^^nà ^^Kx^' ^' ^ 4o0 : 1; a, 600 : 1). near the margin erect filaments arise. These (Fig. 17 a) are multilaterally ramified but not much so, and taper somewhat towards the upper end (Fig. 17 c). They consist of cylindric cells about 18â20/j. long; in the basal part these cells are about 5â6 ^ broad while those at the summit are only 3â4//. The shape of the chromatophore was not clearly visible, so far as I have been able to see it was parietal with a lateral pyrenoid ; the last mentioned was more visible in the sporangia (Fig. 18). The latter have a very characteristic shape (Figs. 17 b, 18); they are fusiform with a truncate p. g summit, about 4â5 fx broad and 10â11 /u long. Acrochætium They are mostly sessile but often also pedicellate. netrocarpum f^ey occur more or less in a series or may be more nov. spec. '' "^ FUamentwith scattered. sporangia. (About
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