. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 171. Amphiroa rigida Lamx. var. Antillana nov. var. Part of a regularly dichotomous thallus. (About 2 : 1). and taper evenly to the sum- mit where often the diameter scarcely reaches half the length of the above mentioned size. In the basal part the colour of the dried specimens is a ligth red-violet, towards the top almost white with a blue-violet tinge. The branches are spread- ing, the angle of the dicho- tomy being mostly obtuse, though sometimes acute. The joints are long, often reaching a length of more than one cm., cylindrical, an
. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 171. Amphiroa rigida Lamx. var. Antillana nov. var. Part of a regularly dichotomous thallus. (About 2 : 1). and taper evenly to the sum- mit where often the diameter scarcely reaches half the length of the above mentioned size. In the basal part the colour of the dried specimens is a ligth red-violet, towards the top almost white with a blue-violet tinge. The branches are spread- ing, the angle of the dicho- tomy being mostly obtuse, though sometimes acute. The joints are long, often reaching a length of more than one cm., cylindrical, and in their upper end, bifurcate, the nodes often (not always) occurring at rather a long distance above the dichotomy, one or sometimes even 2 mm. above it. In the upper end of the frond the dichotomy often does not occur, but the filaments are divided by nodes in a similar way as that found in the ramified parts of the thallus. Of the illustrations I have seen of this species my plant seems to come nearest to the above mentioned figure of Zanardini (Fig. B 1), but the ends of the branches of my plant are less tapering and not so curved as the ones in Zanardini's figure. From SoLMS - Laubach's description (1. c. p. 7) my plant seems to differ some- what. He says: "Sie zeich- nen sich durch unregelmässige Verzweigung und durch spitzwink- lige, wenig divergente Richtung der Aeste aus, daher denn stets kompakte dichte Rasen gebildet werden". As described above. Fig. 172. Amphiroa rigida Lamx. var. Antillana nov. var. Part of a more irregularly ramified thallus. (About 2:1).. 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 Dansk botanisk forening. Kbenhavn : Dansk botanisk forening
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