. Dansk botanisk arkiv. Plants; Plants -- Denmark. 384 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. St. Croix and St. Thomas, collected by Ørsted and determined by J. Agardh, are kept in the Herbarium of the Botanical Mu- seum, Copenhagen. I have specimens which are quite identical with these. They seem to be Hke a more densely branched form of the present one. It seems to me very likely that the specimens I have referred to this species are only forms from more protected places, and those referred to the following species, Hypnea spinella, nothing else but forms from more exposed places. This species
. Dansk botanisk arkiv. Plants; Plants -- Denmark. 384 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. St. Croix and St. Thomas, collected by Ørsted and determined by J. Agardh, are kept in the Herbarium of the Botanical Mu- seum, Copenhagen. I have specimens which are quite identical with these. They seem to be Hke a more densely branched form of the present one. It seems to me very likely that the specimens I have referred to this species are only forms from more protected places, and those referred to the following species, Hypnea spinella, nothing else but forms from more exposed places. This species occurs in more protected places in shallow water, but it has also been dredged in deep sea at a depth of about 30 meters. It was found with tetrasporangia and cystocarps in the months of February and March. It is a common species along the shores of the islands. Geogr. Distrib.: Seems to occur in most warmer seas. 4. Hypnea spinella (Ag.) Kiitz. KüTziNG, Spec. Alg., p. 759. J. Agardh, Spec. Alg., vol. II, p. 453; Epicrisis, p. 565. Sphærococcus spinellus Ag., Spec. Alg., p. 323; Systema, p. 237. This plant forms small compact tufts upon rocks. The plant is very irregu- larly ramified (Fig. 369); the branches are issued in all di- rections, in some cases with larger distance between them, in others several branches are crowded together. Some of the branches grow out to main filaments, most of them be- come small, short, spinehke branchlets of variable length. These much branched fil- aments are felted between each others and further often anastomosing to each others Fig. 369. Hypnea spinella (Ag.) Kiitz. by means of rhizoids breaking Part of a plant with anastomosing q^^, everywhere from the thai- branches and fertile parts with tetra- „ sporangia (about 10:1). lus (I^ig. 359).. 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 resemb
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