. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: List of species. 441 12. Colpoinenia simiosa (Roth) Derb, et Sol. 13. Hydroclathrus cancellatus Bory. 14. Rosenvini^ea Saiictæ Cnicis Borgs. In the description of this plant (vol. 1, p. 178) the locality and occurrence has been omitted. It was found in shallow water near the shore in a sheltered place this being protected from the open sea by coral reefs. It was attached to small stones. It was gathered in the month of January. St. Croix: Longford. 15. Castagnea Zosteræ (Mohr) Thur. 16. Myrionema vulgare Thur. Thuret, G., in Le J
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: List of species. 441 12. Colpoinenia simiosa (Roth) Derb, et Sol. 13. Hydroclathrus cancellatus Bory. 14. Rosenvini^ea Saiictæ Cnicis Borgs. In the description of this plant (vol. 1, p. 178) the locality and occurrence has been omitted. It was found in shallow water near the shore in a sheltered place this being protected from the open sea by coral reefs. It was attached to small stones. It was gathered in the month of January. St. Croix: Longford. 15. Castagnea Zosteræ (Mohr) Thur. 16. Myrionema vulgare Thur. Thuret, G., in Le J o lis, Liste des algues mar. de Cherbourg, p. 82. Sauvageau, C, Sur quelques Myrionémacées (Ann. sc. nat., Bot., Sér. 8, Tome 5, 1897, p. 185). Upon an old Sargassum, together with many other epi- phytic and partly endophytic algæ, a Myrionema also occurred which I think referable to M. vulgare. Fig. 415 a shows a part of the basal disc; it consists of creeping fil- aments whose cells are from 5 to 7 ja thick. And fig. 415 b shows pluri- locular sporangia from the older parts of the plant; the sporangia are about 7 |u thick. The hairs have a rather long sheath at their base; they are about 7—8 IX thick. This plant was found in the harbour of St. Thomas. A very similar plant was found upon Chætomorpha antennina gathered at »Northside«, St. Croix in a very exposed place (Fig. 415 d).. Fig. 415. Myrionema vulgare Thur. a, b, c, parts of a plant from St. Thomas, d, part of a plant from St. Croix, e, part of a plant from St. Jan. (a, 5, c, r/, about 275:1. e, about 200:1.). 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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