Archive image from page 288 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 p. 389 Agardh, Alg. Fig. 280. Polysiphonia ferulacea Suhr, J. Ag. Part of a filament with a nearly ripe cystocarp. (About 125:1). Fig. 281. Digenia simplex (Wulf.) Up- per end of branch with tetrasporan- gia. (About 125:1). 194. J. Medit., p. 147; Spec. Alg., vol. II, pars 3, p. 845. Harvey, W. H., Nereis , part II. p. 30. Falkenberg, P., Rhodomelaceen, p. 159, pi. 9, figs. 25- 29. Conferva simplex Wulf., Cryptogama Aquatica, p. 17. Cfr. De-Toni, Sylloge Alg
Archive image from page 288 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 p. 389 Agardh, Alg. Fig. 280. Polysiphonia ferulacea Suhr, J. Ag. Part of a filament with a nearly ripe cystocarp. (About 125:1). Fig. 281. Digenia simplex (Wulf.) Up- per end of branch with tetrasporan- gia. (About 125:1). 194. J. Medit., p. 147; Spec. Alg., vol. II, pars 3, p. 845. Harvey, W. H., Nereis , part II. p. 30. Falkenberg, P., Rhodomelaceen, p. 159, pi. 9, figs. 25- 29. Conferva simplex Wulf., Cryptogama Aquatica, p. 17. Cfr. De-Toni, Sylloge Alg., vohlV, p. Ill, p. 963, where more synonyms are named. Regarding its anatomy and morphological building upon the whole I refer to Falkenberg's exhaustive description 1. c. Digenia simplex occurs both in shallow water and rather exposed places and in deep water. The different localities determine to a large extent the development of the plant; in the first mentioned places the plant is robust, of low growth, about 5—'6 cm high and much ramified, in deep water on the other hand I have gathered specimens about 20 cm high and nearly unbranched. Its stiff, tough stem is a very attractive growing place for numerous small algæ which commonly cover its thallus to such an extent that only the quite young tips are free.
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