Archive image from page 390 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 F. Børgesen: Rhodophyceæ of the Danish W. Indies. 383 The plant (Fig. 367) is characterized by the small, stellate, spiny branchlets found scattered upon the filaments. They have 3—5 rays and are peltately fixed to the branches. Tendrils are now and then present, but not upon all specimens. The plant forms rather large, richly ramified bushes up to about 20 cm high. A transverse section (Fig. 368) of the thallus shows rather large cells in the middle, smaller to- wards
Archive image from page 390 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 F. Børgesen: Rhodophyceæ of the Danish W. Indies. 383 The plant (Fig. 367) is characterized by the small, stellate, spiny branchlets found scattered upon the filaments. They have 3—5 rays and are peltately fixed to the branches. Tendrils are now and then present, but not upon all specimens. The plant forms rather large, richly ramified bushes up to about 20 cm high. A transverse section (Fig. 368) of the thallus shows rather large cells in the middle, smaller to- wards the periphery. The cortical layer consists of a single layer of cells which have a very thick cuticula often 25—30 thick. A longitudinal section shows that the cells in the middle are about 3—4 times longer than broad. The Acrochætium Hypneæ des- cribed on page 51 of this volume is found upon this plant in whose thick cuticula its basal part is immersed. This species has been found a few times in sheltered places in shallow water. St. Thomas: in the harbour of Charlotte Amalia; St. Croix: near Christianssted. Ørsted has gathered it as St. Thomas. Geogr. Distrib.: West Indies, Guinea, Japan etc Fig. 368. Hypnea cornuta (Lamour.) J. Ag. Transverse section of the thallus. (About 100:1). 3. Hypnea cervicornis J. Ag. J. Agardh, Spec. Alg., vol. II, p. 451; Epicrisis, p. 546. Hypnea spinella Kütz., Tab. Phycolog., vol. 18, tab. 26. The specimens referred to this species form roundish bushes composed of numerous, much branched filaments. No main bran- ches are present, all the branches being of nearly the same size and mostly rather thin. The ramification is very irregular, the branchlets longer or shorter with acute apices. Frequently the upper ends of the filaments get an antler-like appearance being often curved and their branchlets decreasing in length towards the top. Some of my specimens might perhaps quite as well be re- ferred to Hypnea divaricata Grev. of whi
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