. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ ol' the Danish W. Indies. 397 The tetrasporangia are produced in the cortical layer and occur scattered over the whole thallus. They are about 20 fi broad and cruciately divided (Fig. 379). Kuckuck gives (1. c, p. 223) a transverse section of the wall with tetrasporangia. The cystocarps are likewise found scattered over the surface of the thallus; they are hemispherical pro- minent and have an apical porus. Tetrasporangia and cystocarps oc- curred in the month of March. At the islands this species has been found in dee
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ ol' the Danish W. Indies. 397 The tetrasporangia are produced in the cortical layer and occur scattered over the whole thallus. They are about 20 fi broad and cruciately divided (Fig. 379). Kuckuck gives (1. c, p. 223) a transverse section of the wall with tetrasporangia. The cystocarps are likewise found scattered over the surface of the thallus; they are hemispherical pro- minent and have an apical porus. Tetrasporangia and cystocarps oc- curred in the month of March. At the islands this species has been found in deep sea only (about 12—15 fathoms); according to Ber- THOLD*) and Kuckuck (1. c, p. 218 —19) it occurs too in shallow water in the Mediterranean Sea. But it is also found there in deeper water, and Rodriguez**) found it even at a depth of 130 m at the Baleares. St. Jan: In many places in the sound between this island and St. Tho- mas and in the sea to the north of St. Fig. 380. Chrysymenia Enteromorpha Harv. (about natural size). Geogr. Distrib. Mediterranean Sea, Morocco. 4. Chrysymenia Enteromorpha Harvey. Harvey, Nereis , Part II, p. 187. F. Børgesen, W. I. Florideæ, II, p. 185. J. Agardh, Epicrisis, p. 325. Of this fine plant (Fig. 380) I have found a few specimens in deep water. They reached a length of more than ten cms (in the biggest specimen collected the basal part was absent). As des- cribed by Harvey, the plant, to begin with, consists of a single sac- cate oblong frond, two—three cms. long which at its base tapers into a short stalk ending in a small disc, by means of which the plant is fastened to the substratum. From this primary sac similar, often narrower and longer, secondary sacs are issued in all direc- tions, and these are again ramified in the same way and so on *) Berthold, G., Über die Vertheilung der Algen in Golf von Neapel etc., p. 526. **) Rodriguez, J., Algas de las Baleares, p. Please note that these images are ex
Size: 1373px × 1820px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectio, bookdecade1910, booksubjectplants
