. Botanisk tidsskrift. Botany; Plants; Plants. — 370 — Some specimens have been collected by Lundbeck at Önundarfjöröur in a depth of about 12—14 fathoms, but I doubt that the plants have been growing at that depth. Smaller specimens, more richly furnished with rhizoids, occur in the lower litoral region and form the transition to the next form. f. littoralis nov. f. The specimens which I have referred to this form are 6 —14 cm. high. The main branches are about 100// thick below and 200 — 240^ thick above. The sporangia occur singly or two or three in a row; their length is varying and they a
. Botanisk tidsskrift. Botany; Plants; Plants. — 370 — Some specimens have been collected by Lundbeck at Önundarfjöröur in a depth of about 12—14 fathoms, but I doubt that the plants have been growing at that depth. Smaller specimens, more richly furnished with rhizoids, occur in the lower litoral region and form the transition to the next form. f. littoralis nov. f. The specimens which I have referred to this form are 6 —14 cm. high. The main branches are about 100// thick below and 200 — 240^ thick above. The sporangia occur singly or two or three in a row; their length is varying and they are sometimes twice as broad as long and in other cases twice as long as broad. The chromatophores of the younge. Fig. 14. Acrosiphonia hystrix (Strömf.) f. littoralis. a and c show the size of the meshes in younger cells, b in older cells. cells is finely reticulated, while the older or longer cells have chromato- phores with large meshes somewhat reminding of A. centralis Kjellm. This form differs from the typical form by narrower branches, more richly occurring rhizoids and more dense growth. Fructiferous specimens have been gathered in April —August. This form in many respects highly resembles A. flaccida Kjellm. (Acrosiphonia p. 65, Tab. Ill, fig. 1—14). My plants occurred for the most part in pools in the litoral region, but some of them have been picked up from a depth of 2 —3 fathoms. A specimen collected by Strömfeit at Seley in E. Icel. in a depth of 3 — 5 fathoms and by him referred to Gladophora diffusa seems to belong- to this form, but it differs from my specimens by having the upper branches incurved and slightly tapering towards the apex. The thickness of the main branches is about 160 — 210^. Regarding the incurved. 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 Bota
Size: 2161px × 1157px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
