. Dansk botanisk arkiv. Plants; Plants -- Denmark. 468 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. being hut slightly narrowed or not at all; upwards the narrow- ing of the branches is, for the most part, slight and gradual until rather suddenly, near the summit, they start tapering rapidly into the acute apex. As described by Collins and Hervey the tetrasporangia are formed in the upper ends of the branches (Fig. 426 a); the fructiferous part is swol- . len being often about twice the breadth of the sterile, slender part. In several respects, for instance, as to its whole appearance, this plant shows
. Dansk botanisk arkiv. Plants; Plants -- Denmark. 468 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. being hut slightly narrowed or not at all; upwards the narrow- ing of the branches is, for the most part, slight and gradual until rather suddenly, near the summit, they start tapering rapidly into the acute apex. As described by Collins and Hervey the tetrasporangia are formed in the upper ends of the branches (Fig. 426 a); the fructiferous part is swol- . len being often about twice the breadth of the sterile, slender part. In several respects, for instance, as to its whole appearance, this plant shows great like- ness to the Laarencia chondrioides described by me, but on closer ex- amination several differ- ences will soon be obser- ved, for instance, the acute apex of the thallus, the pericentral cells easily seen through the cortical layer, the different shape of the branches especially the tetrasporic ones and the highly deviating transverse section. Found with tetraspores in the month of March. The specimens were gathered in the same locality as those formerly examined. St. Jan: off Cruz Bay. 120. Chondria atropurpurea Harv. 121. — littoralis Harv. 122. — dasyphylla (Woodw.) Ag. 123. Acanthophora spicifera (Vahl) Borgs. 124. — muscoides (L.) Bory. 125. Polysiphonia havanensis Fig. 426. Chondria polyrhiza Collins and Her- vey. a, part of thallus with a group of rhizoids and a tetrasporic branch, b, transverse section of the thallus. (a, about 17:1; b, about 60:1.) 126. 127. 128. 129. 130. spec. variegata. (Ag.) Zan. sphærocarpa Borgs. macrocarpa Harv. ferulacea Suhr, J. 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
Size: 1850px × 1350px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectio, bookdecade1910, booksubjectplants
