. Botanisk tidsskrift. Botany; Plants; Plants. - 342 — I have referred to this species some plants, I met with in NW. Ice- land growing* at high-water mark in company with Ulothrix consociata and Urospora mirabilis. My plants attain a length of about 1 mm., the head is usually shorter than the stipe, sometimes longer or sometimes of about the same length as the stipe as shown by the following measurements. The stalk The head Thickness Length Thickness Length above below above below 16 fi 9/4 174 p. 36 ß 26 ,u 224 ß 29 - 14 - 464 - 36 - 29 - 333 - 23 - 14 - 600 - 29 - 23 - 326 -. The head is us
. Botanisk tidsskrift. Botany; Plants; Plants. - 342 — I have referred to this species some plants, I met with in NW. Ice- land growing* at high-water mark in company with Ulothrix consociata and Urospora mirabilis. My plants attain a length of about 1 mm., the head is usually shorter than the stipe, sometimes longer or sometimes of about the same length as the stipe as shown by the following measurements. The stalk The head Thickness Length Thickness Length above below above below 16 fi 9/4 174 p. 36 ß 26 ,u 224 ß 29 - 14 - 464 - 36 - 29 - 333 - 23 - 14 - 600 - 29 - 23 - 326 -. The head is usually nearly cylindric and merges also usually insen- sibly into the stalk, but still I have seen some few plants having the head indistinctly separated from the stalk by a constriction. The chromatophore is of the same shape and structure as in G. gregarium and contains numerous pyrenoids. The thick- ness of the membrane, measured in the upper part of the head, is 3 ji, and both the stalk and the membrane of the head are of the same structure as in G. gregarium and consist also of pectose. Among my material, which was gathered in the beginning of September, I found some fructiferous specimens. The spores are ovate or oblong-ovate and are furnished with a tail resembling that of the spores of Urospora, they have, as far as I can see in my alcohol material, two cilia in the broader end, and are 4 — 6 fi broad and 14 fi long. NW. Icel. Kolbeinsa. Fam. Ulvaceæ. Percursaria percursa (Ag.) K. Rosenv. Grl. Havalg. p. 963. I have met with this species growing in company with Rhizoclonium in pools at or a little above high-water mark. Fructiferous specimens have been gathered in July. The frond of my specimens consists for the most part of two rows of cells, but I have not seldom met with plants, which were partly composed of one cellrow. The filaments are 26 p. broad and about 14 fi thick. The cells are usually rectangular, somewhat Fig. 3. Cocliolum pusillum (Lyngb.). To the l
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Keywords: ., bookcentury1800, bookdecade, booksubjectbotany, booksubjectplants
