. An introduction to the study of seaweeds. Algae. 56 SEAWEEDS CUTLEEIACE^ General Characters.—The reproductive organs of the Cutleriacccc are not borne in conceptacles as in the Fucacccv, but occur in clus- ters or sori among para- physes on the outer surface of the plant. The oos- pheres are ciliated like the antherozoids, which they greatly surpass in size. Fertilisation is not effect- ed until the oosphere has come to rest. There is also reproduction by non- sexual zoospores, interme- diate in size between oos- pheres and antherozoids, and produced in unilocular zoosporangia, also super- f
. An introduction to the study of seaweeds. Algae. 56 SEAWEEDS CUTLEEIACE^ General Characters.—The reproductive organs of the Cutleriacccc are not borne in conceptacles as in the Fucacccv, but occur in clus- ters or sori among para- physes on the outer surface of the plant. The oos- pheres are ciliated like the antherozoids, which they greatly surpass in size. Fertilisation is not effect- ed until the oosphere has come to rest. There is also reproduction by non- sexual zoospores, interme- diate in size between oos- pheres and antherozoids, and produced in unilocular zoosporangia, also super- ficial in situation. The growth of the thallus is trichothallic, and in Zart- ardinia the old fronds give rise vegetatively to new individuals by tricho- thallic gemmae. The order is a small one, consisting of the genera Cutleria (including Aglaozonia) and Zanardinia. The Thallus in both genera (exclusive of the non- sexual generation of Cutleria = Aglaozonia) is of. Fig. S.—Cutleria muWjida. n, female sorus; 6, male ditto highly 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 Murray, George Robert Milne, 1858-1911. London, New York, Macmillan
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