. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 43. Acro- chætium occi- dentale nov. spec. Branch with sporan- gia, the upper- most divided into two spo- res. (About 400: 1). (Vickers) is the same as this species. But the descrip- tion of M^i^ Vickers is so defective that any identifica- tion by help of it is impossible and as: "Les échan- tillons, mal conserves, ne se pretent pas bien å rétude", any help from the original material seems also excluded. The bases of the two plants in question are apparently alike and they are both living upon Liagora. Bornet and M^^^ Vickers r
. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 43. Acro- chætium occi- dentale nov. spec. Branch with sporan- gia, the upper- most divided into two spo- res. (About 400: 1). (Vickers) is the same as this species. But the descrip- tion of M^i^ Vickers is so defective that any identifica- tion by help of it is impossible and as: "Les échan- tillons, mal conserves, ne se pretent pas bien å rétude", any help from the original material seems also excluded. The bases of the two plants in question are apparently alike and they are both living upon Liagora. Bornet and M^^^ Vickers refer the plant to Chantransia which suggests that the plant from Barbados had sexual organs; these I have never found in my plant. As to the arrangement of the monospores of Acr. Barbadense, their form and size nothing is said just as no description is given of the sexual organs. St. Croix: Long Point. 15. Acrochætium comptum nov. spec. Thallus usque ad 1 mm altus et ultra, e filis erectis ramosis sporangiferis et fills endophyticis compositus. Spora in filamentis assimilatoricis hos- pitis germinans, magna, oblonga, in cellu- las duas divisa est; e cellula inferiori fila decumbentia circa filamenta hospitis repentia, e cellula superiori filum singulum erectum gignitur. Filum erectum inferne nudum, superne ramosum ramis vicissim plus minus ramo- sis ramos seriates gerentibus instructum. Cellulæ cylindricæ 8—11 fi latæ, ca. 35 ju longæ, chromatophoro parietale pyre- noide laterali instructæ. Sporangia monospora, plerumque ses- silia, nonnumquam in ramuhs unicellu- laribus posita, singula vel bina, in parte basali ramorum uniseriata, ovata, 11—14/i lata et ISn longa. This species is characterized by the ^ig. 44. Acrochætium „ , j^, ^ j^i . ,. •,•'•,! compzum nov. spec. Basal iact that the germmatmg spore is divided part of a plant showing by a transverse wall into two cells from the original spore divided .1 i> 1 • 1 J m . into two cells. (About the up
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