8 Dansk Botanisk Arkiv, Bd. 2. Nr. 1. 



In the specimens from the last named locality the tumours were 

 found to be now cylindrical, entire, now more or less palmate. 

 Spores spherical, pale yellowish-chestnut according to the advancing 

 maturity, as a rule 20 p. across, many lesser, some bigger, some 

 others gigantic, until 45 p across, the wall then being exceedingly 

 thickened (fig. 1, i). The shape of the membrane is very varying. 

 In some cases the membrane is entirely smooth and then com- 

 monly being very thickened, often about 10//, surpassing the dia- 

 meter of the lumen. The membrane of the above mentioned gigant- 

 like spore was about 18 p thick. In other cases the spores are 

 provided with very long (about bp), obtuse or flattened warts 

 being irregularly distributed on the surface of the membrane, 

 putting in mind the sculpture of the E. C as pary ana-spore (fig. 1, m 

 and fig. 8). Finally some spores are more regularly and lower 

 warted (fig. 1, I). On studying more thoroughly the material, one 

 often finds two or more spores connected with each other in a 

 Puccinia- or Triphragmium-\ike complex (fig. 1, / — h) or seldom in 

 a row composed of some few spores. Often we have seen channels 

 going through the thickened walls. 



Entorrhiza Raunkiæriana Ferd. et Wge. sp. n. 



Mycocecidiis ex apicibus radicum tenuium tumefactis oriundis, 

 oblongo-citriformibus vel ovoideis, formam siliquae Crambes mari- 

 timae L. saepe aemulantibus, maximis 3 mm latis, albo-flavidis. 

 Sporis in hyphis hyalinis, diu persistentibus acrogenis, + protracte 

 ellipsoideis, citriformibus, plerumque 18 — 21 p long. ^ 9 — 11 p lat., 

 nonnullis usque ad 30 p elongatis, hyalino-flavidulis, plasmate 

 denso, nonnumquam vacuolato farctis, episporio lineolis spiralibus, 

 circ. 2p inter se distantibus, dextrorsum oblique ascendentibus 

 ornato suffultis. 



In radicibus Scirpi fluitantis L., in stagno dunensi Grøndal 

 dicto insulae Danicae Fanø submersi, mense Octobri. (Leg. 

 C. Raunkiær). 



This fungus, which by J. Lind (1. c. p. 271) is identified 

 with E. scirpicola (Correns) Sacc. et Syd., was already found in 

 the year 1896 by prof. C. Raunkiær in a little dune-lake, Grøndal, 

 on the island of Fanø, and was refound Septbr. 1911 and Oct. 

 1912 in the same locality. A great many roots of Scirpus fluitans 

 submerged outside the Agrostis carcma-community were infested 

 by the fungus. — Spores collected in Oct. were wintered at a low 

 room temperature, apparently without changing their aspect. As 



