Meyen's Report for 1 839 ow Physiological Botany. 403 



spores are developed in fours, and only by way of exception 

 in twos, threes and sixes ; and the Monosporidei, where the 

 long bent spores are always developed singly on spike-formed 

 supports : the genus Enidia belongs to this group. 



Interesting is the information that many tuberose Fungi, 

 as, for instance, the genera Gauteria, Vallad., Hydnangium, 

 Wallr., and Hymenangium, Kl. [Tuber album, Bull.), belong 

 to the true Hymenomycetm, and indeed to the ExosporcB ; in 

 these Fungi the hymenium covers the surface of the cavities 

 which are found in their fleshy substance. 



In describing the Moschella esculenta, M. Klotzsch calls 

 the paraphyses of authors anthers ; and of Sphcerosoma 

 [fuscescens) he says, that the anthers, when they appear in the 

 Octosporidei, always project above the surface of the tube- 

 skin (Schlauchkant), and therefore he does not reckon the 

 paraphyses of Sphcsrosoma fuscescens (plate 464) as an- 

 thers, inasmuch as they do not project above the surface. 

 I must here call to mind Carus's notice of a difference of 

 gender in Pyronema Marianum, where the yellow colour of 

 the whole surface of the fungus is derived from the con- 

 tents of the paraphysae, or anther-like organs. 



Dr. Redmann Coxe has sent to the Linnaean Society his 

 ^ Observations on some Fungi or Agarici*,^ which by deli- 

 quescence forms an inky fluid, drying into a bistre- coloured 

 mass, capable of being used as a water-colour for drawings, 

 and of a very indestructible nature, by means of common 

 agencies. 



M. Morren f has communicated some observations on the 

 structure and colouring of Agaricus epixylon, DeC. As re- 

 gards the colour, he says that the colouring substance is 

 formed quite differently in Fungi to what it is in other 

 plants ; in the above-mentioned Agaricus the blue colour of 

 the pileus is produced by a few spherical globules contained 

 in the tubes of the tissue. These globules are not changed 

 by iodine. In the deeper-seated layers of cells the globules 

 are less numerous, and in the tubes of the white flesh of the 

 mushroom they are not to be found. The tissue of the above- 

 mentioned fungus is said to consist solely of anastomosing 

 vessels, which have sometimes nodular sweUings, and are ge- 

 nerally forked, but seldom triramified : these vessels are long, 

 cylindrical, anastomosing tubes ; they contain a fluid and 

 globules, and have here and there partitions. The tubes are 

 of great length, and form a woolly tissue, and cannot there- 



* Annals of Natural History, June 1839, p. 258. 



f Notice sur I'histologie de I'Agaricus epixylon. Bulletin de I'Acad^mie 

 Royale de Bruxelles, vi. No. 1. 



2D2 



