28 ON THE OCCURRENCE OF DICRANUM FLAGELLARE. 



tte axils of the leaves. The leaves of these shoots are minute, 

 lanceolate, obtuse, entire, and have a scarcely perceptible nerve 

 when very young. These flagellar are said by Bruch and Schimper 

 to appear during the period of inflorescence and to fall during the 

 formation of the fruit, to be not always present, nor equally numer- 

 ous in all tufts. 



From the nearly allied D. montanum and D. Scottianum our plant 

 may be thus distinguished. D. montanum has more slender stems, 

 the leaves are narrower, distinctly curled when dry, so as to re- 

 semble a Weissia rather than a Dicranum, strongly serrate at the 

 apex and back of the nerve, and serrulate almost to the base of the 

 leaf, the back of the leaf is distinctly papillose, the margin straight 

 and erect, not incurved, so that the leaf does not form a subulate 

 tube. The alar cells consist of five rows with generally only one 

 row of narrower cells at the mai'gin of the leaf. The width of the 

 lamina at the base of the leaf is from one and a half to twice that 

 of the nerve. 



D. Scottianum may be distinguished in the dry state by the erect 

 leaves which do not form comal tufts, but are densely imbricated 

 throughout the whole length of the stem. The leaves are longer, 

 more tapering, have often an excurrent nerve, and are never x)er~ 

 ceptibly seri^ate, the margins are not connivant but readily flatten 

 out under the microscope, the cells have thicker walls, and are 

 narroioer than in D.flagelhu-e, the alar cells do not extend to the 

 nerve, but consist of about six rows of enlarged quadrate cells, with 

 from three to five rows of narrower cells intervening between them 

 and the nerve. The nerve is narrower and thicker than in D.fla- 

 gellare. The habitat is also different, D. Scottianum growing in 

 well-defined, rounded tufts on rocks, while D. flagellare grows in 

 irregular spreading patches, on decaying stumps of trees. — Journal 

 of Botany, July, 1874. 



ICONES SELECTS HYMENOMYCETUM HUNGARI^. 



By Charles Kalkbrenner. 



In Vol. i.. No. 13, 1873, of this valuable periodical, I have 

 directed the attention of those interested in Cryptogamic Botany to 

 the above-mentioned interesting work published by the Hungarian 

 Academy ; of this the second pai-t has just been published by the 

 " Athen£eum " Publishing Society in Pest. This part contains 29 

 species of Agaricus ; amongst these six new species of Schulzer — 

 A. drepanophyllus, nigrocinnamomeus, dulcidulus, hcemori'hoidarius, 

 thraustus, mamillatus ; nine species of Kalkbrenner — A. plebejus, 

 piceus, punctulatiis, illnstris, paradoxus, helobeiis, atrovirens, lucorum, 

 capreolarius ; and fourteen old species, mostly of Fries — A. cameo- 



