i82 Transactions British Mycological Society. 



of the plant is determined by the nature of the surrounding 

 vegetation and conditions of exposure. In long damp grass 

 it grows loosely and is frequently four inches in height, whereas 

 in shorter grass and more open surroundings it is shorter and 

 more compact; whilst on exposed hills and downs the dwarf 

 form, var, pratensis, is produced. The latter is a very common 

 plant, and may occasionally be found in vast quantities. 



C. corniculata was formerly known in all British works as 

 C. 7nuscoides. The change in name is necessitated by the 

 International Rules of Nomenclature. It was agreed that the 

 starting-point for the nomenclature of the Hymenomycetes 

 should be Fries' Systema Mycologicum, 1821-1832, and as 

 Fries there adopts the names C. corniculata and C. pratensis 

 these stand, in spite of the fact that he later changed his mind 

 and adopted the Linnaean names C. muscoides and C.fastigiata. 



C. CORNICULATA Fr. var. pratensis Cotton et Wakef. 



Clavaria pratensis Fr., Syst. Myc. i. p. 471; Pers., Comment, 

 p. 51; C.fastigiata Linn., Spec. Plant., 1753, p. 118; Ramaria 

 fastigiata Holmsk., Beata ruris, 1790, p. 90; Clavaria muscoides 

 \d.r. fasti giata Cotton, in Trans. Brit. Myc. Soc. iii. 1909, p. 181. 



Illustrations: Bolton, Hist. Fung. tab. 112, fig. 2 (poor); 

 Bull., Champ. Fr. tab. 358, figs. D, E; Holmsk., Fung. Dan. i. 

 tab. 22; Flor. Dan. tab. 836, fig. 2; Pers., Comment, tab. 4, 



fig- 5- 



Plants tough, very much branched, branches crowded, of 



equal length and forming a level top. Colour the same as 



that of the typical form. 



Habitat. In short grass in exposed situations. 



This plant was formerly known as C. muscoides va.Y. fastigiata 

 ( = C. fastigiata L.). For remarks as to habitat, etc., see notes 

 under typical form. 



[e) Plants pale umber. 



16. C. UMBRINELLA Sacc, Syll. vi. 1888, p. 695; Cotton in 

 Trans. Brit. Myc. Soc. iii. 1909, p. 181. 



C. mnbrina Berk., Outlines, i860, p. 279. 



Illustrations: Berk., loc, cit. tab. 18, fig. 4 (very poor); 

 Cotton, loc. cit. tab. 11, fig. E (spores). 



Plants slightly branched, small, 2-2-5 cm. high, isolated or 

 caespitose, pale brown; smell none, taste pleasant. .Stem 

 sometimes thick and minutely velvety, but often absent, a 

 number of slender branches arising close together from the 

 base. Branching irregularly dichotomous, axils somewhat 

 flattened; branches slender, erect, cylindrical, 1-2 mm. thick, 



