49° HYPNACE/E. 



consist so much in the upper cells being much wider in H. cordifolium, for although 

 larger generally they are not much wider in proportion to their length, though with 

 thinner, less firm walls, and less vermicular ; but in that species the areolation becomes 

 very wide and lax throughout the whole width of the leaf at some distance above the 

 base, passing very gradually into the large, hyaline, decurrent tissue, while in this the 

 cells, though wider and snorter towards base are much less markedly so, and pass 

 abruptly into the inflated, hyaline auricles. 



In one form of the present plant the stem-leaves, especially the upper ones, are 

 elongated and narrowly tapering, with the margins at point much enrolled when dry 

 so that they have a very tapering, pointed appearance. 



38. Hypnum sarmentosum Wahl. (Amblystegium sarmen- 



tosum De Not.) (Tab. LX. A.). 



Resembling H. cuspidatum in habit, but more slender, less 

 rigid, more distantly and irregularly, not pinnately branched, 

 and of a totally different colour, deep purplish crimson, sometimes 

 variegated with green and orange ; the branches frequently but 

 not at all regularly cuspidate with convolute leaves ; the leaves 

 less rigid, irregularly and loosely imbricated, often slightly 

 secund, when dry somewhat fiexuose, narrower, elliptic-lanceolate 

 or narrowly oblong, narrowed at base, rounded and cucullate at 

 apex, obtuse, or shortly apiculate, entire, nerved nearly to apex ; 

 cells narrow-linear, 10-15 times as long as wide, the walls 

 incrassate and porose, almost uniform to base ; at insertion wider, 

 shorter, sub-rectangular, very incrassate ; at angles suddenly 

 larger, the inner incrassate, orange-brown, the outer still larger, 

 thin-walled, hyaline or coloured ; forming well-defined, rather 

 large, hyaline or orange, decurrent auricles. Capsule rather 

 small. Dioicous. 



Hab. Mountain bogs and streams, not common. Fr. very rare, summer. 



Recognised at once by its colour and general habit, and not very variable. I 

 have seen no description of the var. sub-flavum Ferg. , but the specimens I have of 

 that variety appear to be characterised only by the pale, orange colour and the leaves 

 somewhat more widely spreading and flexuose when dry. 



39. Hypnum cuspidatum L. (Amblystegium cuspidatum 



De Not.) (Tab. LX. B.). 



Tall, moderately robust ; stems rigid, reddish brown, erect or 

 ascending, more or less regularly, but hardly complanately 

 pinnate, forming loose tufts of a bright or yellowish, glossy green. 

 Stems and branches at the tips terete and cuspidate with the 

 convolute apical leaves ; stem-leaves sheathing, with or without 

 the points spreading, or erecto-patent from the base, crowded, 

 scariose, \-\\ lines long, widely elliptic-oblong, broadest at the 



