CYLINDROTHECIUM. 389 



A plant of a very distinct habit, somewhat resembling Porotrichum alopecurum 

 in habit and manner of growth, but still more dendroid in appearance owing to the 

 shorter, straighten, more compactly tufted branches ; the areolation is however quite 

 different. The fruit when it occurs is produced in abundance, and the plant is then a 

 very fine and beautiful one. 



102. CYLINDROTHECIUM B. & S. 



Primary stems hardly distinct, secondary erect or depressed, 

 more or less pinnately branched. Leaves ovate or lanceolate, 

 nerveless or with two short nerves. Capsule erect, symmetrical , 

 oblong or cylindric ; lid conical. Inner peristome without a basal 

 membrane , processes nearly or quite as long as the outer teeth ; 

 cilia none. 



1. Cylindrothecium concinnum Schp. (Hypnum concinnum 

 De Not.; Entodon orthocarpus Lindb.) (Tab. LI. H.). 



In large loose tufts, yellowish or brownish green, 2-5 inches 

 high ; erect or somewhat depressed ; closely resembling Hypnum 

 Schreberi. Stems pale or brown (not red as in that plant) ; 

 branches more or less regularly pinnflte, crowded, rather short, 

 ierete with the closely imbricated leaves, cuspidate. Leaves 

 widely ovate-oblong, when dry erect and closely imbricated, 

 slightly more spreading when moist, concave, glossy, obtuse or 

 minutely pointed, entire, margin recurved at base, involute and 

 «ub-cucullate at apex ; nerveless or with 2-3 faint traces of 

 nerves at the base ; cells narrowly linear-vermicular , long, at 

 apex shorter, wider, oval, at base somewhat laxer, at basal angles 

 quadrate, thin-walled, forming rather large triangular bands. 

 Capsule cylindric, lid conical, apiculate ; peristome reddish. 

 Dioicous. 



Hab. Among grass etc. , on calcareous soil, not common. Fruit very rare, not 

 found in Britain, late summer and autumn. 



Very similar in appearance to Hypnum Schreberi, though quite different in the 

 fruit. It may be known from that species by the pale or brown, not red stems, and 

 by the basal angular cells which are less distinct, not hyaline nor orange, and not 

 forming such distinct auricles. It is as a rule, also, a more compact plant, with the 

 branches shorter and, while cuspidate, less attenuated, but the latter characters are 

 not quite constant. H. cuspidatum is also like it, but is taller, more slender and 

 elongated, with the basal auricles much more distinct, and is usually of a bright green 

 •or bright golden brown. 



103. MYURIUM Schp.. 



Stems irregularly branched ; branches julaceous with the very 

 concave, closely imbricated leaves, tumid. Leaves cochleariform, 



