Mosses and Lichens 



Spore-cases with lids 



H. Schreberi. 



Spore-case 

 without lid. 



The spore-cases are borne on variable pedicels; they are oblong 

 and incurved with convex-conical lids. An annulus is sometimes 

 present, and the teeth are as in the genus Hypnum. 



The Red-stemmed Feather-moss, Hypmim (Calliergon) 

 Schreberi, Willd. See Plate XXX. 



Habit and habitat. On 

 shaded ground of hills and 

 mountains. The specimen 

 photographed grew on the 

 dry knolls of a swamp in Lake 

 Placid. 



Name. The specific name 

 was given by Karl Ludwig 

 Willdenow in honour of 

 D. J. C. Schreber. 



Plant (gametopbyte}. Stems rigid, dark-red, branching, the 

 branches with somewhat regularly arranged branchlets; branches 

 and branchlets obtuse at the apex. 



Leaves. Pale-green or yellow, loosely overlapping, broadly 

 oval-oblong, slightly concave; apex obtuse or obtusely 

 pointed, incurved; base recurved on the borders; vein double, 

 short; margin entire; base extending down the stem; cells 

 narrow, four-sided, orange at the base and the basal angles. 



Leaves at tie base of the pedicel 

 (perichcetial leaves). The inner 

 sheathing, erect, not plaited; apex 

 short-pointed; vein none. 



Leaf -like organs among tbe leaves (para- 

 pbyllia). None. 



Habit of flowering. Male and female 

 flowers on separate plants (dioicous). 



Veil (calyptra). Thin, split up one 

 side. 



Spore-case. Oblong, dark-coloured, 



incurved. 



Pedicel (seta). -- Dark-red, long, 



twisted above. 



Lid (operculum). Red, conical, with a sharp point. 

 Annulus. None. 

 Teeth (peristome}. Long, with lamellae on the inside, inner 



306 



H. Schreberi. 

 Leaves at base of pedicel. 



