117 



"A rather larger plant," adds Mr. Boswell, "than I. 

 tenerum (Hypnum), Swartz, from the West Indies, the leaves 

 rather wider, long and slenderly acuminate. Colour bright 

 glossy-green and straw-yellow. The opercula have vanished ; 

 the peristome seems normal." 



Sphagnum serrulatum, Warnst. Hedwigia 1893 Tab. I. f. 

 la — lg. (Proc. Eoy. Soc. Tasm. 1893, p. 204, name only). 



Plant 'robust, dark-green (always ?), floating in water, 

 resembling a strong Sph. cuspidatum, Ehrh., especially the 

 variety plumosum, Nees. 



Stem leaves large, isosceles-triangular, 1-37 — 1'50 mm. long, 

 and at the base averaging 1-14 mm. wide, with a narrow- 

 rounded or truncate, toothed apex; both kinds of cells in the 

 middle and lower parts, the hyaline narrow and tube-shaped, 

 without fibres or pores, the apical cells usually only ehloro- 

 phyllose, the marginal gradually narrower, and forming an 

 unmarked-off border of equal width. 



Branches usually four in a fascicle, two long, strong, pointed, 

 loosely leaved, and two somewhat weaker, rigid. Leaves of 

 the former very large, long, narrow lanceolate, 5 — 5T4 mm. 

 long, and at the base 1*14 mm. wide, running out to a narrow, 

 truncate, coarsely-toothed apex, the margins from below the 

 middle upwards, especially towards the apex, almost spinosely 

 toothed, not rolled up when dry, undulate, somewhat shining; 

 hyaline cells absent, only thin-walled trapezoid or nearly 

 quadrate green cells, full of chlorophyll granules, gradually 

 narrower towards the margin until they form an unmarked- 

 off border, of course without fibres or pores. 



Bah.— In ditch, Zeehan Eailway,West Coast, 1891, W.A.W.,. 

 No. 622. 



" This," says Mr. Warnstorf, " is a remarkable species of 

 the cuspidate group, and is distinguished from all others 

 known to me by the presence in the brat c'l leaves of none 

 but chlorophyllose cells, all trace of fibres or pores therefore 

 being absent. With forms of Sph. cuspidatum living in water 

 exclusively it frequently happens that the hyaline cells recede 

 in favour of the green cells, but that they should be wholly 

 wanting is probably a new biological phenomenon with 

 Sphagna. Another peculiarity is that the borders of both 

 stem and branch leaves are not marked off from the other cell 

 structure." 



Sphagnum pseudo-rvfeszens, Warnst., Hedwigia 1893, 

 Tab. II. f . 5a— 51. (Proc. Eoy. Soc. Tasm., 1893, p. 204,. 

 name only.) 



Plant scarce'/ distinguishable in habit from a densely 

 branched Sph. rufescens with reddish-brown comae. 



