MOSSES WITH A HAND-LENS 



179 



asplenoides. 



but perianths can be found in autumn. 

 The "perianth is oblong, narrowed at 

 base, flattened." Common on moist 

 soil and stones in woods, particularly- 

 near brooks, strongly resembling some 

 of the creeping stems of some species 

 of Mnium. 



There is a form of this species 

 rather common in drier places that has 

 the leaves nearly entire and has passed 

 as a different species under the name 

 of P. porelloides. This is now con- 

 End "oT*bra'n'ch sidered but a form of P. asplenoides, 



Plagiochila 



?K? uTdSe of braS which, varies greatly and will be col- 

 >< 4- lected for something else several times 



before the student gets to know it thoroughly. 



GEOCALYX. 



G. GRAVEOLENS (Schrad.) Nees. is our only species. It gets 

 its specific name from the fact that it has an underground in- 

 volucre much like that of Kantia, which it somewhat resembles 

 in habit and gross appearance, but its leaves are subrectangular 

 and very deeply two-toothed at the 

 ends as shown in the figure. The 

 underleaves are present, but so small 

 as to be made out with difficulty wiih 

 a lens. The spores are ripe in May, 

 but the perianths are present in sum- 

 mer. 



Figure iio. Geocaly.v 

 graveolens: plant natural 

 size; two pairs of leaves 

 with under leaves; part of 

 stem with an underleaf; sec- 

 tion of Involucre showing 

 caljrptra and base of pedicel; 

 dehiscent capsule, elaters and 

 spores. (After SulHvant.) 



LOPHOCOLEA. 



The Lophocoleas are very similar 

 in habit and size to Geocalyx, but 

 their underleaves are larger and the 

 perianths are borne on the end of 

 a stem or primary branch. The leafy 

 stems in the species treated are 

 about tV of an inch wide in both 

 genera. 



