HEPATIC^E. (LIVERWORTS.) 701 



33. PTILIDIUM, Nees. Fringed Scale-Moss. (Tab. 22.) 



Fructification terminal on short branches. Involucral leaves 2-4, four-cleft. 

 Perianth terete, obovate ; the mouth connivent, plaited, denticulate. Calyptra 

 pear-shaped, coriaceous. Capsule ovate. Elaters with two spiral fibres. In- 

 florescence dioecious. Antheridia covered by closely imbricated perigonial 

 leaves. Stem-leaves complicate-2-lobed, each lobe divided. Amphigastria 4- 

 5-lobed. (Name a diminutive of tttiKov, a downy feather ; from the cut-fringed 

 foliage.) 



1. P. Clliare, Nees. Stems crowded, somewhat pinnate ; leaves (4-cleft) 

 and amphigastria both lacerately ciliate, the fringe long and setaceous. — Rotten 

 logs, in woods. (Tab. 22.) (Eu.) 



34. SENDTNERA, Endl. (Tab. 22.) 



Fructification terminal. Involucral leaves numerous, incised, free or connate 

 at the base. Perianth tubular, deeply many-cleft. Calyptra chartaccous. Cap- 

 sule globular. Elaters free, with two spiral fibres. Antheridia upon proper 

 branches in the axils of ventricose perigonial leaves. Stem-leaves 2 - 5-cleft or 

 entire. Amphigastria 2 - many-cleft. (Named for 0. Sendtner, a German bot- 

 anist.) 



1. S. juniperilia, Nees. Stems erect, nearly simple, slender, elongated ; 

 leaves and amphigastria almost alike, oblong, curved and one-sided, 2-clcft to 

 the middle, the lobes lanceolate. — High mountains. — Plant rigid, reddish- 

 brown. (Tab. 22.) (Eu.) 



35. TRICHOCOEEA,Nces. Downy Scale-Moss. (Tab.VHI.) 



Fructification situated in a fork. Involucral leaves numerous, coaiescent into 

 an oblong and truncate coriaceous hairy tube, concrete with the calyptra. Peri- 

 anth none. Capsule oblong. Elaters with two spiral fibres, free. Antheridia 

 on the upper side of the stem in the axil of leaves. Leaves palmately divided ; 

 the divisions laciniate. Amphigastria present. (Name composed of 6pi^, hair, 

 and KoXeus, a sheath; from the hairy involucre.) 



1. T. Tomentella, Nees. Stems forked, 2-3-pinnately branched; 

 divisions of the 4-5-dividcd leaves capillary -many-cleft ; amphigastria seta- 

 ceously many-cleft. — Moist places, in large patches. — Foliage pale green, soft- 

 hairy. (Tab. 22.) (Eu.) 



36. RIASTIGOBBYUM, Nees. Great Scale-Moss. 



(Tab. 22.) 



Fructification terminal, on short proper branches, arising from the axils of the 

 amphigastria. Involucral leaves small, narrow, acutely incised at the apex. 

 Perianth elongated, 3-angular, the mouth 3-toothed. Calyptra membranaceous. 

 Capsule globose. Elaters with two spiral fibres. Antheridia on short branches 

 from the axils of the amphigastria, two in the axil of each perigonial leaf. Stem- 



59* 



