Hepattccv of North America. 59 



4. M. conjugata Lindb. Monoecious; thallus 3.5 cm. 

 long, 1 2 mm. wide, commonly dichotomous ; the branches 

 short, linear, narrower in some parts, convex above, the mar- 

 gins more or less distinctly undulate, the midribs and margins 

 pilose with rather long, straight, divaricate hairs; the hairs 

 usually double and very frequently with sucker-like branches 

 at their extremities; midribs covered above with two, below 

 with 3-6 rows of enlarged lax cells. (Echimgyna furcata, 

 Dumort., Metzgeria furcata Dumort. in part.) 



Hob. On shaded siliceous rocks and trunks of living trees, etc- 

 Catskill Mts., N. Y. (P. T. Cleve), Gal.? (Bolander}. (Eu.) 



Bib. Lindb. Monog. Metzg. n. 8, f. 6; Hep. Europ. p. 139 (sub. M. 

 furcata). 



Delin. Brit. Jung. t. 56, f. 2 ; Ekart, t. I, f. 1. 



Exsic. Hep. Bor.-Amer. No. 117. 



VI. FOSSOMBRONIA RADDI. 



Involucral leaves 5-6, minute, subulate, coherent with the 

 perianth almost its entire length. Inner involucre terminal or 

 by innovation dorsal on the main stem, subcampanulate, the 

 large mouth open, crenate-lobed. Calyptra pear-shaped, rup- 

 turing early. Capsule globose, irregularly 4-valved. Elaters 

 short, uni-trispiral. Androacium naked, borne on the back of 

 the stem. Vegetation pseudo-foliaceous, the lobes of the thal- 

 lus-like stem leaf-like, succubous, somawhat quadrate, 3-5 lobed, 

 flaccid. Named for Sig. Cav. Vittorio Fossombroni, an Italian 

 minister of state. 



* Leaves mostly horizontal. 

 f Plant medium size or large. 



1. F. pusilla Nees. Plant small; stems 1.3 2.1 cm. 

 long, usually subsimple yet forked-divergent or subdichotomous 

 at the apex; leaves obliquely spreading, the lower undulate- 

 lobed, the lobes barely mucronate, the upper angular, 3-4 lobed, 

 crisped, the lobes narrower; inner involucre obconic, dentate; 

 crests of the spores angular, subparallel. (Junger mania pu- 

 silla L.) 



Hob. On damp ground, mostly in unfrequented paths. (Eu.) 



Bib Syn. Hep. p. 467 ; Hep. Europ. p. 14. 



Delin. Brit. Jung. t. 69; Ekart t. V, f. 38; Sulliv. Mosses U. S. t. 

 VII. 



Eqsic. Hep. Bor.-Amer. No. 120. 



