of North Anu'i'ii'n. 49 



elevated. (Tiny'ion'm orliinilaris Schwein., 

 laris Schwein., Carjtoli/mm orbiculare Nees., Anthoceros orbictt- 

 is Aust. Includes N. valvata Sulliv.) 



Nab. Can. to Gulf of Mexico. 



Iiib.$yn. Hep. p. 591, 792; Mem. Amer. Acad. n. ser. Ill, p. 65; 

 Torrey Bull. VI, 27. 



Delin. Mem. Amer. Acad. n. ser. Ill, t. IV ; Sulliv. Mosses of U. S. 

 t. VI. 



Exsic. Muse. Alleghan. No. 289; Hep. Bor.-Amer. No. 124. 



2. N. melanospora Sulliv. Thallus small, depressed or 

 sometimes cgespitose, the texture lax; capsule much as in No. 

 1; spores dark fuscous, smooth, larger by half than those of 

 No. 1. (Anthoceros melanosporus Aust.) 



Hob. Moist ground, O. (Sulliv). 



Bib. Mem. Amer. Acad. n. ser. Ill, p. 65 ; Torrey Bull. VI, 29. 



Exsic. Muse. Alleghau. No. 290 ; Hep. Bor.-Amer. No. 125. 



ORDER IV. JUNGERMANIACE^B DUMOKT. 



Terrestrial or rarely somewhat aquatic, chiefly perennial 

 plants with either thallose or foliaceous vegetation. Capsule 

 borne on an elongate, cellular pedicel, dividing lengthwise into 

 four valves or quadridentate. Elaters present, uni-quadrispiral. 

 Thallus with or without a midrib. (Genera I VI.) Leaves 

 when distinct, 2-ranked, often with a third row of smaller ones 

 ((imphigastria) on the under side, incubous (Genera VII XI, 

 XIII XVIII) or succubous (Genera XII, XIX XXXII). 



The following artificial synopsis, tho imperfect, may assist 

 in determining species: 



ARTIFICIAL SYNOPSIS OF GENERA.* 



Vegetation thallose B 



Vegetation pseudo-f oliaceous ; the lobes of the thallus 

 leaf -like, succubous; inner involucre large, cam- 

 panulate, with a large, more or less lobed and un- 

 dulate mouth. VI. FOSSOMBRONIA. 



Vegetation foliaceous F 



" :: Seo :il.<<> Aj>]:cn<lix C for another synoptic t;iblc. 

 4 



