HepativcB of North America. 40 



elevated. (Tar<iioni(i orhirithiris Schwein., Carpoholns orJiicii- 

 hiris Schwein., Carpoliimm orbicidare Nees., Anthoceros orbicu- 

 laris Aiist. Includes X. ralvata Sulliv.) 



Hah. — Can. to Gulf of Mexico. 



^i6.— Syn. 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. Tliallus sinall, depressed or 

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

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

 No. 1. {Anthoceros tiielanosporus xA.ust. ) 



Hah. — Moist ground, O- [Sulliv). 



5/6.— Mem. Amer. Acad. n. ser. Ill, p. 65 ; Torrey Bull. VI, 29. 



Exsic. — Muse Alleghan. No. 290; Hep. Bor.-Amer. No. 125. 



Ordeb IV. JUNGERMANIACE.E Dumort. 



Terrestrial or rarely somewhat aquatic, chiefly perennial 

 plants with either thallose or foliaceous vegetation. Capsule 

 home 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 

 (a)H]jhi(jastria) 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-foliaceous; the lobes of the thallus 

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

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

 dulate mouth. VI. FOSSOMBRONIA. 



[^ Vegetation foliaceous F 



* Sec }i1so Appendix C for another synoptic table. 

 4 



