Ilcpaficd' of Noiili A»i('r/n(. 45 



tinct. Thullus dark green or blackish, usually depressed, vari- 

 ously lobed and divided. Texture lax, vesieulose, with large 

 chlorophyll grains, frequently glandularly thickened at the 

 apex or in streaks along the middle so as to appear nerved. 

 Name from (iiifliox, flower, and kcras. horn, from the appear- 

 ance of the fructification. 



* Spores i/el/oir; r/ofrrs i/rlloir or irif/i a i/c/loiris/i fiiif/c 

 f T/kiI/hS USIKflllJ siiioofJi. 



1. A. laevis Ji. Thallus smooth, nearly plane above: 

 involucre 2 — 4 mm. high, trumpet-shaped when dry, the mouth 

 repand-toothed, often thickened, rarely scarious; capsule pale 

 brown or yellowish. 2.5 — 3.8 cm. high, the valves often twisted 

 when dry; s])ores rather small, nearly smooth, flattish, angular; 

 elaters rather short, geniculate, somewhat articulated, yellowish. 



Var. major Aust. Larger in all its parts except the spores 

 and elaters. {A. (.\troJi)iianiis Michx.. A. hiriuidfiis Schwein. ) 



Hah. — Can. to the Gulf of Mexico and Cal.; the var. southward and 

 in Cal. (Eu.) 



5*.— Syn. Hep. p. 586; Hep. Europ. p. 160; Torrey Bull. VI, 25. 

 DeZm.— Sulliv. ]Mosses U. S. t. VI. 

 jEjsic— Hep. Bor.-Amer. No. 123, 123b. 



2. A. Donnellii Aust. Dioecious; thallus ])lane, rather 

 narrow, smooth, very distinctly wide-nerved, deeply laciniate, 

 somewhate erenate, copiously tuberous below; involucre large, 

 funnel form, the mouth incised; capsule yellow; spores and 

 elaters as in No. 1. 



Hah. — Banks of Caloosahatchee R., Southwest Fla. (Amfin); rare. 

 5(6.— Torrey Bull. VI, 304. 



3. A. Mohrii Aust. Thallus thick, opaque, subcristate, 

 lacunose, densely radiculose beneath, nerveless, tuber-bearing 

 within; involucre short, thickened, the mouth truncate, indis- 

 tinctly many erenate, often scarious-margined; capsule thick, 

 rigid, yellowish-brown or blackish, variously curved and twist- 

 ed, rather longpedicelled; spores ochreous, numerous, minutely 

 ])apillose, opaque or somewhat pellucid; elaters various, some 

 long and some short. 



//r(6.— Port Royal, S. C. (Aii.^tin), Mobile, Ala. (Mohr). 

 Bib.-Torrey Bull. VI, 304. 



i't Thdlhis more or /ess t//(ni(lii/(tr. 



