Hepaticce of North America. 47 



8. A. punctatus L. Thallus small, depressed, or often 

 caespitose and somewhat erect, lax, more or less glandular, often 

 falsely nerved; involucre rather short, oblong-linear, slightly 

 repand, sometimes scarious at the mouth; capsule 2.5 cm. high, 

 black; spores rather small, strongly muriculate, sharply angled; 

 elaters rather short and broad, flattish, geniculate, variously con- 

 torted, somewhat articulated. Of several forms varying more 

 or less from the type. Var. scariosus Aust. has the thallus 

 lamellate, the involucre lamellate and broadly scarious at the 

 mouth (A. scariosMS Aust.) — Var. Ohioueiisis Aust. ha^! the 

 thallus distinctly nerved, the apex of the lobes much thickened 

 and solid. — Var. Eaton I Aust. has the thallus casspitose and 

 erect, crowded, the involucre narrower, more or less lamellate, 

 parallel to the surface of the thallus and more or less connate 

 with it. 



Hah. — Can. to Fla. and Mo. Var. scariosus in S. C. {Ravenel); var. 

 Ohionensis in 0. (Lesqicereux) ; var. Eatoni in Fla. {Eaton, Smith), Cul)a, 

 (Wright). (Eu.) 



Bib.— Syn. Hep. p. 583; Hep. Europ. p. 160; TorreyBull. VI, 27,304. 



Exsic. — Hep. Bor.-Amer. No. 122. 



9. A. fusiformis Aust. Differs froui No. 8 in its larger 

 size, its more dissected thallus, its much longer subfusiform 

 involucre (4 — 8.5 mm. long); capsule black, 2.5 — 5 cm. long, 

 solid; spores minutely papillose; elaters broAvnish, longer, nar- 

 rower, more opaque. Probaljly a form of the last. 



Hab. — Cal. (Bolander), Ore. (Hall), Observation Inlet (Scouler). 

 Bib.— Torrey Bull. VI, 28. 



10. A. stomatifer Aust. Differs from No. 8 in the more 

 solid thallus with giandulose-cristate margin; involucre longer, 

 narrower, rising from the margin of the thallus; capsule longer, 

 more slender, well provided with stomata, the valves much 

 twisted in drying; spores a little larger, more papillose, deep 

 black. 



fl"a6.— Ore. (Rail). 



Bib.— Torrey Bull. VI, 28. 



11. A. Ravenelii Aust. Thallus small, thick, broadly 

 flabelliform. pale when young, black when older, the 1 acini 83 

 short, repand orlobed: involucre short. 1 — 1.5 mm. high, the 



