46 Illinois State Laboratory of Natural History. 



4. A csespiticius DeNot. Tliallus dissected to the base, 

 the divisions 4 — 8.5 mm. long, narrow, variously lobed, expand- 

 ed at the apex, dark green, more or less glandular; involucre 

 broad, scarcely 2 mm. high, broadly sulcate and obtusely 2-an- 

 gled on the back, minutely punctate, the apex subtruncate, 

 repand-tridentate, the mouth narrowly scarious; capsule thick 

 1 — 1.5 cm. long, sessile, sulcate or angled, the apex obtuse and 

 subtruncate; columella thickish, fibrillose. {A. tuherosus 

 Tayl.) 



Hah.— Tex.? Cal. (Eu.) 



J5*.— Syn. Hep. p. 588; Hep. Europ. p. 161; Torrey Bull. VI, 25. 



5. A. Hallii Aust. Thallus 1.3 — 2.5 cm. long, 1-^2 mm. 

 wide, caespitose, often erect, linear or elongate-flabelliform, the 

 apex entire or slightly lobed, most usually glandulose-thick- 

 ened; involucre terminal, pellucid, pale green, 2 — 3 mm. long, 

 the apex truncate; capsule about 6 mm. long, short pedicelled, 

 sulcate, very narrow, the valves thick; spores smooth. 



Hab. — On the ground and on rocks; Silverton and Salem, Ore. {Hall), 

 Marine Co., Cal. (Bolander). 

 Bib.— Torrey Bull. VI, 26. 



6. A. Oreganus Aust. Thallus thin, glandular-thick- 

 ened in places, involucre very short, abruptly constricted above 

 the middle, inflated below, minutely and closely punctate, the 

 mouth subtruncate, slightly repaud-lobate ; capsule sessile, 

 bulbous at base, somewhat thickened, about 1.3 cm. long, the 

 valves splitting to the mouth of the involucre, coherent at the 

 apex; spores small, indistinctly granulose. 



Hab.— Ore. (Hall). 

 Bib.— Torrey Bull. VI, 26. 



7. A. sulcatus Aust. Thallus 4—6 mm. long, deep 

 green, apparently hollow, caespitose, erect, attenuate at base, 

 flabelliform, the margin variously lobed and repand; involucre 

 obovate-quadrate, about 1 mm. high, somewhat roughened; 

 capsule 4 — 5 mm. high, narrow, erect, or somewhat curved, 

 sulcate, almost sessile, compressed-glandular; spores rather 

 large; elaters short. 



Hab.— On. moist earth; Salem, Ore. {Hall). 

 Bib.— Torrey Bull. VI, 27. 



** Spoirs hhick ; chifcrsfiiscoKs. 



