202 The North American Cup-Fungi 



Spores becoming rough at maturity. 

 Spores fusiform; apothecia brown. 



Apothecia 2-3 cm. broad and high; stem strongly 



corrugated. 12. P. semitosta. 



Apothecia scarcely exceeding 2 cm. broad and 



high; stem not strongly corrugated. 13. P. fiisicarpa. 



Spores ellipsoid; apothecia olivaceous. 14. P. olivacea. 



1. Paxina Acetabulum (L.) Kuntze, Rev. Gen. PI. 2: 864. 

 1891. (Plate 23.) 



Peziza Acetabulum L. Sp. PI. 1181. 1753. 



Macroscyphtis acetabuli forme S. F. Gray, Nat. Arrang. Brit. PI. 672. 1821. 



Acetabula vulgaris Fuckel, Symb. Myc. 330. 1869. 



Aleuria Acetabulum Gill. Champ. Fr. Discom. 36. 1879. 



Elvela Acetabulum Quel. Enchir. Fung. 275. 1886. 



Phleboscyphus Acetabulum Clements, Crypt. Form. Colo. 298. 1907. 



Acetabula Acetabulum Underw. & Earle, Bull. Alab. E.xp. Sta. 80: 200. 1897. 



Apothecia rather deep cup-shaped, reaching a depth of 2-3 

 cm. or more rarely expanded and shallow, externally cinereous 

 to brownish, minutely tomentose and conspicuously ribbed, 

 reaching a diameter of 3-5 cm., stipitate; hymenium darker 

 than the exterior of the apothecium, brown to brownish-black; 

 stem short and thick, reaching a length of 1-1.5 cm. and a 

 diameter of 1 cm., deeply lacunose, the ribs of the stem being 

 continuous w'ith those of the apothecium, the stem not sharply 

 defined but gradually expanding into the apothecium; tomentum 

 consisting of bunches or fascicles of poorly developed, hyaline 

 hairs, the component cells of which are strongly swollen but 

 contracted at the point of union; asci cylindric above; spores 

 obliquely 1-seriate, ellipsoid, hyaline, each containing one oil- 

 drop, smooth, 12-14 X 18-22 /x; paraphyses straight, enlarged 

 above, reaching a diameter of 5-6 ix at their apices. 



On the ground in woods and open places. 



Type loc.a.lity: Europe. 



Distribution: New York to Minnesota, Colorado, Texas 

 and Alabama; also in Europe. 



ILLUSTRATION.S : Bull. Herb. Fr. pi. 485, f. 4; Vaill. Bot. 

 Paris pi. 13, f. 1; Gill. Champ. Fr. Discom. pi. 32, f. 1; Bres. 

 Fungi Trid. pi. 213, f. 1; Cooke, Mycographia pi. 47, f. 183; 

 Massee, Brit. Fungus-Fl. 4: 290,/. 15, 16; Phill. Brit. Discom. 

 pi. 3, f. 11; Rab. Krypt.-Fl. l'^: 923, /. 1-3; Sow. Engl. Fungi 

 pi. 59; Bull. Lab. Nat. Hist. State Univ. Iowa 6: pi. 19, f. 3; 

 Bull. Soc. Myc. Fr. 3: pi. 5,f. 1. 



