126 



THE PLANT WOELD 



3- 



Inner peridium sessile, spores 3-6/i. 



A. Mouth stellately-lacerate. 



B. Mouth dentate-lacerate. 



C. Mouth suIcate-pHcate. 



a. Mouth in a depressed disk. 



b. Mouth prominent, not in a depressed disk. 



D. Mouth ciliate-fimbriate. 



a. Inner peridium 2cm. or more in diameter. 



a. Outer peridium of two lajers, the inner one sep- 



arating and becoming vaulted. 



b. Outer peridium of two layers, the inner one be- 



coming partially separated and forming a cup. 



c. Outer peridium of one laj-er. 



b. Inner peridium less than 2cm. in diameter. 



a. Segments of outer peridium with lower surface 



longitudinally cracked. 



b. Segments of outer peridium with lower surface 



not thus cracked. 



c. Inner peridium ovoid. 



d. Inner peridium globose. 



E. Mouth dentate. 



Inner peridium sessile, spores 8-10//. 



A. Mouth ciliate-fimbriate. 



B. Mouth lacerate 



a. Inner peridium somewhat reticulate 



b. Inner peridium smooth. 



c. Inner peridium rather thick, mouth rigid 



G. delicahcs. 

 G. argenteus. 



G. umbilicatus. 

 G. stiiatiis. 



G. radicans. 



G. triplex. 

 G. fimbriatus. 



G. vittatus. 



G. saccatus. 

 G. lage7iaeformis. 

 G. vebitiniis. 

 G. riifescens. 



G. manimosus. 



G. hygrometricus. 

 G. fibrillosus. 

 G. linkii. 



Ge ASTER FORNICATUS (Hucls.) Fr. Outer iDeridinm consisting 

 of two layers, usually four parted but rarely -five or more parted, whit- 

 ish, becoming brownish and much reflexed when dried, the outer coat 

 separating from the inner and remaining attached to the ground, l-3cm. 

 high and l-2cm. broad; inner peridium subglobose, grayish brown with 

 a short pedicel 1.5-2.6cm. in diameter; mouth prominent, elongate con- 

 ical, sulcate-ciliate; columella slender, subclavate; capillitium brown; 

 spores subspherical, reticulate, brown, 3.5-5/^. On the ground, fre- 

 quently among pine leaves, eastern United States. Fig. 1. 



Geaster radicans B. & C. Outer peridium of two layers, the inner 

 separating from the outer and becoming vaulted, the segments reflexed; 

 the inner peridium reddish, very short pedicellate, about 1.5cm. in di- 

 ameter; mouth ciliate-fimbriate, silky. Carolina. 



Geastsr triplex Jungh. Outer peridium consisting of two layers, 

 the inner layer becoming detached near the middle and forming a cup 

 about the base of the inner peridium; segments 4-6, revolute; inner 

 peridium globose or depressed-globose, pale, 1.6-2.5cm. in diameter; 

 mouth conical, ciliate-fimbriate; spores subglobose or globose, 5-5.5/". 

 Eastern and central United States.* 



The Asa Gray Bulletin, 6: 93, //. // /. j. December, 1898. 



