l\OL. i 



262 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Xerocarpus laeticolor Karsten, Finska Vet.-Soc. Bidrag 

 Natur och Folk 37 : 137. 1882 ; Soc. pro Fauna et Flora Fen- 

 nica Meddel. 9 : 52. 1883. — Corticium laeticolor (Karst.) Saoc. 

 Syll. Fung. 6 : 636. 1888. — Coniophora crocea Karsten, Rev. 

 Myc. 9 : 10. 1887 (this synonym published by Karsten) ; Soo. 

 pro Fauna et Flora Fennica Meddel. 14 : 83. 1888 ; Sacc. Syll. 

 Fung. 6 : 651. 1888; Massee, Linn. Soc. Bot. Jour. 25 : 137. 

 1889. 

 Type : authentic specimen of C. crocea in Burt Herb. 



Fructification effused, adnate, indetermi- 

 j nate, drying raw sienna, the margin of the 



' same color, thinning out; hymenium even, 



compact, somewhat pulverulent; in structure 

 60-120 IX thick, mth the hyphae giving their 

 bright color to the fructification, not in- 

 crusted, occasionally nodose-septate, 3-4 n in 

 diameter, ascending more or less densely 

 from the substratum to the hymenial surface ; 

 cystidia cylindric, not incrusted, simple, or 

 few-septate, 4-41/2 n in diameter, emerging 

 20-60 /i ; spores concolorous with the hyphae, 

 even, flattened on one side or slightly curved, 



6-7x21/2-3 M. 



Fructifications 4 cm. long, 2-21/2 cm. broad. 

 On badly decayed, coniferous wood. Elk- 

 mont, Tennessee. September. Probably 

 rare. 



This species suggests by its bright color 

 and thin, adnate habit the conidial stroma of 

 some species of Hypoxylon, and it may have been overlooked 

 heretofore on account of this resemblance. It is well marked 

 by its bright color, thin and compact habit of growth, small, 

 slender spores, and cystidia. 



Specimens examined: 

 Finland : Mustiala, P. A. Karsten, under the name Coniophora 



crocea. 

 Tennessee : Elkmont, C. H. Kaufman, 70 (in Mo. Bot. Gard. 

 Herb., 16397). 



Fig. 17 



C. laeticolo 



Section 



hyphae, cystidium, 

 basidia, spores 

 X 665. 



showing 



