[Vol. 9 



50 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



portion, and with the latter somewhat swollen; hyphae hyaline, 

 even, coarse, 4% m in diameter; basidia simple, 4-spored; spores 

 hyaline, even, 5-7X3-3 1 /£ m- 



76. C. mucida Persoon, Comment, ('lav. 55. pi 2. f.3. 1797; 

 Syn. Fung. 505. 1801; Fries, Syst. Myc. 1: 470. 1821; Hym. 

 Eur. 679. 1874; Sacc. Syll. Fung. 6: 729; Karsten, Finska Vet. 

 Soc. Bidrag Natur och Folk 48: 379. 1889; Peek, N. Y. State 



Mns. Rept. 24: 82. L872; Morgan, Cincinnati Soc. Nat. Hist. 



Jour. 11: 90. 1889; Atkinson, Mushrooms. 203. text j. 204. 1901; 



Coker, Hot. Gaz. 37: 63. text f. 16-17. 1904; Hard. Mushrooms, 



473. text f. 898. 1908. Plate 9, fig. 77. 



Illustrations: Persoon, loc. cit.; Fl. Dan. pi. 1376; Atkinson, 



loc. cit.; Coker, loe. cit.; Hard, loc. cit. 



Clubs gregarious, 6-8 mm. long, small, simple or sparingly 

 ramose-incised, even, naked, white, the apex somewhat yellowish. 

 glabrous; spores hyaline, even, 5-6X2-3 m- 





On green, algal-coated patches of very rotten wood. October 

 and November. Widely distributed, reported common in some 

 Localities. 



C. mucida is noteworthy by its association with a green, algal 

 coating on very rotten wood. This association has been noted 

 by all the European authors cited above and also by Peck, 

 Morgan, and Coker. Persoon referred to the coating as a green, 

 powdery crust and represented it so faithfully in his type illus- 

 tration that it was necessary to eliminate the green bv a color 

 filter in order to bring out the clubs in the photographic illus- 

 tration. Fries called the alga a Chlorococcus, Karsten, a 

 Pleurococcus , and Peck, a confervoid growth. Coker gives a 

 figure showing hyphae running between algal cells and suggests 

 that C. mucida may be a basidiomycetous lichen. A specimen in 



my herbarium, collected at Ithaca, N. Y., by C. O. Smith, shows 

 well the green coating from which the clubs arise; the spores of 



this specimen have the dimensions published by Karsten. For 

 the negative of C. mucida and for other aid in photography I am 

 indebted to Mr. A. F. Camp. 



C. mucida var. Curtisii Berkeley, Grevillea 2: 17. 1S73. 



Plate 9, fig. 78. 



Type: in Curtis Herb, and probably in Kew Herb. 



<4 Clavata brevis lutea apice fusca; stipite albo, e mycelio 



