[Vor. 4 
358 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Coll. N. Y. State); Albany, С. С. Lloyd, 10107 (in Lloyd 
Herb.). 
Indiana: Fern, L. M. Underwood (in N. Y. Bot. Gard. Herb.). 
Illinois: Peoria, C. J. Humphrey (in Mo. Bot. Gard. Herb., 
42599). 
Missouri: Mo. Bot. Gard. greenhouses, St. Louis, three col- 
lections, G. T. Moore, E. A. Burt, Н. von Schrenk (in Mo. 
Bot. Gard. Herb., 54904—54906, respectively). 
Nebraska: Lincoln, Leva B. Walker (in Mo. Bot. Gard. Herb., 
04448). 
California: Claremont, L. M. Clency, Pomona Coll. Herb., 
1641 (in Lloyd Herb.). 
Arizona: Fort Valley Experiment Station, W. H. Long, 21299 
(in Mo. Bot. Gard. Herb., 54938). 
39. M. byssoideus Burt, n. sp. 
Type: in Mo. Bot. Gard. Herb. 
Fructification resupinate, effused, dry, flaxy, drying be- 
tween Saccardo’s umber and Dresden-brown throughout, sep- 
arable from the substratum, the margin rather thick and un- 
dulate; hymenium minutely rugose-porose, 
О with very slightly elevated, thin folds which 
O О outline rather imperfect, shallow pores about 
Fig. 37 2-4 to а mm.; in structure 300-400 и thick, 
M. byssoideus. with the folds extending about 400 д more, 
cn gts xa composed of loosely interwoven, thin-walled 
hyphae 3-4$ р in diameter, occasionally 
nodose-septate, having the general color of the fructification 
but losing their color by solvent action of the aleohol when 
being sectioned; spores even, 45-634-44 и, deep olive-buff 
under the microscope, concolorous with the fructification; no 
eystidia. 
Fructification 3 em. long, 2 em. broad. 
On soil. Rio Piedras, Porto Rico. August. 
The distinctive characters of M. byssoideus are its flaxy, 
dry structure, Dresden-brown color throughout, minutely 
gyrose-porose hymenium, and small, colored spores. It is not 
a Рота, because sections show the specimen bearing spores 
