[Vor. 4 
336 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
the margin vinaceous-gray — а color contrast by which this 
species is noteworthy—but in addition hair-like cystidia are 
present on the convex edges of the folds; cystidia have been 
found in but four other species of Merulius which I have 
studied. 
Specimens examined: 
Massachusetts: Sharon, 4. P. D. Piguet, type (in Farlow 
Herb., 174, and in Mo. Bot. Gard. Herb., 54974). 
23. M. Farlowii Burt, n. sp. 
Type: in Farlow Herb. and in Mo. Bot. Gard. Herb. 
Fructification resupinate, effused, adnate, glabrous, very 
thin, the margin thinning out, narrow, byssoid, whitish; 
hymenium drying between drab-gray and ecru-drab, even near 
the margin, becoming reticulate-plicate, porose in the central 
region, with the subequal, angular, shallow pores about 3 or 
4 to a mm.; in structure 50 д thick, with the 
о 
Pe folds standing out up to 150 д further, com- 
Fig 21 posed of a very few hyphae running along the 
M. Farlowii. substratum and bearing а broad, dense 
Spores x 870. В я . А 
See pl. 21, f. 20. hymenium; hyphae hyaline, not inerusted, 
rarely nodose-septate, thin-walled, collapsed; 
cystidia present on the folds in the form of scattered, flexuous, 
tapering, non-incrusted hairs 24 џ in diameter, emerging up 
to 20 и; spores hyaline, even, flattened on one side, 3X14 и; 
in preparations stained with eosin a narrow subhymenial zone 
is stained Isabella-color temporarily. 
Fructification 7 em. long, 24 cm. broad. 
On Pinus. New Hampshire. August. Rare. 
M. Farlowii belongs in the group with M. ceracellus but is 
of different color from that species, does not crack and scale 
off from the substratum, and has cystidia; from M. hirtellus, 
which has cystidia, the present species differs in coloration, 
in being adnate, in being distinetly angular-porose, and in 
not having its cystidia inerusted. What I understand from 
European specimens to be M. crispatus Müller, Flora Daniea, 
pl. 716, f. 2, has a thicker fructification, larger pores and 
spores, and lacks cystidia. 
