Peck, C.H. 1903. New species of fungi. Bulletin of the Torrey Botanical Club 30: 99.
Ascomate conical, subacute, free to the middle, longitudinally ribbed, the costae sparingly branched toward the margin, connected by transverse veins, pallid with the edges blackish in the dried specimens; stem hollow, swollen toward the base, minutely squamulose or furfuraceous, whitish; asci cylindric, 8-spored; spores elliptic, even, 20-30 Âµ long, 14-18 Âµ broad.
Ascomate 1.5-2.5 cm long; stem 7-10 cm long, 1-2 cm thick.
Agricultural College, Michigan. June, B. O. Longyear. This species is closely allied to M. gigas, M. rimpsipes and M. semilibera. From the first two it may be separated by the pileus being free from the stem, at least to the middle, and from the last by its larger spores and squamulose stem. The adornment of the stem consists of small conical points which are sometimes darker colored than the stem and are then more conspicuous. In larger specimens there are one to four perforations at the base, but no chinks as in M. rimosipes. The inner surface of the stem is glabrous.