Comprehensive Description
provided by North American Flora
Phragmidium americanum Dietel, Hedwigia 44 : 124.. 1905
Phragmidium mucronatum americanum Peck, Ann. Rep. N. Y. State Mus. 28: 86. 1876.
Pycnia chiefiy epiphyllous, usualiy few, gregarious and often confluent, inconspicuous, subcuticular and extending downward between the cells, pale honey-yellow, lowconoidal or discoidal, 80-125// broad by 30^0 /^ high.
- bibliographic citation
- Joseph Charles Arthur, Frank Dunn Kern. 1912. (UREDINALES); AECIDIACEAE (continuatio), GYMNOSPORANGIUM. North American flora. vol 7(3). New York Botanical Garden, New York, NY
