Comprehensive Description
provided by North American Flora
Gymnosporangium trachysorum Kern ; Arth
Mycologia 2 : 237. 1910.
Pycnia epiphyllous, gregarious, in groups 1-2 mm. across, on discolored spots, prominent, conspicuous, punctiform, orange-yellow becoming brownish-black, globoid, 144-165 /i in diameter by 112-128/^ high ; ostiolar filaments 75-90 /^ long.
- 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
