Comprehensive Description
provided by North American Flora
Gymnosporangium exiguum Kern, Bull. Torrey
Club 35 : 508. 1908.
Pycnia epiphyllous and fructicolous, gregarious, rather sparsely arranged in irregular groups about 1-4 mm. across, on discolored hypertrophied areas, prominent, conspicuous, honey-yellow soon becoming blackish, globoid or depressed-globoid, 150-165 ^ in diameter by 100-130 /^ high ; ostiolar filaments 50-65 ^u 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
