Comprehensive Description
(
anglais
)
fourni par North American Flora
Pucciniastrum sparsum (Wint.) Ed. Fisch. Beitr. Krypt. Schweiz
2 2 : 469. 1904.
Melampsora sparsa Wint. in Rab. Krypt. Fl. I 1 : 245. 1881.
Uredo Arbuli Dietel & Holway, Bot. Gaz. 18 : 256. 1893.
Pucciniastrum Arbuli Dietel & Holway ; Dietel, E. & P. Nat. Pfl. I 1 ** : 47. 1897.
Uredo Copela?idi Sydow, Ann. Myc. 2 : 31. 1904.
O and I. Pycnia and aecia unknown.
Uredinia amphigenous or oniy hypophyllous, gregarious on discolored spots, or scattered, bullate, round or irregular, 0.3-0.5 mm. across,dehiscent by central pore, long covered by overarching epidermis ; peridium hemispherical, firm, cells large, elongate vertically, walls thin, 2^, gradually thickened below toward the orifice, smooth, ostiolar cells 35-50 /* high, greatly thickened below, coarsely to finely echinulate above; urediniospores clavate-oblong or ellipsoid, 12-20 by 26^-5 i wall colorless, thin, 1-2 /£, finely and sparsely echinulate ; contents orange-yellow when fresh.
- citation bibliographique
- Joseph Charles Arthur. 1907. UREDINALES; COLEOSPORIACEAE, UREDINACEAE, AECIDIACEAE (pars). North American flora. vol 7(2). New York Botanical Garden, New York, NY
