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Remarks (internal):Pycnia and aecia are described as localized and amphigenous in groups by Arthur (Manual of the rusts of United States and Canada. Purdue Research Foundation, Lafayette, Ind. 1934); however, there are no collections in DAOM showing these states. The teliospore wall is smooth, but the pore surfaces show a wrinkled appearance as evidenced by SEM photo (fig. 4). This is the probable reason for Arthur's (op. cit.) description of the wall as . . . "smooth or somewhat rarely verrucose toward the apex".
This rust is recorded from Alaska (Arthur, op.cit.) on Gentiana algida Pall. (as G. romanzowii Ledeb.), a host also known from southwestern Yukon (Gillett, J.M. The gentians of Canada, Alaska and Greenland. Agriculture Canada Res. Branch Publication 1180. 1963). The range of the rust in Canada is expected to extend into this region.
Description type:Non-original description 
Description:Puccinia gentianae (Str.) Rohling Deutsch. Fl. ed. 2.3 (2): 131. 1813.
= Uredo gentianae Str. Ann. Wett. Ges. 2: 102. 1811.
Pycnia and aecia not present on Canadian specimens. Uredinia orange-brown, mostly epiphyllous; long-covered by epidermis, becoming pulverulent, occurring in annular rings and causing chlorosis, or somewhat scattered. Urediniospores ellipsoid to obovoid, 19-35 x 15-25 µm; wall pale yellow, 1.5-2.0 µm thick, evenly echinulate, spines 1.0 µm high, 1.5-3.0 µm apart; pores 2-3, equatorial, conspicuous. Telia dark brown, shiny after rupturing of epidermis, mostly epiphyllous, in annular rings with chlorosis, or scattered. Teliospores broadly ellipsoid, rounded at both ends, not or only slightly constricted at septum, 25-46 x 21-30 µm; wall dark brown, uniformly thickened, between 1.5-2.5 µm thick, smooth; pores 2, one-apical to occasionally depressed halfway to septum, and 1 septal occasionally to ½ depressed, both with pale yellow papillae up to 2.5 µm high, surface of papillae becoming somewhat shallowly rugose; pedicel hyaline, fragile, occasionally offset.
Hosts: Gentianaceae: Gentiana affinis Griseb., G. andrewsii Griseb., G. sceptrum Griseb. Distribution: Ontario, Manitoba, Saskatchewan, Alberta, British Columbia.
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