Uromyces eugentianae Cummins 1956

Nigredo gentianae Arthur
Uromyces Gentianae Arth. Eot. Gaz. 16 : 227. 1891.
O and I. Pycnia and aecia unknown.
TI. Uredinia amphigenous, numerous, scattered, roundish or oblong, 0.2-1 mm. across, rather early naked, pulverulent, pulvinate, light cinnamon -brown, ruptured epidermis conspicuous ; urediniospores broadly ellipsoid or globoid, 16-18 by 18-23 /z ; wall light goldenbrown, rather thin, 1-1.5/*, finely and inconspicuously echinulate, the pores 4, equatorial.
Telia amphigenous, not readily distinguishable from the uredinia, roundish, 0.2-0.5 mm. across, rather tardily naked, pulverulent, pulvinate, cinnamon-brown, ruptured epidermis noticeable; teliospores broadly ellipsoid, 15-18 by 18-21 ju, wall goldenbrown, about 1.5 ju thick, with a semi-hyaline cap above making the apex 2-3 )Lt thick, finely and closely verrucose ; pedicel colorless, rather stout, about one-half the length of the spore.
On Gentianaceae :
Amarella Hartwegii (Benth.) Arth. [Gentiana Hartwegii'B^nth..), Hidalgo.
Amarella mexicana (Griseb.) Arth. {Gentiana m,exicana Griseb.), Durango.
Amarella occidentalis (A. Gray) Greene {Gentiana quinqueflora occidentalis K, Gray, G. quinquefolia occidentalis Hitchc), Iowa.
Amarella propinqua (Richardson) Greene {Gentiana propinqua'RiohB.rA.son), Vermont.
Amarella striciijiora (Rydb.) Greene {Gentiana acuta striciiflora Rydb., G. strictijlora A. Nels.), Colorado, Nevada, Washington. Type locality : Decorah, Iowa, on Gentiana quinquefolia occidentalis. Distribution : Rare and local in highlands of the northern and western United States and