Uromyces dianthi (Pers.) Niessl 1872

Foodplant / parasite
amphigenous uredium of Uromyces dianthi parasitises live leaf of Dianthus barbatus

Foodplant / parasite
amphigenous uredium of Uromyces dianthi parasitises live leaf of Dianthus caryophyllus

Foodplant / parasite
amphigenous uredium of Uromyces dianthi parasitises live leaf of Dianthus chinensis

Foodplant / parasite
uredium of Uromyces dianthi parasitises live stem of Dianthus caryophyllus garden hybrids
Other: major host/prey

Nigredo caryophyllina (Sclirank.) Arthur
Lycoperdon caryophyllinum Schrank, Baier. Fl. 2 : 668. 1789.
Uredo DianthiV&rs. Syn. Fung. 222. 1801.
Caeoma Dianthi I,ink, in Willd. Sp. Pl. 62 : 26. 1825.
Uromyces Dianthi Niessl, Verh. Nat. Ver. Briinn IO2 : 162. 1872.
Uromyces caryophyllinusWint. in Rab. Krypt. Fl. 1^ : 149. 1881.
Caeom,urus caryophyllinus Kuntze, Rev. Gen. 3^ : 449. 1898.
Vredo dianthicola Hariot, Jour, de Bot. 14 ; 116. 1900.
Aecidium Euphorbiae-Gerardianae Ed. Fisch. Beitr. Krypt. Schweiz 2^ : 530. 1904.
Pycnia hypophyllous, scattered, abundant on the lower leaves, from diffused mycelium, punctiform, conspicuous, honey-yellow becoming brownish, in section globoid, 130-160/1 in diameter; ostiolar filaments strongly developed, 40-85 jit long.
1. Aecia hypophyllous, scattered thickly over the siirface of the upper leaves, from
diffused mycelium causing a slight general hypertrophy, round or somewhat oval, 0.3-0.5
mm. across, orange-yellow when fresh ; peridium colorless, short, the margin erect or
slightly recurved, coarsely erose ; peridial cells in radial section quadratish, 19-25 ju in
length and breadth, a'butted, with slight overlapping projection at outer edge, the outer
wall very thick, 7-10 m, flat, transversely striate, smooth but appearing finely punctate, the
inner wall much thinner, 3-5 )u, projecting in a. half circle, strongly and thickly verrucose ;
aeciospores angularly globoid, 16-22 jit in diameter; wall nearly or quite colorless, very thin,
1 ju or less, finely and closely verrucose.
On Euphorbiaceae :
Euphorbia Gerardiana Jacq., only in Europe.
Uredinia amphigenous, scattered or often in loose groups, oval or irregular, often confluent, rather large, 0.5-1.5 mm. across, rather tardily naked, pulverulent, dark cinna-
F
mon-brown, ruptured epidermis conspicuous ; urediniospores broadly ellipsoid, 20-24 by 24-30 m; wall golden-brown, rather thick, 2.5-3 m, closely and strongly echinulate, the pores 3 or 4, equatorial. 247
Teha amphigenous, scattered or more or less gregarious, roundish, oval, or irregular and confluent, equaling the uredinia in size, rather early naked, somewhat pulverulent, chestnut-brown, ruptured epidermis conspicuous; teliospores ellipsoid, 19-23 by 25-29 ju, usually roundish above and below; wall light chestnut-brown, rather thick, about 3m, with a low hyaline papilla over the germ-pore, very finely verrucose, appearing nearly or quite smooth when wet ; pedicel colorless, short.
On Caryophyllaceae :
DiantJiMS barbatus L., Nebraska.
Dianthus Caryophyllus I^., Colorado, Indiana, Iowa, Kansas, Maine, Maryland, Massachusetts Michigan, Nebraska, Ohio, Pennsylvania, South Dakota, Texas, Utah, Wisconsin ; Ontario. ' '
Dianthus chinensis ly. {D. sinensis Hort.), Nebraska. Dianthus pelviformis Heutfel, Nebraska. Type LOCALITY : Bavaria, on " Gartennelke " _Dian thus barbatus'].
Dlstribution : Chiefly in greenhouses throughout the temperate portions of North America especially in the northern states and only in the sporophytic phase ; also in Europe and Tapan >./ }s'^y^7^^1Vi^^ '• ■^^'*''^''^P^Schweiz 22 : /. 10, 11; McAlpine, Rusts Austr. pu GJ 30, 31;

Uromyces dianthi is a plant pathogen infecting carnations and Euphorbia.