Cumminsiella mirabilissima (Peck) Nannf. 1947

Foodplant / parasite
pycnium of Cumminsiella mirabilissima parasitises live leaf of Mahonia
Other: unusual host/prey

Foodplant / parasite
aecium of Cumminsiella mirabilissima parasitises live leaf of Mahonia aquifolium
Other: unusual host/prey

Foodplant / parasite
aecium of Cumminsiella mirabilissima parasitises live leaf of Mahonia bealei
Other: unusual host/prey

Foodplant / parasite
aecium of Cumminsiella mirabilissima parasitises live leaf of Mahonia fortunei
Other: unusual host/prey

Foodplant / parasite
aecium of Cumminsiella mirabilissima parasitises live leaf of Mahonia undulata
Other: unusual host/prey

Uropyxis sanguinea (Peck) Arthur
Uromyces sanguineus Peck, Bot. Gaz. 4 : 128. 1879.
Puccinia mirabilissima Peck, Bot. Gaz. 6 : 226. 1881.
Uropyxis mirabilissima Magn. Ber. Deuts. Bot. Ges. 10 : 193. 1892.
Dicaeoma mirabilissimum Kuntze, Rev. Gen. 3 : 469. 1898.
Pycnia unknown
Uredinia hypophyllous, scattered or somewhat gregarious, on small discolored usually reddish spots, roundish or ovoid, 0.3-0.8 mm. long, soon partially or wholly naked by epidermis rupturing along one side or irregularly, cinnamon -brown, ruptured epidermis especially conspicuous ; paraphyses none ; urediniospores obovate, pyriform, or ellipsoid, 18-23 by 21-32^, often narrowed at base and less often at apex; wall goldenyellow, medium thick, 2.5-3^, finely and closely verrucose, pores 4, equatorial.
Telia hypophyllous, at first arising from the uredinia, usualiy not plentiful, scattered, round, 0.3-0.5 mm. across, soon naked, pulvinate, ruptured epidermis usually inconspicuous ; teliospores ellipsoid, 20-25 by 30-35 u, rounded at both ends, much constricted at septum ; wall laminate, chestnut-brown, uniformly thick, 3-5,", gelatinous layer inconspicuous, finely and closely verrucose, pores two in each cell and lateral ; pedicel colorless, persistent, uniform diameter, about 6/*, solid except at 'base, 100-150/^ long.
On Berberidaceae :
Mahonia Aquifolium (Pursh) Nutt. {Berberis Aquifolium Pursh, B. repens lindl., B. nana Greene, Odostemon Aquifolittm Rydb.), Arizona, California, Colorado, Idaho, Montana, Nebraska, New Mexico, South Dakota, Utah, Wyoming.
Mahonia diversifolia Sweet {Berberis Aquifolium Ivindl., Odostemon nutkanus Rydb.),
Oregon, Washington.
Mahonia nervosa (Pursh) Nutt. {Berberis nervosa Pursh), California.
Mahonia pinnata (Lag.) Fedde {Berberis pinnata Lag.), California; Guatemala.
Mahonia pumila (Greene) Fedde {Berberis pumila Greene), Oregon. Type locality: Colorado, on Berberis Aquifolium. Distribution : Throughout the mountain region from Wyoming and Washington south to