83 
PUCCINIA CLADOPIIILA, Pk. On Stephanomeria minor. Very abundant at tlio sum¬ 
mit of Mt. Helena. It also occurs on S. runcinata. 
Puccinia rubigo-vera, (DC.) Wint. O \\ Agropyrum diver gens, Elymus condensatus, 
Kocleria cristata, and several other grasses. 
Puccinia flosculosorum, (A. & S.) Wint. On Troximon glaucum. That this host 
occurs in Montana is doubted by some, hut it certainly does. Rev. F. D. 
Kesley also has the fungus on this host. 
Puccinia galioiium. Lk. On Galium boreale. Rather uncommon. 
Puccinia giliyE, Pk. ? On Phlox ccespitosa var. condensatus. Common and very de¬ 
structive to host. 
Puccinia graminis, Pers. On Agropyrum violaceum. Common. 
Uromyces eriogoxi, Ell. & Hark. On Eriogonum umbellatum. Apparently rare 
in this vicinity. 
Uromyces junci, (Desm.) Wint. On Juncus longistylis. The fungus has been present 
wherever I have found this host in Montana, but I have not succeeded in finding 
it upon another host, even of the same genus. 
Uromyces terebintiii, (DC.) Wint. On Ehus toxicodendron. Not abundant. 
Urocystis colchici, (Schl.)"Wint. In the leaf tissue of Smilacina stellata growing in 
shady places. 
Ustilago segetum, (Bull.) Wint. On Hordeum jubatum. More common on this host 
than upon cultivated cereals. 
Tuberculina persicina, (Ditm.) Sacc. On the cups of JEcidiumporosum Pk. on Vida 
Americana var. linearis. Common. 
Tuberculina vinosa, Sacc. ? On Lactuca pulchella with zEcidium hemisphcericum Pk. 
Common. 
Erysipiie cichoracearum, DC. On Aster longifolius, A. commutatus Chrysopsis 
villosa, and Cnicus undulatus. Very common. 
Erysipiie communis, (Wallr.) Fr. On Vicia Americana, var. linearis, Oxytropis Lam- 
berti, and Ranunculus repens. Very scarce here on the Oxytropis. 
Piiyllactinia suffulta, (Reb.) Sacc. On Txypha latifolia. Rather common on this 
host in a marsh along Ten-mile Creek near Helena. 
SiiP/EROTHECA castagnei, Ldv. On Eibes floridum in damp woods. Common. 
Peronospora gangliformis, (Berk.) DBy. On Lactucapulchella. Rather frequent 
on hosts growing along the borders of the damp woods and thickets. 
Peronospora myosotidis, DBy. On Echinospcrmum Eedowslcii Leh. and Echinosper- 
mum Jloribundum. Common and extremely injurious to the former host, often 
killing it; more uncommon on the latter and usually less harmful. 
Peronospora pygmeyE, Unger. On upper leaves of Anemone multifida. I found 
this only on one occasion, viz. near the summit of Mount Helena, June 8,1887. 
Crytospileria millepunctata, Grev. On bark of Pop ulus tremuloides. Common. 
Valsa leucostoma, (Pers.) Fr. On bark of Primus Virginiana. Common. 
Didymospiijeria euryasca, Ell. & Gal. On dead leaves of Pinns Murrayana, at the 
summit of Mount Heleua. 
Pleospora iierbarum, (Pers.) Rabh. On dead stems and leaves of Cyrnopteris bi- 
pinnatus, Actinella acaulis, Aplippapus integrifolius, Oxytropis Mouticola, and 
many other plants. 
Pleospora permunda, (Cke.) Sacc. On Clematis Ugustidfolia. 
Piileospora oxytropidis, Ell. & Gal. On Oxytropis Lamberti. Quite destructive 
to the leaves and flower stalks of host, causing the leaflets to fall away and the 
flowering peduncles to dry up. 
Peniopiiora occidentals, E. & E. On bark of Salix amygdaloides and Primus 
Virginiana. 
Spileria (I)othidea) lactucarum, Sclnv. On Lactuca pulchella. Common and 
injurious to the host. 
Claviceps purpurea, (Fr.) Tul. On Agropyrum violaceum and on A. divergens. 
