A text-book of mycology and plant pathology . m occurs on the larch,Larix, and its urediniospores and teliospores on Populus deltoides, and P. balsamifera. Calyptospora is a genus of rusts, thelife history of which has been investigated by Hartig, Kuhn andBubak. In July to September, the teliospores appear on the stems ofVaccinium vitis-idcea, where the stem becomes swollen and elongatedand at first of a pink color passing to brown. It occurs on other speciesof Vaccinium, including V. pennsylvanicum in the United States. Theaecia are found in Europe on leaves of Abies pectinata a
A text-book of mycology and plant pathology . m occurs on the larch,Larix, and its urediniospores and teliospores on Populus deltoides, and P. balsamifera. Calyptospora is a genus of rusts, thelife history of which has been investigated by Hartig, Kuhn andBubak. In July to September, the teliospores appear on the stems ofVaccinium vitis-idcea, where the stem becomes swollen and elongatedand at first of a pink color passing to brown. It occurs on other speciesof Vaccinium, including V. pennsylvanicum in the United States. Theaecia are found in Europe on leaves of Abies pectinata and in Americaon A. balsamea. Family Coleosporiace^.—The aecium in this family has a perid-ium. The flattish, Hnear pycnia are subepidermal dehiscing by a 200 MYCOLOGY slit. The teliospores consist of four superimposed cells. There is aNorth American species of this family, Gallowaya pini (formerly Coleo-sporium pini), which has teliospores only and these on the leaves ofPinus inops, , on trees of the same order on which Colesporium has. Fig. 70.—A-D, Uromyces pisi. A, Ascidia on deformed leaves of Euphorbiacyparissias; B, ascidia enlarged; C, teliosori on leaves of Pisum sativum; teliosorienlarged; E and F, Uromyces Irifolii on Trifolium hybridum. (After Dietel, Dienaliirlichen Pflanzenfamilieyi I. lA**, p. 55.) its secia. In Coleosporium, the teliospores are adherent closely with arounded, thickened, gelatinizing pore. The long sterigmata bearlarge, ovate, flattened sporidia. The orange rust of asters and goldenrods,C. solidaginis is reported to cause a sickness of horses, some- RUST FUNGI 20I times resulting in the death of the animals. Its urediniospores andteliospores are on compositous plants and its scial stage on the pitchpine, Pinus rigida, this stage being known in the older books asPeridcrmium acicolum. The species of the genus are all hetcraxious,and aecial stages, whenever found, occur on species of Pinus andare referable to the form genus Peridermium. Arthu
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