. Danish fungi as represented in the herbarium of E. Rostrup;. Fungi. 18. mycologicae, sistens fungos in peregrinis terris a botanicis Danicis nuper collectos. Upsala 1851). About 1860, when he had been ap« pointed professor of botany, he occupied himself very much with the parasitic fungi, mostly with such of these as are found on the corn or on other cultivated plants. When "Selecta fungorum carpologia" by TuLASNE Brothers, had been published in Paris in 1861, 0rsted tried to follow in their footsteps by endeavouring to find the genetic relation between the ascospore stage of the P
. Danish fungi as represented in the herbarium of E. Rostrup;. Fungi. 18. mycologicae, sistens fungos in peregrinis terris a botanicis Danicis nuper collectos. Upsala 1851). About 1860, when he had been ap« pointed professor of botany, he occupied himself very much with the parasitic fungi, mostly with such of these as are found on the corn or on other cultivated plants. When "Selecta fungorum carpologia" by TuLASNE Brothers, had been published in Paris in 1861, 0rsted tried to follow in their footsteps by endeavouring to find the genetic relation between the ascospore stage of the Pyrenomycetes and their conidial stage among the socalled fungi imperfecti. He particulary studied a series of fungi on fallen cones of Coniferae and heres by made the important discovery that Phelo* nitis strobilina, which had hitherto been cons sidered as belonging to Myxomycetes, was a Caeoma, and accordingly must be referred to Uredinales (0rsted 63 a &. b). His obser? vations of the fungus which he called Pleoss poropsis strobilorum, which, according to the description and figure must be considered Rosellinia obliquata (Fries) Wt. and which he considered as genetically related to four different "fungi imperfecti", has never been re-examined by others, and the proofs stated by him are not convincing. Much more for* tunate was 0rsted when, in 1865 he commenced making cultural experiments, with the species of Gymnosporangium on branches of Juniperus, infecting leaves of Pirus, Sorbus and Crataegus and thus finding the heteroecism of Gymnosporangium sabinae, juniperi and clavariiforme at the same time and independently of de Bary's diss covery of the heteroecism of Puccinia graminis, dispersa and coronata. More of 0rsted's books treat chiefly the diseases of cultivated plants and their control (0rsted 62, 63 c, 63 d, 65 c, 66 b); we must therefore consider him the closest predecessor of Rostrup, both as a mycologist, and as a phytospathologist. (Concerning 0rsted
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