297 



Aspidium dryopteris. J. Fredrikshavn, Eskaer in Vendsyssel (^^/t 71), Brud- 

 dal ! , Hinnerup, Friisenborg, Silkeborg Nerreskov and Vesterskov, Addit 

 Skov; S. Ruderhegn, St. Hareskov (C. H. O.), Tystrup S0 (Exc. ''^/e 91). 



Pucciniaceae. 



Gymnosporangium. 



All the Danish species of Gymnosporangium are rather uniform; 

 St. I occurs on the leaves of Pomaceae ; the spermogonia are very con- 

 spicuous as yellow, shining spots on the upper-side of the leaves; 

 June— August; st. I called aecidium or roestelia does not appear until 

 autumn on the lower-side of the same spots; st. II is wanting; st. Ill 

 is perennial in branches of Juniperus; the sori appear in April and 

 May, and in moist weather they are large and gelatinous. Both st. I 

 and St. Ill early roused the attention of naturalists, thus Gymnospo- 

 rium juniperinum is one of the few fungi described by Linne. It must 

 be observed that the species of Gymnosporangium may cause forma- 

 tion of spermogonia also on other pomaceae than those on which it 

 can produce aecidia (R 83 a). 



1392. Gymnosporangium sabinae (Dickson) Wt., Syn: Tremella 

 sabinae Dicks. Plant, crypt. Brit. 1785, Podisoma sabinae Tul., Puc- 

 cinia juniperi Pers. Syn. ^^°, Tremella fusca de Cand. Encycl. VIII 1806, 

 Gymnosporangium fuscum (de C.) 0rsted. 



St. I. Lycoperdon cancellatum Jacquin. Fl. D. tab. 704, Roestelia cane. 

 Rebent. Aecidium cane. Pers. Syn. ™^ Gitter-Bavrerust (R 77 b ^"), 

 Gitterrust (R 82 b '), Paeretraeets Gitterrust (R 88 m ^^ R 02 a '»^ e. 

 icon. Lind &. Ravn 10 '^), Lit: 0rsted 66 a, 66 b c. icon, opt., 68 a, 

 R 84 g, 86 n, 97 c £. 00 j. 



0rsted states (66 a '^'^ 6^ 68 b) that it was found for the first time 

 in this country in the garden of Valle Castle 1855; Rostrup found 

 it near Skaarup in 1862. According to the rules of nomenclature 

 adopted by the Botanical Congress at Brussels 1910 the name besto- 

 wed upon it by Persoon in Synopsis ought to be preferred to the 

 older one by Dickson; in the present ease this would, however, be 

 very inconvenient, so I hope that Dickson's name will be preserved. 



Pirus communis. Slight attacks may occur in most gardens, more severe 

 ones only where Juniperus sabina is planted in the neighbourhood. May 

 occur both on leaves and on the fruit. Pirus elaeagnifolia. S. Kobenhavn (only 

 spermogonia). Juniperus sabina, quite common in the gardens in all parts of 

 Denmark; noticed from J., Samse (Exc. ^^h 87), F., S., L., Falsi Juniperus 

 foefida. F. Langese (A. Andersen); S. Carlsberg (W. Johannsen). Juniperus 

 tamariscifolia. S. Carlsberg (W. Johannsen). 



