494 FUNGI IMPERFECTI. 



this fungus were found by Boehm 1 on diseased cypress trees, and 

 although investigations are not yet complete, it is believed that 

 this l'<'xt<t/n;-.i(i is the cause of a well-known disease on cypress. 

 The symptoms on Chamaecyparis Mcnziesii are local constriction 

 of stems and branches, and death of portions beyond. The rind 

 and cambium of constricted places are killed, the bark becomes 

 split, and the wood dries up. P. funn-i-n is a well-known sapro- 

 phyte on twigs and needles of Cupressus, Juniperus, and other 

 Conifers ; its occurrence as a parasite has been suggested several 

 times. 



P. gongrogena Temme 2 is said to cause the canker of willow. 

 In diseased willows Temme found an intercellular and an 

 intracellular mycelium with pycnidia and conidia of P<'*t<il<>zzia, 

 but other pycnidia of unknown affinity were also present. 



P. insidiens Zab. On bark of Ulmv.s america//". (U.S. 

 America. ) 



P. phoenicis Grev. causes a disease on indoor cultivated palms. 



The following are some of the more important forms frequenting 

 living leaves : 



P. Guepini Desm. 3 (U.S. America). The conidia of this species 

 are found on large spots with dark margins on living leaves of 

 Camellia japonica, Magnolia, Citrus, Rhododendron, and other 

 plants. Spore-patches appear on the epidermis, and give off 

 conidia embedded in a mucilaginous slime. The conidia have 

 three dark median and two hyaline terminal cells, the distal one 

 bearing the characteristic appendages. The leaves are permeated 

 with mycelium and fall prematurely. 



P. inquinans ('. et Hark. On Eucalyptus in California. 



P. stictica B. et C. On Platanus occidentalis and Tilia in United States. 



P. concentrica B. et Br. On leaves of Crataegus, Pi/rus, Castanea, and 

 Quercus in North America. 



P. suffocata E. et E., and P. discosioides E. et E. On cultivated and 

 wild rose shrubs in America. 



Pestalozzina. 



Conidia similar to those of Pestalozzia, but all the cells 

 hyaline. 



1 Ztitschrift f. Fortt. u. Jagd-wesen, 1894, p. 63. 



"Thiel's landwirth. Jahrbuch, 1887; and Ber. d. deutsch. botan. Ges., 1S90. 



; Annul, ilf-s Science natur., Ser. n., Vol. xui., 1840; Briosi et Cavara, Funyhi 

 vi. 



