Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 180. a. Phragmidium Kuln Pers.; teleutosorus, x 240: after Sappin-Trouffy; b. Pkragmidiumviolaceum Wint.; teleutosorus, 240; after Blackmail. except in the genus Uredinopsis, on ferns, where they are scattered. Like theuredospores the teleutospores are with or without paraphyses and like themarise from rectangular basal cells. They appear as narrow binucleateoutgrowths in which one or more divisions take place so that, in themajority of cases, a stalk is formed below and the simple or compoundteleutospore is produced above (fig. 181). The st

Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 180. a. Phragmidium Kuln Pers.; teleutosorus, x 240: after Sappin-Trouffy; b. Pkragmidiumviolaceum Wint.; teleutosorus, 240; after Blackmail. except in the genus Uredinopsis, on ferns, where they are scattered. Like theuredospores the teleutospores are with or without paraphyses and like themarise from rectangular basal cells. They appear as narrow binucleateoutgrowths in which one or more divisions take place so that, in themajority of cases, a stalk is formed below and the simple or compoundteleutospore is produced above (fig. 181). The st Stock Photo

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Fungi, Ascomycetes, Ustilaginales, Uredinales . Fig. 180. a. Phragmidium Kuln Pers.; teleutosorus, x 240: after Sappin-Trouffy; b. Pkragmidiumviolaceum Wint.; teleutosorus, 240; after Blackmail. except in the genus Uredinopsis, on ferns, where they are scattered. Like theuredospores the teleutospores are with or without paraphyses and like themarise from rectangular basal cells. They appear as narrow binucleateoutgrowths in which one or more divisions take place so that, in themajority of cases, a stalk is formed below and the simple or compoundteleutospore is produced above (fig. 181). The stalk may increase consider-ably in length (Gymnosporangium, Uromyces, Puccinid) or may be veryshort or absent (Colcosporiuiu, Melampsord). As already stated tin; young teleutospore cell is binucleate (fig. [82);when the wall is fully thickened the two nuclei fuse and the spore passesinto the resting state. On the renewal of its development two nucleardivisions occur and the gametophytic phase is initiated with the productionof the uninucleate b

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