Eriosporangium evadens (Harkn) pt 3 1913
Coleosporium baccharidis
Puccinia evadens
Caeoma negerianum
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Pycnia amphigenous and caulicolous, scattered among the aecia on the leaves and younger branches, inconspicuous, honey-yellow, globoid or ovate, 150-175 um in diameter.
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Aecia amphigenous, or more commonly caulicolous, causing fusiform or irregular swellings of the branches, sometimes forming witches' brooms, scattered, oblong or oblong- linear, 0.5-1 mm. wide by 1-4 mm. long, early dehiscent, at first orange-colored, drying to a dirty-white, pulverulent, ruptured epidermis or cortex overarching, when the spores fall away showing pits or fissures; aeciospores irregularly oblong, or oblong-fusiform, 22-26 by 35-60 um, often narrowed and acute at both ends, but especially above; wall pale- yellow or quite colorless, moderately thick, 2-3 um, somewhat thicker above, 3-9 um , noticeably but finely verrucose, with thickly set and irregular warts.
II. Uredinia chiefly hypophyllous, scattered, usually few, round or oblong, 0.1-0.3 mm. long, soon naked, orange-colored, becoming pale, somewhat pulverulent, ruptured epidermis often overarching, otherwise inconspicuous; urediniospores broadly ellipsoid, obovate-ellipsoid, or nearly globoid, 23-27 by 27-35 um; wall thin, 1.5-2 um nearly colorless, finely and rather sparsely verrucose-echinulate, with points about 3 um apart, the pores small, very indistinct, apparently more than 4 and scattered.
III, Telia chiefly hypophyllous, and to some extent on the young branches, scattered, round, 0.3-1 mm. across, soon naked, pulvinate, pale cinnamon-brown, or cinereous by germination, ruptured epidermis inconspicuous ; teliospores oblong or obovate-oblong, 27-32 by 48-63 m, rounded at both ends, or somewhat narrowed below, somewhat constricted at the septum; wall pale-brownish, or almost colorless, smooth, thin, 1.5-2 um, usually thicker at the apex, 3-6 um; pedicel colorless, or slightly tinted, terete, 6-10 um in diameter, thin-walled, once to twice length of spore.
On Carduaceae :
Baccharis consanguinea Greene, California.
Baccharis emoryi A. Gray, Arizona.
Baccharis pilularis DC, California.
Baccharis pteronioides DC, Michoacan.
Baccharis sp., Cuba.
Type locality: San Francisco, California, on Baccharis pilularis.
Distribution : Central California and Arizona southeastward through Mexico, and the West Indies; also in South America.
Dicaeoma evadens (Hark) Arthur & Jackson pt 6 1921
Coleosporium baccharidis
Puccinia evadens
Caeoma negerianum
Eriosporangium evadens
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Pycnia amphigenous and caulicolous, scattered among the aecia on leaves and younger branches, inconspicuous, honey-yellow, globoid or ovoid, 150-175 um in diameter.
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Aecia amphigenous, or more commonly caulicolous, causing fusiform or irregular swell- ings of the branches, sometimes forming witches' brooms, scattered, oblong or oblong-linear, 0.5-1 mm. wide by 1-4 mm. long, early dehiscent, at first orange-colored, drying to a dirty- white, pulverulent, ruptured epidermis or cortex overarching, when the spores fall away showing pits or fissures; aeciospores irregularly oblong or oblong-fusiform, 22-26 by 35-60 um, often narrowed and acute at both ends, but especially above; wall pale-yellow or quite colorless, moderately thick, 2-3 um., somewhat thicker above, 3-9 um., noticeably but finely verrucose, with thickly set and irregular warts.
II. Uredinia chiefly hypophyllous, scattered, usually few, round or oblong, 0.1-0.3 mm. long, soon naked, orange-colored, becoming pale, somewhat pulverulent, ruptured epidermis often overarching, otherwise inconspicuous; urediniospores broadly ellipsoid, obovoid-ellipsoid, or nearly globoid, 23-27 by 27-35 um; wall thin, 1.5-2 um, nearly colorless, finely and rather Sparsely verrucose-echinulate with points about 3 um apart, the pores small, very indistinct, apparently more than 4 and scattered.
III. Telia chiefly hypophyllous, and to some extent on the young branches, scattered, round, 0.3-1 mm. across, soon naked, pulvinate, pale cinnamon-brown, or cinereous by germination, ruptured epidermis inconspicuous; teliospores oblong or obovoid-oblong, 27-32 by 48-63 um, rounded at both ends, or somewhat narrowed below, somewhat constricted at septum; wall pale-brownish, or almost colorless, smooth, thin, 1.5-2 um, usually thicker at apex, 3-6 um; pedicel colorless, or slightly tinted, terete, 6-10 um in diameter, thin-walled, once to twice length of spore.
On Carduaceae: Baccharis consanguinea Greene, California. Baccharis Emoryi A. Gray, Arizona. Baccharis halimifolia, North Carolina; Cuba. Baccharis pilularis DC, California. Baccharis pteronioides DC, Michoacan. Baccharis salicina T. & G., New Mexico. Baccharis sarothroides A. Gray, Arizona. Baccharis thesioides H. B. K., Arizona.
Type locality: San Francisco, California, on Baccharis pilularis.
Distribution: Central California to New Mexico, and southeastward through Mexico and the West Indies: also in South America.
