Tilletia walkeri (Ustilaginales: Tilletiaceae) is described as a new species of partial bunt infecting Lolium multiforum, annual ryegrass, and L. perenne, perennial ryegrass in the United States and Australia, respectively. The new species is characterized by large, tuberculate teliospores with the exospore ornamentation comprised of incompletely cerebriform ridges in surface view. Teliospores of T walkeri are compared with those of T indica and other similar species of Tilletia, and the issue of Neovossia versus Tilletia is discussed. A key is provided to smuts known to occur on species of Lolium.
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Univ Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, Argentina
Yanniccari, Marcos
Istilart, Carolina
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CEI Barrow MAA INTA, RA-7500 Tres Arroyos, ArgentinaUniv Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, Argentina
Istilart, Carolina
Gimenez, Daniel O.
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Univ Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, Argentina
Univ Nacl La Plata, Coll Agron & Forestry, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, Argentina
Gimenez, Daniel O.
Castro, Ana M.
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Univ Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, Argentina
Univ Nacl La Plata, Coll Agron & Forestry, RA-1900 La Plata, Buenos Aires, ArgentinaUniv Nacl La Plata, CONICET, Inst Plant Physiol INFIVE, RA-1900 La Plata, Buenos Aires, Argentina