Let $R$ be an arbitrary ring and $T$ be a submodule of an $R$-module $M$. A submodule $N$ of $M$ is called $T$-small in $M$ provided for each submodule $X$ of $M$, $Tsubseteq X+N$ implies that $Tsubseteq X$. We study this mentioned notion which is a generalization of the small submodules and we obtain some related results.
Three new records of Tanacetum L., namely, T. punctatum and T. zahlbruckneri from Azerbaidjan and T. vulgare from Mazandaran Provinces are reported for the first time from Iran. Illustrations and distribution map are also presented for each species.
