?Sp. Pl.  396, 1753?. Submitted.

?Fl. N. Mitt.-Deutschland, ed. 4 2: 222, 1858?. Submitted.

?Seznam 82, 1852?. Submitted.

?Amer. Midl. Naturalist 7(4-5) : 134, 1921?. Submitted.

?Autik. Bot. 104, 1840?. Submitted.

?Fl. Baical.-dahur. 2: 213, 1846?. Submitted.

?Monatsber. Konigl. Preuss. Akad. Wiss. Berlin 1857: 14, 1857?. Submitted.

?Amer. Midl. Naturalist 7(4-5) : 134, 1921?. Submitted.