S.Knapp, ?Ann. Missouri Bot. Gard. 73: 739. 1987 [1986].?, 1987.

S.Knapp, ?Ann. Missouri Bot. Gard. 73: 742. 1987 [1986].?, 1987.

S.Knapp, ?Ann. Missouri Bot. Gard. 73: 738. 1987 [1986].?, 1987.