[P]

“Smithsonian Contributions to Knowledge,” v. p. 53.

[Q]

“Wiegmann Archiv.” 1835, ii. p. 354; “Ann. Nat. Hist.” 1841, 405.

[R]

Leidy, “Proc. Acad. Nat. Sci. Phil.” 1851, p. 204.

[S]

“Gardener’s Chronicle,” November 21, 1868.

[T]

Corda, “Prachtflora,” pl. ix.