D. W. & T.Durand, ?Ann. Mus. Congo, Sér. 2, Bot., ser. 2, 1: 44. 1899.?, 1899.

Briq., ?Annuaire Conserv. Jard. Bot. Genève 3: 167. 1899.?, 1899.

Rusby and Rusby, ?Bull. Torrey Bot. Club 26: 194. 1899.?, 1899.

B.  ex Rusby and ex Rusby, B., ?Bull. Torrey Bot. Club 26: 191. 1899.?, 1899.

C.  ex Donn.Sm., ?Enum. Pl. Guatem. 5: 108. 1899.?, 1899.

D. W. & T.Durand, ?Bull. Soc. Roy. Bot. Belgique 38: 209. 1899.?, 1899.

Rusby and Rusby, ?Bull. Torrey Bot. Club 26: 193. 1899.?, 1899.

Greenm., ?Proc. Amer. Acad. Arts 34: 571. 1899.?, 1899.

Rusby, ?Bull. Torrey Bot. Club 26: 190. 1899.?, 1899.

Urb., ?Symb. Ant. 1: 399. 1899.?, 1899.

G.  ex Rusby, ?Bull. Torrey Bot. Club 26: 152. 1899.?, 1899.

Rusby and Rusby, ?Bull. Torrey Bot. Club 26: 192. 1899.?, 1899.

C.Mohr, ?Bull. Torrey Bot. Club 26: 119. 1899?, 1899.

(L. ) Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 53. 1899?, 1899.

(V. ) Comes, Comes,, Comes, (L. ), Comes,, and Comes, (L. ), ?Monographie du Genre Nicotiana 1899?, 1899.

S.Moore, ?Journal of the Linnean Society, Botany 34  1899?, 1899.

Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 13. 1899?, 1899.

(W. L. ) ex Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 10. 1899?, 1899.

(J. A. ) Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 12. 1899?, 1899.

Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 30. 1899?, 1899.

(H. ) Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 25. 1899?, 1899.

Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 29. 1899?, 1899.

(L. ) Comes and Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 46. 1899?, 1899.

Comes and ex Comes, (D. D. C. ), ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 47. 1899?, 1899.

(M. ) Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 21. 1899?, 1899.

(D. D. C. ) ex Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 49. 1899?, 1899.

Comes and Comes, (L. ), ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser 5) 1(1): 49. 1899?, 1899.

Comes, Comes,, and Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 27. 1899?, 1899.

(A. S. - H. ) Comes and Comes, (J. R. ), ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 44. 1899?, 1899.

Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 45. 1899?, 1899.

(M. ) Comes and Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 39. 1899?, 1899.

(C. ) Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 52. 1899?, 1899.

(G. ) Comes, ?Atti Real Ist. Incoragg. Sci. Nat. Napoli (ser. 5) 1(1): 70. 1899?, 1899.

Rusby, ?Bull. Torrey Bot. Club 26: 195. 1899?, 1899.

Donn.Sm., ?Bot. Gaz. 27: 436. 1899?, 1899.

Rusby and Britton, ?Bull. Torrey Bot. Club 26: 196. 1899?, 1899.

(S. ) Urb., ?Symb. Antill. 1: 380. 1899.?, 1899.

Brandegee and Brandegee, ?Erythea 7: 6. 1899?, 1899.

Greenm., ?Proc. Amer. Acad. Arts 34: 572. 1899.?, 1899.

Rusby, Rusby, (D. ), Rusby,, Rusby,, Rusby, (D. ), Rusby,, Rusby,, Rusby, (D. ), and Rusby, ?Bull. Torrey Bot. Club 26: 198. 1899?, 1899.

Rusby and Britton, ?Bull. Torrey Bot. Club 26: 199. 1899?, 1899.

(R. P. )& Rusby, Rusby,, Rusby, (R. P. )&, Rusby,, Rusby, (R. P. )&, Rusby,, and Rusby, ?Bull. Torrey Bot. Club 26: 197. 1899?, 1899.