2 795974 Piper brachypus Trel.
J. Arnold Arbor., vol. 70 : p. 21, fig. 6 (1989) [P. Kernan]

2 796005 Piper brevipedicellatum Bornst.
J. Arnold Arbor., vol. 70 : p. 24, fig. 7 (1989) [P. Kernan]

2 796242 Piper cihuatlanense Bornst.
J. Arnold Arbor., vol. 70 : p. 26, fig. 8 (1989) [P. Kernan]

2 796312 Piper colotlipanense Bornst.
J. Arnold Arbor., vol. 70 : p. 28, fig. 9 (1989) [P. Kernan]

2 797016 Piper guazacapanense Trel. & Standl.
J. Arnold Arbor., vol. 70 : p. 30, fig. 10 (1989) [P. Kernan]

2 797652 Piper mcvaughii Bornst.
J. Arnold Arbor., vol. 70 : p. 32, fig. 11 (1989) [P. Kernan]

2 797693 Piper michelianum C. DC.
J. Arnold Arbor., vol. 70 : p. 33, fig. 12 (1989) [P. Kernan]

2 797788 Piper muelleri C. DC.
J. Arnold Arbor., vol. 70 : p. 36, fig. 13 (1989) [P. Kernan]

2 797904 Piper novogalicianum Bornst.
J. Arnold Arbor., vol. 70 : p. 41, fig. 15 (1989) [P. Kernan]

1 798698 Piper rosei C. DC.
J. Arnold Arbor., vol. 70 : p. 43, fig. 16 (1989) [P. Kernan]

2 799615 Piper yucatanense C. DC.
J. Arnold Arbor., vol. 70 : p. 49, fig. 18 (1989) [P. Kernan]