10 A.O. TUCKER AND J. JANICK
(a) (b)(c)Fig. 1.4. Eryngiumsp.: (a) fol. 16v; (b) inflorescence ofE. heterophyllum(Courtesy of
Blooms of Bressingham®); (c) leaves ofE. comosumR. Delaroche illustrating anthocyanin
accumulation (Courtesy of Pedro Tenorio-Lezama).
possibly the Mexican species Gonolobus chloranthus Schltdl.
(Fig. 1.5b). The tlalayotliin the Florentine Codex (Sahagun 1963: ́
pl. 488a) with a similar illustration of the fruit (but with smooth ribs)
is nominally accepted as the related speciesG. erianthusDecne., or
calabaza silvestre. The roots ofG. niger(Cav.) Schult. are used today in
Mexico to treat gonorrhea (Gonz ́alez Stuart 2004).