Tzeltalia, E. Estrada & M. Martinez, 1998

Durán, Ramiro Cruz, 2024, Tzeltalia graciellae (Solanaceae), a new species from the states of Guerrero and Oaxaca, Mexico, Phytotaxa 653 (2), pp. 188-192 : 191

Key to the known species of Tzeltalia (adapted from Martínez & Vargas, 2005).

1. Calyx distinctly lobed, the lobes (2) 7‒10 mm long .................................................................................................... T. amphitricha

1. Calyx truncate, or if lobed, the lobes 3 mm long or less.

2. Corolla white, 1.5‒3 cm in diameter; plants of cloud forest ............................................................................................. T. calidaria

2. Corolla yellow to greenish-yellow or white-purple, 1‒1.7 cm in diameter; plants of pine or oak forestsor matorral.

3. Flowers per fascicle(1‒)2‒5 ; pedicels 5 mm long; calyx terete, 3 cm long; fruit 1 cm in diameter; leaf margin slightly revolute; pine forest; Chiapas ................................................................................................................................................................ T. esenbeckii

3. Flowers per fascicle (4–)6–10(–11) ; pedicels 10–16 mm long, fruting calyx spheric, 0.45–0.7 cm long; fruit 0.3–0.6 cm in diameter; leaf margin plane; pine or oak forests; Guerrero and Oaxaca ......................................................................................... T. graciellae