Ternstroemia, Linnaeus f., 1782

Alcántara-Ayala, Othón, Maradiaga-Ceceña, Francisco S., Luna-Vega, Isolda & Alvarado-Sizzo, Hernán, 2022, Ternstroemia guerrerensis (Pentaphylacaceae), a new endangered cloud forest tree from Guerrero, Mexico, Phytotaxa 561 (2), pp. 162-172 : 170

Key to the species of Ternstroemia of the Mexican state of Guerrero

1. Leaves spathulate, apex generally rounded or obtuse, base strongly attenuate; inconspicuous secondary venation above. External sepals with eglandular margin ....................................................................................................................... T. lineata subsp. lineata l. Leaves oblong-elliptic, oblong-obovate, or obovate, apex acute or obtuse, sometimes acuminate, base attenuate; inconspicuous venation or slightly impressed above. External sepals with glandular-denticulate margin................................................................2

2. Leaves chartaceous or slightly coriaceous, oblong-elliptical, 2–3 cm wide ...................................................................... T. sylvatica

2. Leaves strongly coriaceous, oblong-obovate, or obovate, 2.6–5 cm wide.........................................................................................3

3. Apex obtuse or rounded, sometimes acuminate. Pedicels 20–30 mm long .................................................................... T. tepezapote

3. Apex acute or obtuse, generally retuse. Pedicels 16–19 mm long .............................................................................. T. guerrerensis