Magnolia

Domínguez-Yescas, Reyna & Vázquez-García, J. Antonio, 2019, Flower of the heart, Magnolia yajlachhi (subsect. Talauma, Magnoliaceae), a new species of ceremonial, medicinal, conservation and nurse tree relevance in the Zapotec culture, Sierra Norte de Oaxaca, Mexico, Phytotaxa 393 (1), pp. 21-34 : 22-23

Key to Mexican species of Magnolia (section Talauma subsection Talauma ) Magnoliaceae

1. Flower buds 3.5–4.0 cm long; occurring only in Hidalgotitlán, Veracruz ........................................................................................... .................................................................................................... Magnolia wendtii Vázquez in Vázquez-García et al. (2013b: 482).

- Flower buds 8.0–12.0 cm long; not present in Hidalgotitlán, Veracruz ..............................................................................................2

2. Abaxial portions of carpels detaching from fruit axis and falling mostly in large irregular many-carpellate (> 15) masses; Chiapas (Ocozocuautla) ............................. Magnolia perezfarrerae Vázquez & Gómez-Donínguez in Vázquez-García et al. (2013a: 417).

- Abaxial portions of carpels detaching from fruit axis and falling mostly singly, occasionally in few-carpellate (<8) masses; not in Ocozocuautla, Chiapas ......................................................................................................................................................................3.

3. Leaves mostly lanceolate to broadly lanceolate................................................................................................................................4.

- Leaves mostly elliptic to obovoid......................................................................................................................................................5.

4. Carpels 20–28, 1.8–3.75 × 1.7–2.1 cm, lateral walls of carpels curved outward, resembling wings .................................................. ........................................................................................... Magnolia sinacacolinii Vázquez in Vázquez-García et al. (2012b: 120).

- Carpels 30–35, 3.4–5.0 × 1.7–2.1 cm, lateral walls of carpels not curved outward............................................................................. ....................................................................................... Magnolia lopezobradorii Vázquez in Vázquez-García et al. (2012b: 110),

5. Leaves obovate; known only from San Pedro Ixcatlán, Oaxaca .......................................................................................................... ..................................................................... Magnolia decastroi Vázquez & Muñiz-Castro in Vázquez-García et al. (2013b: 463).

- Leaves mostly elliptic, not present in San Pedro Ixcatlán, Oaxaca...................................................................................................6.

6. Petals adaxially purplish in the apical ¾...........................................................................................................................................7.

- Petals adaxially white throughout.....................................................................................................................................................8.

7. Fruit oblongoid; Zongolica y Córdoba, Veracruz ................................................................................................. Magnolia mexicana

- Fruit spheroidal; Volcán Santa Martha, Veracruz ...................................................................................... Magnolia zoquepopolucae

8. Fruit ovoid to obovoid or ellipsoid....................................................................................................................................................9.

- Fruit globose to subglobose or widely ovoid..................................................................................................................................11.

9. Flowers 20–22 cm in diameter, fruit ellipsoid, basal carpels decurrent to a length of 0.4–0.6 cm long; Sierra de Manantlán , Jalisco / Colima .................................................................. Magnolia jaliscana Vázquez & Guzmán in Vázquez-García et al. (2012b: 108) .

- Flowers 13–17 cm in diameter; fruit pear-shaped to ovoid; basal carpels decurrent to a length of 1.0–2.0 cm long; not in the Sierra de Manantlán, Jalisco / Colima .........................................................................................................................................................10.

10. Leaves 35–45 × 23–29 cm, flower diameter 13–14 cm, split of the carpel apex (1/3–1/2); occurring only in Talpa de Allende , Jalisco ........................................................................ Magnolia ofeliae Vázquez & Cuevas in Vázquez-García et al. (2013b: 470) .

- Leaves 18–38 × 8–23 cm; flower diameter 16–17 cm; split of the carpel apex (2/3–3/3), present in southern, Oaxaca .................... ............................................................................. Magnolia macrocarpa (Zuccarini 1836: 369) Vázquez-García et al. (2013: 466) .

11. Carpels 61–70, inconspicuously marked; seeds scarlet; Selva Lacandona, Chiapas ...................................... Magnolia lacandonica

- Carpels 36–41, conspicuously marked; seeds orange to pale red; northern Oaxaca .................. Magnolia yajlachhi , here described.