Lamourouxia macrantha Martens & Galeotti. Bull. Acad. Roy. Sci. Bruxelles, 1845

Francisco-Gutiérrez, Antonio, Ruiz-Sanchez, Eduardo, González, Dolores & Lira-Noriega, Andrés, 2023, Lamourouxia (Orobanchaceae) of Mexico, Phytotaxa 582 (1), pp. 1921-1935 : 1921-1935

11. Lamourouxia macrantha Martens & Galeotti. Bull. Acad. Roy. Sci. Bruxelles 12(2): 32. 1845. Lectotype designated here:— MEXICO. Pic d’Orizaba, 1840, 8000–9500 pieds, H. Galeotti 1104 (Lectotype: BR0000005424023 !; isolectotype: G00356760!)

Figure 9 A–E .

Herbs up to 120 cm tall, stems mostly solitary, rarely branched at base, erect, herbaceous, hirsute, non-glandular. Leaves sessile, petiolate, petioles 2–8 mm long, broadly ovate, 20–90 × 12–45 mm, margin crenate to doubly serrate, 13–26 teeth per side, teeth 0.4–5 mm long; apex obtuse, base rounded; membranous, pilose, non-glandular. Inflorescence a raceme, erect, pedicels thin and slightly curved, 9–21 mm long. Bracts equal along inflorescence, sessile, linear or narrowly ovate to ovate, 10–55 × 7–25 mm, margin serrate to doubly serrate, apex obtuse, base rounded to auriculate. Calyx campanulate without dots on the surface, 10–26 × 5–17 mm, lobes ovate to slightly spatulate, 5–12 × 3–5 mm, apex aciculate, pilose, non-glandular. Corolla funnelform, prominently curved and ventricose, 25–70 × 9–22 mm, upper lip 8–30 × 9–20 mm, lower lip 5–26 × 3–5 mm, arching forward, lobes 4–6 × 2.5–5 mm; orange to red, pubescent, non-glandular. Stamens exserted 4, filaments up to 65 mm long, anthers 3–5 mm long, style up to 77 mm long, stigma capitate, 2 mm width. Capsule ovoid, 8–15 × 7–10 mm, glabrous. Seeds not seen.

Etymology: —The name of the species refers to its large flowers.

Distribution and habitat: —This species is distributed from Mexico to Guatemala. In Mexico, it can be found in the states of Chiapas, Guerrero, Guanajuato, Jalisco, Oaxaca, Querétaro, and Veracruz in elevations from 2500 to 3000 m ( Fig. 9E ). The species can be located mainly in pine-oak, pine ( Pinus patula Schlechtendal & Chamisso (1831: 354) , and Abies Miller (1754 : s.n.) forests in eastern Mexico.

Phenology: —The flowering and fruiting season of this species occur from August to January. The peak of collections is from August.

Nomenclatural notes: —The original description of Lamourouxia macrantha ( Martens & Galeotti 1845) cited the collections Galeotti 994 and Galeotti 1104 without herbaria location. From both collections, the specimen with representative structures as mature and open flowers and best preservation is Galeotti 1104 BR0000005424023, designated as lectotype.

Examined specimens: MEXICO. Chiapas: Unión Juárez, Tacaná , August 1938, Matuda 2335 (MEXU!). Durango: Metates , north of cueva, 2600 m, 29–30 August 1934, Pennell 18452 ( US!). Guanajuato : Tierra Blanca, parte alta del Cerro Zamorano, 3200 m, 22 September 2002, Rzedowski 54019 (XAL!). Guerrero: Tlacotepec, Cerro Teotepec , 3200 m, 10 August 1964, Rzedowski 18581 (ENCB!, MEXU!, US!). Jalisco : Zapotitlán de Vadillo , subida al Parque Nacional Nevado de Colima, October 2008, González 207 (IBUG!); northern slopes of the Nevado de Colima, above Canoa de Leoncito, 3100–3300 m, 10 September 1952, McVaugh 12854 (MEXU!, US!). Oaxaca : Ixtlán de Juárez , Llano de las Flores, Atepec, 18 October 1969, MacDougall s.n. (ENCB!); 17 km al N de Ixtlán, carr. OaxacaTuxtepec, 27 August 1986, Torres & Cortés 8700 (MEXU!, US!, XAL!). Miahuatlán , San Agustín, 05 August 1996, Hinton et al. 26755 (GBH!). Oaxaca , aux bords des ruisseaux du Cerro San Felipe, près d’Oaxaca , 1840, 8000–9000 pieds, Galeotti 994 (BR!, G!); upper southern slopes of Cerro San Felipe , trail from town of San Felipe del Agua, 2 miles north of Oaxaca, 05 November 1966, Anderson & Laskowski 4127 (ENCB!). Santa María Tlahuitoltepec, vicinity of Cerro Zempoaltepetl , southeast slopes of peak, 2900–3100 m, 10 August 1950, Hallberg 907 (ENCB!, MEXU!, US!). Zacatepec , subida al Cerro Zempoaltépetl por el crucero a Zacatepec, 2650 m, 18 September 1988, Torres & Martínez 12502 (XAL!). Sierra de San Felipe , 10000 ft, 04 August 1894, Pringle 4762 (P!, US!), 29 August 1894, Pringle 4854 (P!, US!). Puebla : Tesmalaquilla, below Tesmalaquilla, 5500 ft, 24 August 1938, Balls 5335 ( US!). Querétaro: Colón , Cerro Zamorano, 1 km al SW de la cumbre, 3100 m, 13 November 1971, Rzedowski & McVaugh 408 (ENCB!); parte alta del Cerro Zamorano , 3250 m, 01 September 1987, Rzedowski 44452 (ENCB!, IBUG!, XAL!). Pinal de Amoles, San Gaspar, 2850 m, 13 October 1989, Zamudio et al. 7468 (IBUG!). Pinal de Amoles , 1 km al SE de El Llano de San Francisco, 2600 m, 15 August 1990, Carranza 2642 (MEXU!, XAL!). Veracruz: Calcahualco, Nuevo Vaquería, 3050 m, 01 August 2017, Jiménez & García-Gutiérrez 1 (XAL!, XALU!), Vaquería del Jacal, 10000 ft, September 1841, Liebmann 9390 (L!, US!). Xico, Carretera de Tembladeras hacia Las Carabinas, 3050 m, 03 September 2019, Francisco-Gutiérrez et al. 255 (IBUG!, MEXU!, XAL!).

Figures

FIGURE 9. Lamourouxia macrantha. A) Habit. B) Lateral view of a flower. C) Detail of fruits. D) Leaves. E) Distribution map. Lamourouxia microphylla. F) Dry Inflorescence. G) Dry leaves. H) Distribution map. Credits in Appendix I.