Lamourouxia (Orobanchaceae) of Mexico Author Francisco-Gutiérrez, Antonio 0000-0003-2013-9811 Red de Biodiversidad y Sistemática, Instituto de Ecología A. C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, México. antoniofco 52 @ gmail. com; https: // orcid. org / 0000 - 0003 - 2013 - 9811 antoniofco52@gmail.com Author Ruiz-Sanchez, Eduardo 0000-0002-7981-4490 Departamento de Botánica y Zoología, Centro Universitario de Ciencias Biológicas y Agropecuarias (CUCBA), Universidad de Guadalajara, Camino Ing. Ramón Padilla Sánchez 2100, Nextipac, 45200, Zapopan, Jalisco, México. ruizsanchez. eduardo @ gmail. com; https: // orcid. org / 0000 - 0002 - 7981 - 4490 ruizsanchez.eduardo@gmail.com Author González, Dolores 0000-0001-9010-2833 Red de Biodiversidad y Sistemática, Instituto de Ecología A. C. dolores. gonzalez @ inecol. mx; https: // orcid. org / 0000 - 0001 - 9010 - 2833 dolores.gonzalez@inecol.mx Author Lira-Noriega, Andrés 0000-0003-2013-9811 Red de Biodiversidad y Sistemática, Instituto de Ecología A. C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, México. antoniofco 52 @ gmail. com; https: // orcid. org / 0000 - 0003 - 2013 - 9811 & Red de Estudios Moleculares Avanzados, Instituto de Ecología, A. C. aliranoriega @ gmail. com; https: // orcid. org / 0000 - 0002 - 3219 - 0019 * Corresponding author & Red de Biodiversidad y Sistemática, Instituto de Ecología A. C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, México. antoniofco 52 @ gmail. com; https: // orcid. org / 0000 - 0003 - 2013 - 9811 antoniofco52@gmail.com text Phytotaxa 2023 2023-01-31 582 1 1921 1935 http://dx.doi.org/10.11646/phytotaxa.582.1.1 journal article 10.11646/phytotaxa.582.1.1 1179-3163 7609060 12. Lamourouxia microphylla Martens & Galeotti. Bull. Acad. Roy. Sci. Bruxelles 12(2): 31. 1845. Lectotype designated here:— MEXICO . Oaxaca , bois de l’O d’Oaxaca, 1840, H. Galeotti 1005 ( Lectotype : K000533709!; isolectotypes: BR0000005423378!, BR0000005423705!, G00356756!, K000533710!, P02976340!, P02976341!) = Lamourouxia parvifolia Bentham. Prodr. 10: 542. 1846. Lectotype designated here:— MEXICO . Oaxaca , bois de l’O d’Oaxaca, 1840, H. Galeotti 1005 ( Lectotype : K000533709!; isolectotypes: BR0000005423378!, BR0000005423705!, G00356756!, K000533710!, P02976340!, P02976341!). Figure 9 F–H . Herbs up to 100 cm tall, stems branched along the plant, erect, woody, glabrescent non-glandular. Leaves opposite, petiolate, petioles up to 1 mm long, linear to oblanceolate, 6–10 × 2–3 mm , minutely crenate, 1–6 teeth each side, teeth up to 1 mm long; apex obtuse to rounded, base attenuate; apparently membranous, glabrous. Inflorescence a raceme, erect, pedicels thin, 2–5.7 mm long. Bracts equal along inflorescence, sessile, linear to narrowly lanceolate, 2.1–5.8 × 0.6–1 mm , sometimes with one lobe per side, up to 1 mm long, margin entire, apex acute to obtuse, base attenuate. Calyx campanulate without dots on the surface, 5–7 × 3–4 mm , four-lobed, lobes very reduced, triangular, 1–3 × 1 mm , margin entire, apex obtuse, glabrous. Corolla tubular, 35–41 × 5–6 mm , bilabiate, upper lip 15–18 × 4–5 mm , lower lip 10–16.1 × 2.3–7 mm , apex three-lobed, lobes 1.6–2.4 × 0.9 mm ; red, pubescent, non-glandular. Stamens exserted 2, filaments not seen, anthers 3 mm long. Style 29.3–29.7 mm long, stigma 1 mm long. Fruit a capsule, spheric, 5–6 mm diameter, glabrous. Seeds not seen. Etymology: —The name of the species refers to its small leaves. Distribution and habitat: —This is an endemic species from Mexico . It is distributed in the states of Guerrero and Oaxaca ( Fig. 9H ). The species is present in pine forests and pine and oaks forests. The elevation recorded for this species is 1830–2290 m . Nomenclatural notes: —The original description of Lamourouxia microphylla ( Martens & Galeotti 1845 ) cited the collections Galeotti 1005 with no herbarium location. Ernst (1972) cited five specimens , one in G, two in BR and K. Here, the specimen K000533709 with a branched stem, numerous small leaves, and open flowers has the best representation of the diagnostic features of the species. Other specimens have a few flowers and leaves. Phenology: —The flowering and fruiting season of Lamourouxia microphylla is from August to November. The flowers were mainly collected in October. Examined specimens: — MEXICO . Guerrero : Chilapa , 24 km al E de Chilapa , 06 November 1983 , Tenorio & Ramamoorthy 4868 ( MEXU !) . Leonardo Bravo , Carrizal de Bravo , 6 km después, camino a Chichihualco , 2200 m , 24 August 1997 , Cruz-Durán 1484 ( MEXU !) . Oaxaca : San Jerónimo Coatlán , Campamento San Mateo , 14 km al oeste de san Jerónimo , Hernández-Magaña et al. 5146 ( MEXU !, MO ). San Pablo Cuatro Venados , 15 km northwest of Zaachila on road to San Miguel Peras , 11 November 1983 , Breedlove & Almeda 60114 ( ENCB !, IBUG !). Zimatlán , Paraje Tierra Blanca , 8 km al SE de La Cofradía , comunidad de San Pedro El Alto , 2360 m , 27 October 1998 , Miranda & Hernández 522 ( MEXU !) ; base of Sierra de Clavellinas , 19 October 1894 , Pringle 6000 ( ENCB !, MEXU !, MO, P!, US !).