Lamourouxia microphylla Martens & Galeotti. Bull. Acad. Roy. Sci. Bruxelles 1845
Creators: name: Francisco-Gutiérrez, Antonio
name: Ruiz-Sanchez, Eduardo
name: González, Dolores
name: Lira-Noriega, Andrés
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Orobanchaceae
Lamourouxia
Lamourouxia microphylla

description: 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!).
description: Published as part of Francisco-Gutiérrez, Antonio, Ruiz-Sanchez, Eduardo, González, Dolores & Lira-Noriega, Andrés, 2023, Lamourouxia (Orobanchaceae) of Mexico, pp. 1921-1935 in Phytotaxa 582 (1) on pages 1921-1935, DOI: 10.11646/phytotaxa.582.1.1, http://zenodo.org/record/7609060