Triumfetta acahuizotlanensis Gonz.-Martínez, J. Jiménez Ram. & Rios-Carr.
Descripción
Trees 3–7 m tall, outer bark maculate light brown and dark brown. Stems brownish green while young, with abundant lenticels, glabrescent, short-stellate pubescence, yellowish white, with minute yellow-orange glands, the mature stems light brown to white-yellow, glabrescent, with rhomboid striations, and minute black glands when dried. Leave blade 3.8–13 × 3.5–11.2 cm, subquadrate, sometimes elliptic, equilateral, the margin serrate-dentate, trilobed at the apex, with divergent lateral lobes, the apices caudate, the base obtuse or cuneate with 2 basal teeth on each side with cupuliform glands, coriaceous, yellowish green, the upper side of leaves light green, young leaves with simple hairs, with minute whitish glands, the adaxial side of the mature blade light green, glabrate, the abaxial sides of the blade pale green, glabrate, midveins 5–7 (–9—in this case there are 2 basal inconspicuous nerves) which present minute yellow glands, on both the adaxial and abaxial sides of the blade, with scattered and short stellate trichomes, in addition to simple trichomes on the base of the underside, although they are scattered along the veins; petioles 1.1–9 cm × 0.5–1.7 mm, green or brownish red, with abundant minute yellowish glands, glabrescent or with sparse stellate trichomes; stipules lanceolate, 4.1–6.9 mm long, caducous, with abundant minute glands, simple and stellate trichomes sparse. Cymes highly branched, 6.8–20.5 cm long, terminal or axillary on the last leaf of the branch, the subtending leafy bracts, 2–5.4 × 0.4–1.9 cm, ovate-elliptic or lanceolate, the margin serrate-dentate, the apex caudate, the base attenuate or cuneate, with 1–4 cupuliform glands on the basal teeth; peduncles of dichasium 2.3–8.4 mm long, with short-stellate pubescence; pedicels (1-) 2.4–5.5 mm long, articulated at ¼ of the length above the base, with short-stellate pubescence; bracteoles at the base of the pedicels, membranous, ca. 0.4 mm long, brown-orange; dichasia (2-) 4-5 at each node, evenly scattered along the branches. Flowers bisexual, the buds cylindrical, 1.6–2.7 × 1.1–1.6 mm while in pre-anthesis; calyx tetramerous, sepals 5–5.9 × 1.1–1.4 mm, spathulate, green, the inner side glabrate, the outer side with minutely pubescent and sparse stellate trichomes and minute glands on the surface, the base truncate, the apex acute rounded with simple sub-apical appendices 0.4–0.5 mm long; corolla tetramerous, the petals 3.5–4.2 × 0.8–0.9 mm, spathulate, white, the margins with hyaline trichomes at the base, the apex acute-rounded or slightly oblique, the base truncate; androgynophore 0.9–1 mm long, with 4 glands, oblong, white-yellowish, ring of ca. 0.3 mm long, ciliate; stamens 30 the filaments white, filiform, 2–4.2 mm long, the anthers dithecal, 0.5–0.7 mm long, longitudinally dehiscent, versatile, with an orange spot at the point of attachment; ovary 0.6 × 0.4 mm, ovoid, white, muricate, with (3) 4 locules, 1 ovule per locule, spinules with white base and hyaline apex; style 1.4–1.7 mm long, inserted, the stigma bifid, with papillose glands. Capsules 2.1–3 mm diameter at maturity, indehiscent, pyriform, (3) 4 locular, all the surface with uncinated spinules, light brown to grey, with minute black glands, glabrate; spinules 22–26 (–30), 4–5.8 mm long, reddish-orange, hyaline at the apex, glabrate. Seeds 4, rarely 3, 2.8–3.2 × 1.4–2.2 mm, pyriform, one seed per locule, dark red at the base and black along the edges.A
Distribución
México (país) EndémicoA
Elevación
800 – 822 mA
Ecología y Hábitat
This species has only been found in the area around Acahuizotla, in the municipalities of Chilpancingo de los Bravo and Mochitlán, in the state of Guerrero, Mexico. The habitat is tropical semi-deciduous forest, on the west slope of Cerro El Sombrerito and Cerro El Palmar. The population is reduced and scarce, although individuals are abundant at the base of Cerro El Sombrerito. It is associated with Astronium graveolens Jacq. (Anacardiaceae), Jacaratia mexicana A.DC. (Caricaceae) and Peltogyne mexicana Martínez (Fabaceae). It flourishes in rocky soils and the leaves exhibit severe damage due to herbivory. It flowers from September to October and bears fruit in December-January.A
Categoría IUCN
En peligro crítico (CR)B
Categoría NOM-059-SEMARNAT-2010
No incluidaC