Two new subspecies of Quararibea yunckeri (Bombacaeae) from Edo. Veracruz, Mexico

Descriptions are given of two new taxa, Quararibea yunckeri subsp. sessiliflora, and Q. yunckeri subsp. veracruzana, with summaries of their distributions. To facilitate the publication of a treatment of Bombacaceae for the Flora of Veracruz (Avedafio Reyes, in prep.), brief descriptions are presented of two new subspecies within the genus Quararibea Aublet (Bombacaceae). The genus (exclusive of the closely related Matisia Humboldt & Bonpland) comprises approximately 30 species of wet and moist forest trees that occur from southern Mexico and the Antilles to southeastern Brazil, northern Bolivia, and Peru (Alverson, 1986). A forthcoming synopsis of Mesoamerican Quararibea will provide keys and additional information for the subspecies discussed here (Alverson, in prep.). Quararibea yunckeri Standley, in Yuncker, Field Mus. Nat. Hist. (Bot.) 9(4): 306-307. 1940. TYPE: Honduras. Depto. Atlintida: river bank, foothills back of La Ceiba, 25 June 1938, Yuncker, Koepper & Wagner 8010 (holotype, F; isotypes, BM, F, GH, LL, MO, S). Quararibea yunckeri Standley subsp. sessiliflora Miranda ex W. S. Alverson, subsp. nov. TYPE: Mexico. Edo. Veracruz: Estaci6n Biol6gica Los Tuxtlas, San Andrds Tuxtla, 120 m alt., 9 Dec. 1969, Martinez C. 2122 (holotype, MEXU; isotypes, ENCB, F, GH, MO, UC). Subspecies haec a Quararibea yunckeri Standley subsp. yunckeri differt foliis acarodomatiis nullis. Tree, (3-)6-15(-20) m tall. Petioles 5-22 mm long. Leaf blades elliptic, 6-18 cm long, 2-7 cm wide, the apex acute to acuminate, the base cuneate to rounded or truncate, nonbarbate beneath. Flowers solitary and opposite the leaves, or more commonly clustered on short, often leafless, axillary shoots, or on other leafless portions of the young branches, the flowering pedicels 2-4 mm long, bearing 3 triangular bracteoles. Calyx 6-10 mm long, ca. 4 mm diam. at mouth, without longitudinal wings or ridges. Corolla actinomorphic, the petals spatulate to narrowly spatulate, reflexed at anthesis, 11-16 mm long and 2-3 mm wide when dry, white when fresh. Staminal column cylindric, 11-17 mm long (including the 5 short teeth at summit), 2-4 mm diam. across middle of lobes when dried. Style fili orm, 12-21 mm long, ca. I mm diam. near apex, exce ing the staminal lobes by 1-2 mm. Fruits ellipsoid, 13-23 mm long and 10-16 mm diam. when mature and dried, bluntly mammilate for 23 mm. Paratypes. MEXICO. Veracruz: Lado SE de Lago Catemaco, arriba de Rio Cuetzalpan, 600 m alt., 25 Oct. 1971, Beaman 5167 (F, GH, MEXU, US); Poblado de Laguna Escondida a 5 km de la estaci6n de biologfa tropical L s Tuxtlas, San Andr~s Tuxtla, 18035'N, 95005'W, 300 m alt., 24 Aug. 1974, Calzada 1456 (ENCB, F, MEXU), 18 Oct. 1974, Calzada 1580 (ENCB, MEXU, NY). Quararibea yunckeri Standley subsp. veracruzana W. S. Alverson, subsp. nov. TYPE: Mexico. Edo. Veracruz: Sta. Ana Atzacan al N de Orizaba, 51-B-2 [sic], a orillas de la poblaci6n, 1360 m alt., 18 Feb. 1967, Rosas R. 190 (holotype, MEXU; isotypes, A, ENCB, LL, MO, UPS). Subspecies haec a Quararibea yunckeri Standley subsp. yunckeri differt pedicellis floriferis longioribus (8-14 mm longis vs. 2-6 mm longis). Small tree, 6-12 m tall. Petioles 5-12 mm long. Leaf blades elliptic, usually slightly asymmetric, 616 cm long, 2-6 cm wide, the apex acute to acuminate to short-caudate, the base cuneate to rounded to truncate and often slightly oblique, very conspicuously barbate beneath. Flowers unknown. Fruiting pedicels (8-)11-14 mm long, bearing 2-3 persistent bracteoles on the basal V. Calyx shallowly cupulate, its margins tearing and broadly spreading away from the base of the fruit when dried, 7-11 mm long, longitudinally subrugose. Fruits ellipsoid to broadly ovate, 15-18 mm long and 13-19 mm diam. when dried, 1or 2-seeded, frequently asymmetric, the apex bluntly mammilate. NovON 8: 127-128. 1998. This content downloaded from 207.46.13.85 on Fri, 18 Nov 2016 04:27:52 UTC All use subject to http://about.jstor.org/terms