Browsing by Subject "Flora of Mexico"
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Item (Vol. 01, 1998-05) A Revision of Thenardia H.B.K. (Apocynaceae, Apocynoideae)(1998-05) Williams, Justin K.A revision of the Mexican genus Thenardia H.B.K. is presented. Three species are here recognized: T. chiapensis J. K. Williams, T. floribunda H.B.K., and T. galeottiana Baillon. A complete account of synonymy, and typification is provided, as well as a key to species, photographs of types and pollen, and a distribution map of the species.Item (Vol. 01, 1998-05) Ocotea Heribertoi (Lauraceae), a New Species of Rain Forest Canopy Tree from the Isthmus Of Tehuantepec, Mexico(1998-05) Wendt, TomOcotea heribertoi is a remarkable new species from very high precipitation rain forests of the Chimalapa-Uxpanapa region of the Isthmus of Tehuantepec in Oaxaca and Veracruz, Mexico. It sports the largest known globose fruit within this large genus, borne in an unusual cupule, while the combination of vegetative and floral features indicate that it is apparently not closely related to any described species.Item (Vol. 02, 1999-12) Sterculia Xolocotzii (Sterculiaceae), A New Species Of Rain Forest Canopy Tree From The Isthmus Of Tehuantepec, Mexico(1999-12) Wendt, Tom; Taylor, Elizabeth L.The new species Sterculia xolocotzii represents the second native New World Sterculia species with palmately compound leaves to be described, the first being S. mexicana R. Br. Sterculia xolocotzii is known only from Mexico, where it has been collected in lowland rain forests of the Uxpanapa-Chimalapa region of Veracruz and Oaxaca and once in the Los Tuxtlas area of Veracruz. It can be distinguished from S. mexicana, with which it often grows, by habit, phenology, and numerous morphological characters. The morphology and ecology of S. xolocotzii are detailed, and the distribution and typification of S. mexicana are also discussed.Item (Vol. 06, 2003-12) Peperomia Hobbitoides (Piperaceae), a New Species of Karstophile from the Rain Forests of the Isthmus of Tehuantepec, Mexico(2003-12) Wendt, TomPeperomia hobbitoides is described as a new species from karst rain forests of extreme southeastern Veracruz, Mexico. The new species grows directly on outcrops of karstic limestone, sprouting from corms lying in tiny soil pockets of ledges, depressions, and holes in the rock. It may be distinguished from all previously described species of Peperomia of Mexico and Central America by the combination of the small perennial corm, the broadly ovate acuminate-tipped leaves with cordate bases and campylodromous venation, and the ellipsoid fruit 1.5-2.0 times as long as thick with a distinct narrow apical appendage ca. 0.15-0.3 mm long. The herbage of the new species has a strong fragrance and flavor of fresh coriander (cilantro) and is eaten by inhabitants of the area. Peperomia hobbitoides is most similar morphologically to P. asarifolia Schltdl. & Cham. and P. bernoullii C. DC. but is easily distinguished from both.Item (Vol. 07, 2004-12) A New Species of Mortoniodendron (Malvaceae Sens. Lat.) from the Rain Forests of the Isthmus of Tehuantepec, Mexico(2004-12) Dorr, Laurence J.; Wendt, TomThe taxonomic history, defining characters, and relationships of the genus Mortoniodendron are briefly sketched. Characters that define M. pentagonum, a species known from a limited area in Guatemala, are elaborated. A closely related but distinct species from Veracruz, Mexico, M. uxpanapense Dorr & T. Wendt, is described and illustrated. The new species is considered to be Critically Endangered (CR) under the IUCN red list classification.Item (Vol. 07, 2004-12) Ipomoea Cuprinacoma (Convolvulaceae): A New Morning Glory from Southwestern Mexico(2004-12) Carranza, Eleazar; McDonald, J. AndrewA new species of morning glory from southwestern Mexico, Ipomoea cuprinacoma (Convolvulaceae), is described. The species is assigned to Ipomoea series Arborescentes with other stout lianas and trees, and distinguished from I. populina on the basis of slender stems, canescent peduncles and leaf blades, exclusively axial inflorescences, and long, pale-coppery seed hairs.Item (Vol. 08, 2005-12) Two New Species of Polygala (Polygalaceae) from Western Mexico(2005-12) Wendt, TomTwo new species of Polygala subgenus Polygala (Polygalaceae) are described from western Mexico. Polygala mcvaughii is related to P. subalata, from which it differs by its shorter, broader racemes, longer pedicels, and always annual habit, and to P. conferta, differing from that species by its larger seeds and larger, usually ± non-stipitate fruits. It is known from 1200-2250 m in Michoacan, Jalisco, Aguascalientes, and extreme southern Zacatecas. Polygala tellezii belongs to a group of species in which a reduced or no aril and short seed hairs are the norm, and in which a vegetative vestiture of minute capitate hairs is common. This new species is in some ways morphologically most similar to the South American P. exigua, but it is perhaps most closely related to the sympatric P. glochidiata, from which it differs in its entirely alternate leaves and non-uncinate seed hairs. Polygala tellezii is known only from three localities in lowland savannas in southern Nayarit.Item (Vol.15, 2012-12) Croton Pascualii (Euphorbiaceae S.S.), a New Arborescent Croton with an Accrescent Calyx From the Pacific Slope of Oaxaca, Mexico(2012-12) Lott, Emily J.; Martínez-Gordillo, MarthaA new arborescent species of Croton with accrescent pistillate calyx, Croton pascualii, is described and illustrated from the Pacific Slope of Oaxaca, Mexico. It has certain characteristics in common with Croton oerstedianus, a species included in the section Corylocroton. The proposed new species is characterized by its unisexual cymules, large and broadly ovate imbricate sepals of the pistillate flowers, and capsules ca 12 mm long. The foliage and resin of the new species have a pleasant, persistent aromatic fragrance suggestive of Quararibea or of celery (Apium graveolens). Croton pascualii is thus far known only from the Tropical Moist Semi-Evergreen Forest (selva mediana subperennifolia) of the Pacific Slope of Oaxaca, and has been collected in flower from June to September.Item (Vol.17, 2014-12) A New Species of Mortoniodendron (Malvaceae sens. lat.) from Chiapas, Mexico(2014-12) Ishiki, Mario; Wendt, TomThe new species Mortoniodendron ocotense is described from northwestern Chiapas, Mexico, where it is a locally abundant tree on karst substrates in seasonal evergreen rain forest. It falls within a group with five previously described species, of which the most closely related is M. uxpanapense. A simplified key to the six species is presented.