Four new Brazilian species of Lonchocarpus (Leguminosae, Papilionoideae, Millettieae)

Lonchocarpus castaneifolius, L. grazielae, L. longiunguiculatus, and L. montanus from Brazil are described and illustrated based on field and herbarium studies. The first species belongs to Lonchocarpus sect. Punctati and is restricted to northeastern Brazil (Bahia state). The other three are included in sect. Laxiflori. Lonchocarpus grazielae is restricted to the southern coastal region (Santa Catarina state), L. montanus is found in northeastern Brazil (Bahia and Piauí states), the west-central region (Goiás and Tocantins states) and the southeast (Minas Gerais state), and L. longiunguiculatus occurs in northeastern (Bahia state) and southeastern (Minas Gerais state) Brazil.     

Zapoteca quichoi (Leguminosae, Mimosoideae), a new species from southeastern Mexico

Zapoteca quichoi, a new species endemic to southern Tabasco, Mexico, is described and illustrated. This species exhibits morphological characteristics that place it within subgenus Amazonica, together with Z. amazonica and Z. microcephala, from Peru and Colombia, respectively.

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Resumen  Se describe e ilustra Zapoteca quichoi (Leguminosae, Mimosoideae), una nueva especie de Tabasco, México. Esta especie exhibe características morfológicas que la ubican dentro del subgénero Amazonica, junto con Z. amazonica y Z. microcephala, especies nativas de Perú y Colombia respectivamente.

     

A new species of Dalea series Compactae (Leguminosae: Amorpheae) from northwestern Chihuahua,Mexico

Dalea janosensis, a new species from the northwestern periphery of the Mexican state of Chihuahua, is described and illustrated. It belongs to Dalea subgenus Dalea section Kuhnistera series Compactae and is morphologically similar to Dalea searlsiae, from which it differs in having a greater number of leaflets pairs, shorter peduncles, shorter spikes, persistent bracts, and shorter flowers.     

Calliandra dolichopoda and C. cualensis (Leguminosae, Mimosoideae), two new species from Mexico

Calliandra dolichopoda and C. cualensis, two species endemic to Guerrero and Jalisco, Mexico, respectively, are described and illustrated. Both species appear to be closely related to C. hirsuta.

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Resumen  Se describen e ilustran Calliandra dolichopoda y C. cualensis, dos especies endémicas de Guerrero y Jalisco, México, respectivamente. Ambas especies parecen estar relacionadas con C. hirsuta.

     

A new species of Sechium sect. Frantzia (Cucurbitaceae, Sicyeae, Sicyinae) from Mexico

Sechium mexicanum is described as a new species ofSechium sect.Frantzia. It differs from the remaining species of the section by several features of the inflorescences and staminate flowers, the obovoid and completely unarmed fruits, and pollen grains with 9–10 narrow, poorly defined colpi. It is endemic to Mexico and the first member of sect.Frantzia to be recorded outside of Central America. It grows at 900–2300 m in mesophilous forests and in oak and pineoak forests in the states of Hidalgo, Puebla, Querétaro, and Veracruz.     

The taxonomy of some Swartzieae (Leguminosae, subfam. Papilionoideae) from southeastern brazil

Three new species of Swartzieae are described and illustrated:Swartzia alternifoliolata, S. capixabensis, andZollernia cowanii. Swartzia apetala var.blanchetii and var.subcordata are considered to be synonyms ofS. apetala var.apetala, andS. grazielana a synonym ofS. macrostachya var.macrostachya. Keys to southeastern Brazil members ofSwartzia andZollernia are provided.     

Zornia subsessilis (Leguminosae: Papilionoideae: Dalbergieae), a new species from Serra do Cabral, Minas Gerais, Brazil

Zornia subsessilis, a new species from Serra do Cabral, Minas Gerais State, Brazil, is described and illustrated on the basis of field and herbarium studies. It belongs to Zornia section Zornia of subgenus Zornia and it appears to be restricted to “campo rupestre” (rocky fields) within the “cerrado” biome. This new species is characterized by its sessile to subsessile leaves, fruits with articles 4 to 5 mm long and with bristles up to 3.5 mm long.     

Astragalus mario-sousae (Fabaceae: Galegeae), a new species from northeastern Mexico

Astragalus mario-sousae is described from the central part of state of Nuevo León, Mexico. It differs fromAstragalus esperanzae by its habit, peduncles, pedicels, and fruits.

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Resumen   Astragalus mario-sousae (Fabaceae: Galegeae), a new species from northeastern Mexico. Brittonia 57: 314–319. 2005.—Astragalus mario-sousae es propuesta como especie nueva. Se conoce solo de la porción central del estado mexicano de Nuevo León. Se presentan una descripción e ilustración. Difiere deAstragalus esperanzae por su hábito erecto, pedúnculos, pedicelos y frutos más cortos.

     

A new species of Sicyos L. (Cucurbitaceae) from Oaxaca, Mexico

Sicyos mcvaughii, a new species from Oaxaca, is described and illustrated. It is similar to Sicyos sertuliferus Cogn., and grows in secondary tropical deciduous forest, between 20 and 630 meters.     

A new species of Malaxis (Orchidaceae) from Morelos, Mexico

A new species from the Mexican state of Morelos, Malaxis lyonnetii, is described and illustrated. It is similar to M. lepanthiflora but is distinguished by its much smaller flowers, distally uncinate basal lip lobes, and entire, rounded apical lip lobe.

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Resumen  Se describe e ilustra a Malaxis lyonnetii, una nueva especie del estado mexicano de Morelos. Esta especie es similar a M. lepanthiflora, de la que se distingue por las flores mucho menores, los lóbulos basales del labelo distalmente uncinados y el lóbulo apical del labelo entero y redondeado.

     

A new species of Castilleja (Orobanchaceae) from the central Sierra Madre Occidental, Mexico, and an annotated key to the Castilleja species of that region

Castilleja holmgrenii is described from several collections made in the Sierra Madre Occidental in southeast Sinaloa and adjacent southwest Durango, Mexico. The new species is a member of subgenus and sectionCastilleja. This apparently rare species is presently known from two small, geographically restricted populations. Also provided are a list of theCastilleja species of this region with notes on their status and distribution, a key for their identification, and nomenclatural and taxonomic notes concerning some of the species.     

A new species of Tzeltalia (Solanaceae) from Mexico

A new species of Tzeltalia (Solanaceae) from Chiapas, Mexico is described and illustrated: Tzeltalia esenbeckii. A key and a table, distinguishing the members of the genus, are included.     

Ten new species of Tibouchina (Melastomataceae) from Mexico

Ten new species of Tibouchina (T. almedae, T. congestiflora, T. connata, T. hintonii, T. macvaughii, T. nanifolia, T. patens, T. roseotincta, T. sinaloensis, andT. thulia) are described from western Mexico. Distinguishing characteristics, phenology, distribution, and phylogenetic relationships are discussed. Illustrations of all these new species are provided.     

Three new species of Spigelia (Strychnaceae) from Mexico

During a revisionary study ofSpigelia, three new species from Mexico were discovered. Two of these new species appear to be narrow endemics, one in the state of Chiapas and one in the state of Guerrero, and the third is more widespread in Mexico and Guatemala. These new species are described, illustrated, and distinguished from other North AmericanSpigelias.