毛唇岩桐属

Seemannia sylvatica, yellow-flowered form

Seemannia is a New World genus in the flowering plant family Gesneriaceae. There are four species in the genus, primarily found in the Andean regions of South America. The name honors the German botanist Berthold Carl Seemann.

Taxonomic history

Seemannia was created in 1855 by Regel for the species Seemannia ternifolia (now considered a synonym of S. sylvatica). In 1976 Seemannia was synonymized under the genus Gloxinia by gesneriad specialist Hans Wiehler but has more recently been revived following phylogenetic and morphological research on relationships of Gloxinia and related genera, which suggested that Wiehler's generic concept of Gloxinia was overly broad and polyphyletic. Although now recognized as a separate genus, Seemannia is closely related to Gloxinia and hybrids between the two genera are fertile although the two genera are very distinct morphologically.

Although all of the species occur in the Andes, Seemannia purpurascens is unusual in having a disjunct distribution, with populations in northern South America (Guyana, French Guiana, and northern Brazil) widely separated from Andean populations in southern Peru and Bolivia.

Species

• Seemannia gymnostoma (southern Peru, Bolivia, northern Argentina)
• Seemannia nematanthodes (Bolivia, northern Argentina)
• Seemannia purpurascens (southern Peru, Bolivia, Guyana, French Guiana, northern Brazil)
• Seemannia sylvatica (Peru, Bolivia, northern Argentina, Paraguay, southern Brazil)

References

Wikimedia Commons has media related to Seemannia.

• Roalson, E.H., J.K. Boggan, L.E., Skog, & E.A. Zimmer. 2005. Untangling the Gloxinieae (Gesneriaceae). I. Phylogenetic patterns and generic boundaries inferred from nuclear, chloroplast, and morphological cladistic data sets. Taxon 54 (2): 389-410.
• Roalson, E.H., J.K. Boggan & L.E. Skog. 2005. Reorganization of tribal and generic boundaries in the Gloxinieae (Gesneriaceae: Gesnerioideae) and the description of a new tribe in the Gesnerioideae, Sphaerorrhizeae. Selbyana 25 (2): 225-238.
• Wiehler, H. 1976. A report on the classification of Achimenes, Eucodonia, Gloxinia, and Anetanthus (Gesneriaceae). Selbyana 1 (4): 374-404.

Seemannia es un género con 14 especies de plantas herbáceas perteneciente a la familia Gesneriaceae.^[2]​ Es originario de América.

Descripción

Son plantas herbáceas perennifolias con rizomas escamosos, a menudo producidos en las puntas de largos rizomas fibrosos. Tallo erecto o decumbente . Las hojas son opuestas , ternadas o verticiladas, pecioladas, la lámina con 3-9 pares de venas. Flores axilares , generalmente solitarias (excepto S. sylvatica) llamativas. Sépalos libres. Corola tubular o inflada , a menudo constreñidas en la boca , de color rojo, naranja , púrpura , raramente amarillo, con tricomas multicelulares en forma de barril en la entrada del tubo. El fruto es una cápsula rostrada seca. Tiene numerosas semillas , elipsoidales diminutas . El número de cromosomas : 2n = 26.^[1]​

Distribución y hábitat

Se distribuyen principalmente en los Andes de América del Sur : en Bolivia, el norte de Argentina y sur de Perú. La especie S. sylvatica se extiende hasta el sur de Ecuador. Crecen en la tierra, los bancos de arena o las rocas en el bosque; se encuentra latente en temporadas.

Etimología

El género fue nombrado en honor de Berthold Carl Seemann (1825-1871) , botánico de origen alemán, colector de plantas medicinales y explorador.

Especies

• Seemannia albescens (Rusby) Fritsch
• Seemannia benaryi Regel
• Seemannia dioica Rusby
• Seemannia gymnostoma (Griseb.) Toursark.
• Seemannia latifolia Fritsch
• Seemannia longiflora Fritsch

• Seemannia major Baill.
• Seemannia nematanthodes (Kuntze) K.Schum.
• Seemannia purpurascens Rusby
• Seemannia regnelliana Fritsch
• Seemannia sylvatica (Kunth) Hanst.
• Seemannia ternifolia Regel
• Seemannia uniflora Baill.

Referencias