Amphistemon is a genus of 2 species of flowering plants in the familyRubiaceae. It is described by Inge Groeninckx in 2010 based on a molecular analysis of the Hedyotis-Oldenlandia group.[1] The genus name is based on the Greek 'amphi-' (=double or of two kinds) and 'stemon' (=stamen) referring to the dimorphic stamen position characteristic for this genus.
Amphistemon are erect perennial herbs or subshrubs with the unique feature in the Hedyotis-Oldenlandia group of having stamens inserted at two distinct levels in the corolla tube, the lower stamens with filaments and anthers shorter than those of the upper stamens.[1]
Distribution and habitatedit
It is endemic to southwestern and western Madagascar and is found in dry spiny forest-thicket and coastal bushland.[1]
Taxonomyedit
According to molecular analysis of the genus, it is found to be closely related to Astiella of the species-group Hedyotis-Oldenlandia.[1]
Speciesedit
Amphistemon humbertii Groeninckx
Amphistemon rakotonasolianus Groeninckx
Referencesedit
^ abcdGroeninckx I, De Block P, Robbrecht E, Smets E, Dessein S. 2010. "Amphistemon and Thamnoldenlandia, two new genera of Rubiaceae (Spermacoceae) endemic to Madagascar." Botanical Journal of the Linnean Society 163: 447-472.
External linksedit
Amphistemon in the World Checklist of Rubiaceae
This Rubioideae-related article is a stub. You can help Wikipedia by expanding it.
amphistemon, genus, species, flowering, plants, family, rubiaceae, described, inge, groeninckx, 2010, based, molecular, analysis, hedyotis, oldenlandia, group, genus, name, based, greek, amphi, double, kinds, stemon, stamen, referring, dimorphic, stamen, posit. Amphistemon is a genus of 2 species of flowering plants in the family Rubiaceae It is described by Inge Groeninckx in 2010 based on a molecular analysis of the Hedyotis Oldenlandia group 1 The genus name is based on the Greek amphi double or of two kinds and stemon stamen referring to the dimorphic stamen position characteristic for this genus Amphistemon Scientific classification Kingdom Plantae Clade Tracheophytes Clade Angiosperms Clade Eudicots Clade Asterids Order Gentianales Family Rubiaceae Subfamily Rubioideae Tribe Spermacoceae Genus AmphistemonGroeninckx Type species Amphistemon humbertiiGroeninckx Contents 1 Description 2 Distribution and habitat 3 Taxonomy 4 Species 5 References 6 External linksDescription editAmphistemon are erect perennial herbs or subshrubs with the unique feature in the Hedyotis Oldenlandia group of having stamens inserted at two distinct levels in the corolla tube the lower stamens with filaments and anthers shorter than those of the upper stamens 1 Distribution and habitat editIt is endemic to southwestern and western Madagascar and is found in dry spiny forest thicket and coastal bushland 1 Taxonomy editAccording to molecular analysis of the genus it is found to be closely related to Astiella of the species group Hedyotis Oldenlandia 1 Species editAmphistemon humbertii Groeninckx Amphistemon rakotonasolianus GroeninckxReferences edit a b c d Groeninckx I De Block P Robbrecht E Smets E Dessein S 2010 Amphistemon and Thamnoldenlandia two new genera of Rubiaceae Spermacoceae endemic to Madagascar Botanical Journal of the Linnean Society 163 447 472 External links editAmphistemon in the World Checklist of Rubiaceae nbsp This Rubioideae related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Amphistemon amp oldid 1109279781, wikipedia, wiki, book, books, library,
