Triantha is a small genus of flowering plants in the family Tofieldiaceae, first described as a genus in 1879.[1][3] False asphodel is a common name for plants in this genus.[4]
Triantha has four known species. One of these is endemic to Japan. The other three are native to North America.[2][5][6]
A comparison of DNA sequences has indicated that Triantha glutinosa might be two species.[7]
Before the family Tofieldiaceae was established in 1995, Triantha and related genera were usually placed in Nartheciaceae, Liliaceae, or Melanthiaceae, but molecular phylogenetic studies of monocots and Alismatales have shown that inclusion of Triantha etc. in these families makes them polyphyletic.
Some authors have included Triantha within the genus Tofieldia.[8] Triantha is distinguished from Tofieldia by its glandular-pubescent stems and by the presence of seed appendages. In 2011, a study of two nuclear genes and ten chloroplast genes showed that Triantha and Tofieldia are monophyletic and closely related sister clades. The species of Triantha are so closely related that the authors could not resolve any relationships among them.[7]
It was reported in August 2021 that the species Triantha occidentalis is carnivorous, catching insects with sticky hairs and enzymatic secretions on its stem.[9]
Triantha is a small genus of flowering plants in the family Tofieldiaceae, first described as a genus in 1879. False asphodel is a common name for plants in this genus.
Triantha has four known species. One of these is endemic to Japan. The other three are native to North America.
A comparison of DNA sequences has indicated that Triantha glutinosa might be two species.
Before the family Tofieldiaceae was established in 1995, Triantha and related genera were usually placed in Nartheciaceae, Liliaceae, or Melanthiaceae, but molecular phylogenetic studies of monocots and Alismatales have shown that inclusion of Triantha etc. in these families makes them polyphyletic.
Some authors have included Triantha within the genus Tofieldia. Triantha is distinguished from Tofieldia by its glandular-pubescent stems and by the presence of seed appendages. In 2011, a study of two nuclear genes and ten chloroplast genes showed that Triantha and Tofieldia are monophyletic and closely related sister clades. The species of Triantha are so closely related that the authors could not resolve any relationships among them.
It was reported in August 2021 that the species Triantha occidentalis is carnivorous, catching insects with sticky hairs and enzymatic secretions on its stem.
Species Triantha glutinosa (Michx.) Baker - sticky asphodel - Canada, Alaska, Great Lakes region, Maine, scattered other spots in USA Triantha japonica (Miq.) Baker - Honshu Triantha occidentalis (S.Wats.) R.R.Gates-western false asphodel - Western Canada (Alb, BC), western United States (AK WA OR CA ID MT WY) Triantha racemosa (Walter) Small-coastal false asphodel - Coastal Plain of United States from TX to NJTriantha, biljni rod u porodici tofildijevki. od četiri priznate vrste[1], tri rastu po Sjevernoj Americi, a jedna, Triantha japonica, japanski je endem
Triantha, biljni rod u porodici tofildijevki. od četiri priznate vrste, tri rastu po Sjevernoj Americi, a jedna, Triantha japonica, japanski je endem
Triantha (Nutt.) Baker – rodzaj wieloletnich hemikryptofitów lub geofitów ryzomowych z rodziny kosatkowatych, obejmujący 4 gatunki występujące w Japonii oraz subarktycznej Ameryce Północnej do północnych Stanów Zjednoczonych[3].
Rośliny tworzą podziemne kłącze. Pędy naziemne gruczołowate lub gruczołowato-omszone. Liście odziomkowe, równowąskie, oraz do 3 liści właściwych okalających pęd kwiatostanowy. Kwiatostan groniasty, 2-7-kwiatowy, niekiedy zwarty i przypominający kłos. Podkwiatki zrośnięte w kieliszek. Okwiat pojedynczy, 6-listkowy. Pręcików 6, o silnie spłaszczonych nitkach, rozszerzonych u nasady. Główki pręcików osadzone u nasady. Zalążnia górna, naga. Słupkowie u nasady apokarpiczne. Słupki 3. Owocami są torebki, jajowate do szeroko elipsoidalnych lub cylindrycznych, nagie. Liczba chromosomów 2n wynosi 30[4].
Przynależność tego rodzaju do rodziny kosatkowatych nie jest jednoznaczna. Angiosperm Phylogeny Website nie wymienia go na liście rodzajów w tej rodzinie, niemniej wskazuje go w charakterystyce tej rodziny[1]. Do tej rodziny klasyfikują rodzaj The Plant List (2016)[5], podobnie The Checklist of Selected Plant Families Kew Gardens[3].
USDA GRIN klasyfikuje ten rodzaj do rodziny kosatkowatych, podając jednak informację, że w innych ujęciach bywa on klasyfikowany do innych rodzin: liliowatych, melantkowatych i łomkowatych[6].
Global Biodiversity Information Facility i The International Plant Names Index zaliczają rodzaj do rodziny liliowatych[7].
Triantha (Nutt.) Baker – rodzaj wieloletnich hemikryptofitów lub geofitów ryzomowych z rodziny kosatkowatych, obejmujący 4 gatunki występujące w Japonii oraz subarktycznej Ameryce Północnej do północnych Stanów Zjednoczonych.
Triantha là một chi thực vật có hoa trong họ Tofieldiaceae.[1]
Triantha là một chi thực vật có hoa trong họ Tofieldiaceae.
