Vidat

Vidat
Ahvenvita (Potamogeton perfoliatus)
Ahvenvita (Potamogeton perfoliatus)
Tieteellinen luokittelu
Domeeni: Aitotumaiset Eucarya
Kunta: Kasvit Plantae
Alakunta: Putkilokasvit Tracheobionta
Kaari: Siemenkasvit Spermatophyta
Alakaari: Koppisiemeniset Magnoliophytina
Luokka: Yksisirkkaiset Liliopsida
Lahko: Alismatales
Heimo: Vitakasvit Potamogetonaceae
Suku: Vidat Potamogeton
L.
Katso myös

  Vidat Wikispeciesissä
  Vidat Commonsissa

Vidat eli lapavidat (Potamogeton) on vitakasveihin kuuluva kasvisuku. Siihen kuuluu 90 lajia ja lisäksi monia kymmeniä risteymälajeja.[1] Suomessa tavataan 14 eri vitalajia sekä useita lajienvälisiä risteymiä ja risteymälajeja.

Vitoja esiintyy maailmanlaajuisesti.[1]

Vidat ovat monivuotisia ja juurakollisia vesikasveja[2]. Niiden varsi kasvaa pohjasta ja on useilla lajeilla noin metrin pituinen[2]. Kaikilla vitalajeilla on ohuita vedenalaisia uposlehtiä ja joillakin lajeilla on uposlehtien lisäksi myös paksumpia kelluslehtiä[3]. Uposlehdet ovat joko nauhamaisia tai soikeita, kun taas kelluslehdet ovat enemmän tai vähemmän soikeita[2]. Vitojen kukintona on pitkähkön varren päässä oleva tähkä[2]. Kukat ovat nelilukuisia, ja hedelmä on kuiva luumarja[2].

Nykyisin vitojen suku on usein jaettu kahdeksi erilliseksi suvuksi: lapavidat (Potamogeton) ja kaitavidat (Stuckenia).

Eräitä vitalajeja pidetään haitallisina tulokaslajeina.[4]

Lajeja ja risteymiä

  • ahvenvita (Potamogeton perfoliatus)
  • hapsivita (Potamogeton pectinatus, syn. Stuckenia pectinata)
  • heinävita (Potamogeton gramineus)
  • hentovita (Potamogeton pusillus)
  • huiskavita (Potamogeton × fennicus, syn. Stuckenia × fennica), merividan ja tuppividan risteymä
  • jokivita (Potamogeton × exilis), purovidan ja uistinvidan risteymä
  • jouhivita (Potamogeton rutilus)
  • kiiluvita (Potamogeton × nitens), heinävidan ja ahvenvidan risteymä
  • kyhmyvita (Potamogeton trichoides)
  • lankavita (Potamogeton × suecicus, syn. Stuckenia × suecica), merividan ja hapsividan risteymä
  • litteävita (Potamogeton compressus)
  • lähdevita (Potamogeton coloratus)
  • merivita (Potamogeton filiformis, syn. Stuckenia filiformis)
  • nauhavita (Potamogeton × sparganiifolius), heinävidan ja uistinvidan risteymä
  • otavita eli otalehtivita (Potamogeton friesii)
  • pikkuvita (Potamogeton berchtoldii)
  • pitkälehtivita (Potamogeton praelongus)
  • pohjanlahdenvita (Potamogeton × bottnicus, syn. Stuckenia × bottnica), hapsividan ja tuppividan risteymä
  • poimuvita (Potamogeton crispus)
  • purovita (Potamogeton alpinus)
  • soikkovita (Potamogeton nodosus)
  • suippuvita (Potamogeton acutifolius)
  • tatarvita (Potamogeton polygonifolius)
  • tuppivita (Potamogeton vaginatus, syn. Stuckenia vaginata)
  • tylppövita eli tylppälehtivita (Potamogeton obtusifolius)
  • uistinvita (Potamogeton natans)
  • vaskivita (Potamogeton × angustifolius, syn. Potamogeton × zizii), heinävidan ja välkevidan risteymä
  • välkevita (Potamogeton lucens)

Lähteet

  1. a b Govaerts, R. et al.: Potamogeton L. Plants of the World Online. Royal Botanic Gardens, Kew. Viitattu 6.1.2024. (englanniksi)
  2. a b c d e Arne A. Anderberg: Den virtuella floran: Natar (Potamogeton) Den virtuella floran. 1996. Naturhistoriska riksmuseet. Viitattu 5.10.2018. (ruotsiksi)
  3. Genus: Potamogeton Go Botany. Arkistoitu 5.3.2016. Viitattu 29.2.2016. (englanniksi)
  4. curly-leaved pondweed Potamogeton crispus L. Invasive.org. Viitattu 29.2.2016.

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