Kalmar "lichen doki" tana nufin wani nau'in lichen, wanda wani nau'in halitta ne wanda ya kunshi naman gwari da abokin aikin photoynthetic, yawanci alga ko cyanobacterium. Ana yawan samun lichens akan duwatsu, bishiyoyi, da sauran wurare a wurare daban-daban, gami da dazuzzuka, sahara, da tundras. ," wanda ke da tsayin su, thallus (jiki) mai reshe mai kama da jelar doki ko kwalabe. thallus na horsetail lichens yawanci launin toka-kore ne ko launin ruwan kasa-kore a launi kuma yana iya bambanta da rubutu daga wiry zuwa bushy. Ana samun dokin doki a cikin dazuzzuka da sauran wurare masu danshi, galibi suna girma a kan bawon bishiyoyi ko kuma a kan duwatsu masu kauri. Sashin fungal na lichen yana samar da tsari da kariya, yayin da abokin hulɗar photosynthesis ke samar da abinci ta hanyar photosynthesis. Kwayoyin halittu biyu suna rayuwa ne cikin alakar juna, suna amfanar juna. Horsetail lichens wani muhimmin bangare ne na yawancin halittu masu rai, yana samar da wurin zama da abinci ga kwayoyin halitta daban-daban, kuma ana amfani da su wajen maganin gargajiya da kuma rini a wasu al'adu.