.   ca er ule a ▁was ▁officially ▁described ▁to ▁science ▁in ▁ 1 9 7 9 , ▁although ▁it ▁was ▁known ▁to ▁be ▁a ▁distinct ▁species ▁for ▁about ▁two ▁centuries ▁before ▁that . ▁The ▁tax on ▁St roph aria ▁cy ane a , ▁as ▁defined ▁by ▁R isto ▁Tu om ik os ki ▁in ▁ 1 9 5 3 , ▁and ▁used ▁by ▁several ▁later ▁authors , ▁is ▁a ▁syn onym ▁of ▁S .   ca er ule a . ▁ ▁The ▁fruit ▁bodies ▁( m ush rooms ) ▁of ▁St roph aria ▁ca er ule a ▁feature ▁a ▁green ish - blue ▁cap ▁sp ars ely ▁covered ▁in ▁white ▁fle cks ▁of ▁ve il ▁at ▁the ▁margin , ▁and ▁a ▁stick y , ▁gl ut in ous ▁surface ▁texture . ▁G ills ▁on ▁the ▁cap ▁unders ide ▁have ▁an ▁ad n ate ▁or ▁sin uate ▁attachment ▁to ▁the ▁st ipe . ▁They ▁are ▁initially ▁pale ▁pur pl ish - b rown , ▁becoming ▁dark er ▁brown ▁in ▁age ▁as ▁the ▁sp ores ▁m ature . ▁The ▁green ish ▁st ipe ▁is ▁covered ▁in ▁white ▁scales ▁up ▁to ▁a ▁thin , ▁trans ient ▁ring . ▁It ▁is ▁similar ▁in ▁appearance ▁to ▁its ▁less ▁common ▁relative ▁St roph aria ▁aer ugin osa , ▁but ▁that ▁species ▁has ▁a ▁more ▁robust ▁ring ▁on ▁its ▁st ipe , ▁more ▁scales ▁on ▁the ▁cap , ▁and ▁dark er ▁g ills ▁with ▁white ▁edges . ▁ ▁Tax onomy ▁In ▁ 1 9 5 3 , ▁the ▁Finn