Do gymnosperms and angiosperms have tylosoids ?

Explanation

(i) There are tylosoids in gymnosperms and angiosperms . In gymnosperms , the resin ducts are blocked by tylose like ingrowths from the neighbouring resin producing parechyamatous cells. Eg : Pinus.
(ii) In angiosperms, the sieve tubes are blocked by tylose like ingrowths from the neighbouring parenchyamatous cells. Eg: Bombax. These are called tylosoids.