Pollen tube
= Pollen tube
{wiki}
A growing extension from a <pollen> grain. In a compatible <flower>, the <pollen tube> provides a route for <sperm> to the <angiosperm female gametophyte>.<Biology 2e by Mary Ann Clark and others/32.2 Pollination and Fertilization>[Biology 2e, §32.2 Double Fertilization, Figure 32.18]{ref}