excurrent

adj

1. (not-comparable)Of a vein or costa, extending beyond the tip or the margin of a leaf.

   “This species of tree is recognized by the excurrent veins in its leaves.”

2. (not-comparable)Carrying outward; permitting outward flow.

   “The excurrent apertures (called oscula because they look like little mouths) project their thin cone-shaped lips into the water stream passing over a sponge.”