The glands that secrete hormones comprise the endocrine signaling system. The term hormone is sometimes extended to include chemicals produced by cells that affect the same cell (autocrine or intracrine signalling) or nearby cells (paracrine signalling).
A fen is one of the main types of wetland, the others being grassy marshes, forested swamps, and peaty bogs. Along with bogs, fens are a kind of mire. Fens are usually fed by mineral-rich surface water or groundwater.
Reminiscent of anise and licorice, fennel is one of those versatile herbs unfamiliar to many Americans, but found to be delightful upon experimentation. One reason for its versatility is that every part can be used: the bulb root, the tender, wispy leaves, and the seeds.