"X"

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

(note:  herbs/plants ref. w/"The English Physitian", Culpeper, Nicholas, 1616-1654. -- where possible.)

or   (Botanical.com, A Modern Herbal, Mrs. M. Grieve)

Xenocrates   

"...And Xenocrates cured mad men with musical tunes, which instruments might be easily made of Horses shank-bones, or the hollow stalks of Hellebore.  Thales Milerius used a Harp against the Plague..."

Xenophon   

The Athenian Xenophon, c.430-c.354 BC, was both a soldier and one of the most celebrated of the ancient Greek historians. Like Plato, he was a follower of Socrates in his youth, and he later wrote about Socrates in his Memorabilia and other essays. In 401, Xenophon left Athens to join a mercenary army led by Cyrus the Younger against his brother King Artaxerxes II of Persia. The Anabasis, his lively account of that campaign, describes the desperate efforts of the Greek army to make its way from Babylon to the Black Sea through the heart of hostile territory. Banished from Athens because of his pro-Spartan sympathies, Xenophon served in the Spartan army. The Spartans eventually gave him a property near Olympia, where he devoted himself to hunting and literature. He wrote the Hellenica, a history of Greece from 411 to 362, in continuation of Thucydides' great work; a romantic biography of Cyrus the Great, Cyropaedia; and numerous lesser essays.

"...Pollux says, these are called Alopecidae, fox-dogs, as Xenophon also writes of them, and makes them to be hunting dogs..."