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Aëtius: see under Claudius Galen.
Alexander the Great: look under Hermes.
Alexias the root-cutter: will be spoken of under Thrasyas.
Anaxagoras, the natural philosopher: is cited by Theophrastus in History of Plants [Book 3, Chapter 2], where he treats the generation of plants.
Andreas: I advise that he be abandoned, as he wrote many things superstitiously and arrogantly; and much more so Pamphilus, who never saw, even in his dreams, those plants whose likenesses he attempts to describe. For such men—as Heraclides of Tarentum used to compare them—are very like heralds who describe the marks of some fugitive slave whom they have never even seen, based on reports they have heard; and they utter the words as if they were some incantation, not even likely to recognize the one they describe if he were standing right next to them. Thus Galen. Crateuas the root-cutter and Andreas the physician (for these seem to have treated this part of the study more diligently than the rest) left behind writings on many most useful roots and several herbs. Nevertheless, on behalf of the ancients, this must be attested: that in the few things handed down by them, what they handed down was exact. Thus Dioscorides.
Brunfels says that Andreas of Chios, a writer on herbs, is mentioned in the first book of Dioscorides; I do not recall ever reading the surname "of Chios" (to call it by its gentilic name). For Pliny also, though citing Andreas the physician very often—first in the twentieth book, then in the six immediately following—nowhere added the name of his country, so far as I know.
Athenaeus is the authority that Andreas the physician left certain writings concerning serpents and concerning things falsely believed. The Scholiast of Nicander, in the Theriaca, mentions a book by the same man entitled Naphthes.
Androcides, having observed that the nature of the cabbage is hostile to the vine, discovered from it a remedy against wine and drunkenness: Theophrastus near the end of the fourth book of the History of Plants, and Pliny (17.24) borrowed from him, though he left the Greek word raphanus; Gaza better translated it as brassica [cabbage]. This was undoubtedly the same Androcides—since the calculation of the time also agrees—who (as Pliny reports, 14.5) wrote to King Alexander: "O King, when you are about to drink wine, remember that you drink the blood of the earth," etc.
Androtion is the authority that the myrtle and the olive especially stand in need of pruning: Theophrastus, History of Plants 2.8. The same man is named by Varro and Columella among the writers on rural matters whose homeland is unknown; likewise by Pliny among the same, in books 8, 10, 14, 15, 17, and 18.
The Scholiast of Nicander, in the Theriaca, records the words of a certain Antigonus concerning laurel and the daucus [wild carrot].