Wikipedia: Stud poker
Stud poker is any of a number of poker variants in which each player receives a mix of face-down and face-up cards dealt in multiple betting rounds. Stud games are also typically non-positional games, meaning that the player who bets first on each round may change from round to round (it is usually the player whose face-up cards make the best hand for the game being played). The cards dealt face down to each individual player are called hole cards (which gave rise to the common English expression ace in the hole, which suggests that one has something valuable that is not apparent to others).
New York Stud - Five-card stud in which a four flush beats a pair.
by George S. Coffin
Philadelphia: David McKay Company
Another mild novelty game is New York Stud in which a four-flush beats a pair but loses to two pairs. Many Big Stuf players like this game, for the three-flush threat showing tames the betting. But in limit play, there are more raises and more hopeful stayers.
Pg. 182 (GLOSSARY):
New York Stud -- Five-card Stud in which a four-flush beats a pair.
The Complete Guide to Winning Poker
by Albert H. Morehead
New York: Simon and Schuster
Pg. 268 (GLOSSARY):
New York stud: stud poker in which a four-flush beats a pair.
Hoyle's Modern Encyclopedia of Card Games
by Walter B. Gibson
Garden City, NY: Doubleday & Company, Inc.
NEW YORK STUD: Five-Card Stud, page 228, with a four flush ranking higher than a pair but below two pair. See Canadian Stud, page 246, a similar game.