Difference between Old Maid and Madagascar Periwinkle

OLD MAID vs MADAGASCAR PERIWINKLE: NOUN

A person who is primly fastidious
An elderly unmarried woman
Any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads
Commonly cultivated Old World woody herb having large pinkish to red flowers
Used as a disparaging term for a woman who is no longer young and has not married.
A person regarded as being primly fastidious.
A card game in which the player who holds a designated card at the end is the loser.
The loser of this game.
A card game using a pack of cards from which one queen has been removed; players match cards and the player holding the unmatched queen at the end of the game is the loser (or `old maid')
A gaping clam: same as gaper, 4.
An old woman who has never married; a spinster.
A particular kind of periwinkle.
A particular kind of zinnia.
An unpopped kernel in a batch of popped popcorn kernels.
A card game in which cards must be paired and one undesirable card is designated "old maid".
An unpaired card in that game.
The loser in a game of old maid
The house-or garden-plant Vinca rosea.

Parcheesi, Mahjongg, Solitaire, Gin rummy, Red periwinkle, Catharanthus roseus, Cayenne jasmine, Old maid flower, Vinca rosea, Cape periwinkle, Rose periwinkle, Madagascar periwinkle, Periwinkle, Zinnia, Spinster

Bromelain, Curcuma, Amygdalin, Bearberry, Ricinus communis, Colchicum, Ageratum, Vinca rosea, Rose periwinkle, Red periwinkle, Cayenne jasmine, Catharanthus roseus, Cape periwinkle, Old maid, Periwinkle

Bedrich smetana, Oblomov, Aram khachaturian, Appassionata, Catch phrase, Bejewelled, Jean anouilh, Cribbage, Harpsichord, Canasta, Rummy, Mahjongg, Gin rummy, Periwinkle, Spinster

Feverfew, Rhizomatous, Vinca minor, Comfrey, Officinalis, Nigella, Pueraria, Bromelain, Curcuma, Amygdalin, Bearberry, Ricinus communis, Colchicum, Ageratum, Periwinkle

Old Maid after all the other cards have been paired off.
Old Maid, Hearts what to do next, ask your children.
Prudence is a rich, ugly, old maid courted by Incapacity.
The exact Old Maid cards I had as a kid!
This was the set of Old Maid cards I had.
As was Loo, Old Maid, Snap and Ecarte.
An old maid just beyond a marriageable age.
You aonna end up beina an old maid.
It is indeed a bad idea for the old maid to meet the new maid.
Groups will add an old maid card to the deck and then play through the deck finding pairs until the old maid is determined.