1. Having existed for a long time
   "a longstanding friendship"; "the longstanding conflict"

See also: long

• purple clover
• purple cress
• purple emperor
• purple finch
• purple fringeless orchid
• purple fringeless orchis
• purple gallinule
• purple grackle
• purple granadillo
• purple ground cherry
• purple heart
• purple heather
• purple loco
• purple locoweed
• purple loosestrife
• purple martin
• purple milk vetch
• purple mullein
• purple nightshade
• purple onion
• purple orchis
• purple osier
• purple passage
• purple patch
• purple pea