Pollen tube
Flower trait
Definition: A slender tube growing from the pollen grain that carries the male gametes and delivers them to the ovary.
How it applies to plumeria: Pollen tube can describe the bloom, inflorescence, fragrance, or flower structure of a plumeria. Flower traits are some of the most useful comparison clues, especially when they are recorded with bloom age, season, sun exposure, and location.
What to look for: Compare mature blooms from several photos when possible. Note the center color, petal shape, petal overlap, color pattern, fragrance, bloom size, and whether the color fades, intensifies, or changes with heat and sun.
Identification note: This term is one clue. A plumeria should be compared using all available traits, photos, source history, and growing context rather than a single characteristic.