The Glowcap family is a family of plants found in Pikmin, Pikmin 2 and Pikmin 3. Both variants shed light and are found only underground. In Pikmin and Pikmin 2, they are only cosmetic, like most plants. However, in Pikmin 3, the Common Glowcap can be used as shelter from the Vehemoth Phosbat and can be used for light.
Rather than actual plants, Glowstems are LEDs with either a green or orange light. If touched, the light will flicker for a moment, and then return to normal. They are found in caves with metallic scenery.