1. Leafy wildflower with lavender-pink flowers that open in the evening and remain through cool part of the next day; found in open woods or brush in mountains of southern Colorado to Arizona and into Mexico
   - mountain four o'clock

Type of: four o'clock

• internal iliac vein
• internal jugular vein
• internal maxillary artery
• internal medicine
• internal organ
• internal representation
• internal respiration
• internal revenue
• internal revenue agent
• Internal Revenue Service
• internal rhyme
• internal secretion
• internal spermatic artery
• internal-combustion engine
• internalisation
• internalise
• internality
• internalization
• internalize
• internally
• internasal suture
• international
• international affairs
• international ampere
• International Association of Lions clubs