The immovable are cailed Udbhijas. They have five species (Jati). These are-tree, shrub, creeper, plants (valli) and tvaksara (bamboo etc.). These all species are in the category (class) of straws.
उद्भिज्जाः स्थावराः प्रोक्तास्तेषां पञ्चैव जातयः। वृक्षगुल्मलतावल्लयस्त्वक्सारास्तृणाजातयः॥