procumbent
adjective
[ prə(ʊ)ˈkʌmb(ə)nt ]
• (of a plant or stem) growing along the ground without throwing out roots.
• "some forms have long procumbent branches"
Origin:
mid 17th century: from Latin procumbent- ‘falling forwards’, from the verb procumbere, from pro- ‘forwards, down’ + a verb related to cubare ‘to lie’.