It is hairy , branched , hollow ( except on the nodes ) and sparsely grooved . It is hairy , branched , hollow ( except at the nodes ) , and sparsely grooved .
Ia berbulu, bercabang, berongga (kecuali pada nod) dan jarang digroov. Ia berbulu, bercabang, berongga (kecuali pada nod), dan jarang digroov.