 B. telmatiaea grows as an upright bush up to 2 m ( 7 ft ) high . It has hairy stems and branchlets , and straight , narrow leaves from 1 ½ to 3 cm ( ½ – 1 in ) long and about a millimetre ( 1 ⁄ 16 in ) wide . The leaves have a green upper surface and white hairy undersurface . The new growth is pale brown , later turning green . 
