rough Indian paintbrush

A semi-parasitic herbaceous perennial up to 15cm high covered in rough, stiff hairs, and has green or purple stems, grey-green, narrow leaves, 5-8cm long, and small yellow-green tubular flowers with bright red bracts from spring to summer; the usual host plants include Penstemons, and although Castilleja are partly parasitic on the roots of other plants they seem to cause little damage to their hosts