Actually, tap-rooted perennial herbaceous plant.

No, no, I put together a very, very herbaceous mix.

The study included the assessment of about 60 publications and focussed on details of facilities (technology, manual vs. automatic feeding; size of plants, presence or absence of air pollution controls, etc.), fuel types (fossil, herbaceous vs. woody biomass; clean vs. contaminated), and residues (soot, mixed ashes, etc.).