A dwarf perennial with erect, branched stems and spiny, highly divided dark green leaves. Flowering in summer, it has abundant small thimble shaped flower-heads with spiky blue bracts which can also ...
A large evergreen bamboo forming broad, dense clumps of solid, olive-green stems, 2.5-3.5m high or more, well-furnished with short spreading sprays of narrowly lance-shaped, mid-green leaves up to 6cm ...