Bupleurum tenuissimum L.
slender hare's-ear
Erect annual herb. Stems solid, slightly grooved, striate, up to 50 cm high. Basal lvs linear to linear-lanceolate or spathulate, entire, acuminate, cuneate; stem lvs much reduced toward apex, linear; veins 3, ± parallel. Umbels 2-5 mm diam.; rays 1-3, unequal; bracts usually 4, lanceolate; bracteoles c. 5, lanceolate, not overlapping, 3-veined. Fls 1-5, c. 1 mm diam.; petals yellow, tinged red. Fr. subglobose, brown, conspicuously papillose, 1-2 mm long; ribs slender.
S.: confined to the Port Hills, Christchurch, and low-lying coastal areas about Banks Peninsula.
Europe, Mediterranean 1940
Waste places, salt marshes.
FL Mar.
B. tenuissimum is locally well established; its grass-like appearance makes it difficult to identify without fls or frs.
