Thesium spinosum L.F.

A much-branched woody shrub with very spiny leaves and bracts; branches flexuous, often glaucous-grey, glabrous; leaves spreading at right angles, pungent, triangular-subulate, very acute, 2 1/2-4 lin. long, with the margins closely adpressed together, subdecurrent on the stem, glabrous; bracts like the leaves but a little shorter; flowers solitary in the axil of the bract, pedicellate; bracteoles 2, very small, subulate; pedicel short, rather stout, glabrous; perianth 3/4 lin. long, with distinct external glands; segments triangular, slightly hooded, about 1/2 lin. long, with a slight trace of flaps on the margin; anthers exserted, 1/8 lin. long; disc conspicuous; style 1/4 lin. long; fruits oblong-ellipsoid, 1 1/3 lin. long, rather faintly 10-ribbed, reticulate between the ribs.