Sedum forsterianum Sm., 1802

Gallo, Lorenzo & Zika, Peter F., 2014, A taxonomic study of Sedum series Rupestria (Crassulaceae) naturalized in North America, Phytotaxa 175 (1), pp. 19-28 : 24

Sedum forsterianum Sm. (1808: 26: 1802, tab. 1802)

Type: Mr. E. Forster’s garden, Walthamstow. July 1807. Root brought from below the Devil’s bridge, Cardiganshire [(Lectotype, designated here: LINN-HS 833.3 !].

Homotypic synonyms: Petrosedum forsterianum (Sm.) Grulich (1984: 40) , Sedum pruinatum Link subsp. forsterianum (Sm.) Nyman (1879: 261) , S. rupestre L. subsp. forsterianum (Sm.) R.L. Evans (1983: 290) , S. rupestre L. var. forsterianum (Sm.) Fiori (1924: 720) .

Note: The type was collected by E. Forster in the 1806 “on a rock at the fall of the Rhydoll, near the Devil’sbridge, Cardiganshire [now Ceredigion county, Wales, Great Britain]” (see Smith, 1808: 1802) and grown in his garden; the population at the type locality is apparently disappeared (cfr. Newton, 1999).

Perennial plant with sterile shoots creeping, procumbent and rooting with green or glaucous linear and flattened leaves clustered in bundles at the apex. Flowering stems erect of 10–40 cm, reflexed before the anthesis, inflorescence without bracts, globose in bud; flowers (5) 6–7 (9) merous, obdiplostemonous, with pedicel of 1–3 mm, sepals lanceolated and petals spreading, yellow lemon often with a green strip in the middle; filaments yellow and glabrous, styles erect at the anthesis.