ACRE L., 1753
Synonyms :
Sedum sexangulare var. acre (L.) F. & P. (1898)
Sedum acre var. sopianae (Priszter) Soó (s.a.)
Sedum procumbens Schrank (1789)
Sedum glaciale Clarion (1805) / Sedum acre ssp. glaciale (Clarion) Duby (s.a.)
Sedum neglectum Tenore (1831) / Sedum acre ssp. neglectum (Tenore) Arcangeli (1882) / Sedum acre var. neglectum (Tenore) Sampaio (1947)
Sedum acre var. genuinum Godron (1848)
Sedum acre var. aureum Masters (1878)
Sedum acre var. majus Masters (1878)
Sedum acre ssp. majus (Masters) R.T.Clausen (1975)
Sedum acre fa pentagonum Pacher (1887)
Sedum acre var. morbifugum Chabert (1889)
Sedum acre fa typicum Beck (1892)
Sedum erectum Freyn (1895)
Sedum wettsteinii Freyn (1900) / Sedum acre ssp. wettsteinii (Freyn) O.Schwarz (s.a.) / Sedum acre var. wettsteinii (Freyn) Hegi & Em.Schmidt (1922)
Sedum acre var. robustum Velenovsky (1902) / Sedum robustum (Velenovsky) Domin (1930) / Sedum acre ssp. robustum (Velenovsky) J.A.Huber (1936)
Sedum acre fa umbrosum Schubert (1904)
Sedum acre var. atlanticum Battandier (1905)
Sedum drucei Graebner (1913) / Sedum acre ssp. drucei (Graebner) J.A.Huber (1936)
Sedum minimum Nieuwland (1915)
Sedum maweanum hort. ex Praeger (1921)
Sedum acre fa fastigiatum Beck (1922)
Sedum acre fa grandiflorum Beck (1922)
Sedum acre fa imbricatum Beck (1922)
Sedum krajinae Domin (1929) / Sedum acre var. krajinae (Domin) Jávorka (1924) /Sedum acre ssp. krajinae (Domin) J.A.Huber (1936)
Sedum rohlenae Domin (1929) / Sedum acre var. rohlenae (Domin) Domin (s.a.) / Sedum acre ssp. rohlenae (Domin) J.A.Huber (1936)
Sedum zlatiborense Domin (1929) / Sedum acre var. zlatiborense (Domin) Domin (s.a.) / Sedum robustum var. zlatiborense (Domin) Domin (s.a.)
Sedum acre fa confertum Domin (1930)
Sedum acre var. normanii Fröderström (1932)
Sedum acre ssp. euacre Dostal (1948)
Sedum acre fa acutifolium Stefanoff (1950)
Sedum acre fa microphyllum Stefanoff (1950) / Sedum acre ssp. microphyllum (Stefanoff) Bertová (1982)
Sedum sexangulare fa elatum Priszter (1960)
Sedum neglectum ssp. sopianae Priszter (1963)
Sedum acre fa ramosum Priszter (1963)
Sedum acre var. almadii Priszter (1966)
Distribution : Almost throughout the whole of Europe as well as in North Africa and Turkey (North Anatolia); from sea-level to ± 2500m.
Description (by 't Hart & Bleij in IHSP, 2003) :
Perennial herbs, tufted or forming mats of intertwined laxly branched trailing and rooting non-flowering shoots ascending at the tips.
Leaves alternate, densely imbricate, sessile with a short obtuse spur, usually triangular-ovoid (rarely subconical), obtuse, terete to semiterete (elliptic in cross-section) usually deciduous (if persistent then white, soft and papery), (2-) 5 (-8) mm.
Inflorescences : Flowering branches erect, usually simple, 5 – 10 (-15) cm; inflorescences cymes with (1-) 2 (-3), rarely forked, monochasial branches, bracts 2 per flower.
Flowers 5-merous, sessile or subsessile, sepals basally free, spurred, unequal, oblong-ovoid, obtuse, to ± 3 mm, petals free, oblong-ovoid to lanceolate, acute to acuminate, bright yellow, 5 – 9 mm, anthers oblong, yellow.
Cytology : 2n = 40, 60, 80, 100, 120