Thalictrum

Contains 4 accepted taxa overall.

Characteristics
Thalictrum L.
RANUNCULACEAE
MEADOWRUE
View USF Herbarium specimens of this family
Classification
RANUNCULALES
Thalictrum
Citation
THALICTRUM Linnaeus, Sp. Pl. 545. 1753, nom. cons.
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TYPE: Thalictrum foetidum Linnaeus, typ. cons.
Distribution Map Present

This species have been reported in the counties highlighted.

Species
Scientific Name Common Name Herbarium Specimens Status Photos
Thalictrum cooleyi COOLEY'S MEADOWRUE Native Rare-State Endangered-US FACW (NWPL) FACW (DEP)
Thalictrum macrostylum PIEDMONT MEADOWRUE Native FACW (NWPL) FACW (DEP)
Thalictrum revolutum WAXYLEAF MEADOWRUE Native FAC (NWPL) FACW (DEP)
Thalictrum thalictroides RUE ANEMONE Native Rare-State FACU (NWPL) FACW (DEP)
Identification Key
1.  Plant to 30 cm tall; flowers solitary or in umbels, bisexual
T. thalictroides
1.  Plant 40-200 cm tall; flowers in racemes or panicles, unisexual or unisexual and bisexual
2
2.  Leaflets linear to narrowly lanceolate or oblanceolate, (2.6–)4–26 times longer than wide
T. cooleyi
2.  Leaflets nearly orbiculate, ovate, lanceolate to obovate, usually less than 4 times longer than wide
2
3.  Leaflet chartaceous to subcoriaceous, margins sometimes revolute (except the lobes), the underside glabrous; achenes short stipitate to sessile, glabrous to pubescent; sepals 1-2 mm long; anthers 0.5-1.2 mm long; stigma 0.6-1.7 mm long
T. macrostylum
3.  Leaflet coriaceous with strongly revolute margins, the underside stipitate-glandular (or occasionally muricate or whitened papillose, rarely pubescent otherwise); achenes more or less sessile, often stipitate-glandular; sepals 3-4 mm long; anthers 1.5-2.8 mm long; stigma 2-3.5 mm long
T. revolutum
Genus Synonyms
Synonym Full Citation Basionym Type
Anemonella Anemonella Spach, Hist. Nat. Vég. 7: 239. 1839. TYPE: Anemonella thalictroides (Linnaeus) Spach (Anemone thalictroides Linnaeus)
Leucocoma Leucocoma (Greene) Nieuwland, Amer. Midl. Naturalist 3: 254. 1914. BASIONYM: Thalictrum Linnaeus, subg. Leucocoma Greene, Leafl. Bot. Observ. Crit. 2: 55. 1910. TYPE: Leucocoma canadensis (Miller) Nieuwland (Thalictrum canadense Miller)
Physocarpum Physocarpum (de Candolle) Berchtold & J. Presl, Prir. Rostlin 1(Ranunc.): 14. 1824. BASIONYM: Thalictrum Linnaeus, sect. Physocarpum de Candolle, Syst. Nat. 1: 169, 171. 1817. TYPE: Non designatus.
Sumnera Sumnera Nieuwland, Amer. Midl. Naturalist 3: 254. 1914. TYPE: = Physocarpum (de Candolle) Berchtold & J. Presl 1823.
Syndesmon Syndesmon (Hoffmannsegg ex Endlicher) Britton, Ann. New York Acad. Sci. 6: 237. 1891. BASIONYM: Thalictrum Linnaeus, sect. Syndesmon Hoffmannsegg ex Endlicher, Gen. Pl. 845. 1839. TYPE: = Anemonella Spach 1839.
Tripterium Tripterium (de Candolle) Berchtold & J. Presl, Prir. Rostlin 1(Ranunc.): 14. 1824. BASIONYM: Thalictrum Linnaeus, sect. Tripterium de Candolle, Syst. Nat. 1: 169. 1817. TYPE: Non designatus.