Rock Garden Plants
Ivesia  tweedyi Rydb.   
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FamilyROSACEAE
Genus species var.Ivesia  tweedyi Rydb. 
SynonymsHorkelia tweedyi (Rydb.) A.Nelson & J.F.Macbr.
 Potentilla tweedyi (Rydb.) J.T.Howell
Territory Northwestern U.S.A.IdahoMontanaWashington
dry, rocky slopes
Altitude1600-2300m
Description taproot, basal leaves numerous, 3-8cm long, leaflets 19-35, to 1cm, pinnatipartite, segments filiform to linear, flowers in compact cyme, petals 3-4mm long
Size5-20cm
Coloryellow
Bloomsummer
Ca
Typetuft
Cultivationsunny, dry, rock crevices, protection against winter wet
alpine house, poor, drained soil, sun
Propagationseed in spring, barely covered, germ. 1-3 months, 18-21°C
cuttings in late summer and fall
BibliographyFlora of North America www.eFloras.org
USDA Plants Database plants.usda.gov
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý