Rock Garden Plants
Phacelia  lyallii (A.Gray) Rydb.   
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FamilyBORAGINACEAE
Genus species var.Phacelia  lyallii (A.Gray) Rydb. 
SynonymsPhacelia sericea var. lyallii A.Gray (basionym)
 Phacelia sericea ssp. lyallii (A.Gray) Brand
Territory Western CanadaNorthwestern U.S.A.AlbertaBritish ColumbiaIdahoMontana
rocks and scree
Altitudesubalpine-alpine
Description stems sparsely hirsute, leaves in outline oblanceolate, 5-10cm, green, sparsely strigose, segments broadly oblong, inflorescence short and dense, calyx lobes linear, hirsute
Size20-25cm
Colordark blue
Bloomsummer
Ca
Typesubshrub
Cultivationrock crevices with favourable water regime, eastern slopes
alpine house, poor, drained soil, shading in summer
Propagationseed in spring, barely covered, germ. 1-3 months, 10-16°C
cuttings in late summer
BibliographyHitchcock, C.L.: Vascular Plants of the Pacific Northwest
USDA Plants Database plants.usda.gov
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(c) 1990-2016 RNDr. Pavel Slabý