Rock Garden Plants
Viola howellii A.Gray  
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FamilyVIOLACEAE
Genus speciesViola howellii A.Gray 
BibliographyProc. Amer. Acad. Arts 22: 308 (1887)
Native Rangesw. Canada to n. California
Primary BiomeTemperate
Habitatgrassland and thickets
Altitude50-1500m
Descriptionleaves orbiculate-cordate or reniform, 2-4cm wide, thin, petiolate, subglabrous, stipules ciliate, flowers above leaves, 12-15mm
Size5-40cm
Colorblue, white
Bloomspring
Ca
Typeperennial
Cultivationmesic, slightly humous, semi-shady site
alpine house, moist, rich, drained soil, semi-shade
Propagationseed in winter, barely covered, germ. 1-3 months, 13-16°C
division after flowering and in fall
SynonymsViola subcordata Greene
Territory7 Northern America
     71 Western Canada (BRC British Columbia)
     73 Northwestern U.S.A. (ORE Oregon)
     76 Southwestern U.S.A. (CAL California)
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Version 10.0
(c) 1990-2025 RNDr. Pavel Slabý