Rock Garden Plants
Petrophytum  hendersonii (Canby) Rydb.   
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FamilyROSACEAE
Genus species var.Petrophytum  hendersonii (Canby) Rydb. 
SynonymsEriogynia hendersonii Canby (basionym)
 Luetkea hendersonii (Canby) Greene
 Spiraea hendersonii (Canby) Piper
Territory Northwestern U.S.A.Washington
rocks
Altitude1000-2300m
Description leaves oblanceolate to spathulate-obovate, 10-25mm long, 3-veined, sericeous, raceme 2-5cm long, compact, petals oblong, anthers 35-40
Size5-10cm
Colorwhite
Bloomearly summer
Ca
Typesubshrub, carpet
Cultivationsunny, dry, rock crevices, protection against winter wet
alpine house, poor, drained soil, sun
Propagationseed in winter, germ. 1-3 months, 16-18°C
cuttings in late summer
BibliographyFlora of North America www.eFloras.org
USDA Plants Database plants.usda.gov
Version 8.0
(c) 1990-2016 RNDr. Pavel Slabý