Rock Garden Plants
Petrophytum  caespitosum (Nutt.) Rydb.   
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FamilyROSACEAE
Genus species var.Petrophytum  caespitosum (Nutt.) Rydb. 
SynonymsSpiraea caespitosa Nutt. (basionym)
 Eriogynia caespitosa (Nutt.) S.Watson
 Luetkea caespitosa (Nutt.) Kuntze
Territory Northwestern U.S.A.North-Central U.S.A.Southwestern U.S.A.South-Central U.S.A.
rocks
Altitude1100-3000m
Description leaves spathulate to oblanceolate, 7-14mm, uninerved, on both faces grey-green, raceme densely crowded, spicate, 2-5cm long, petals ca. 1mm long
Size5-10cm
Colorwhite
Bloomsummer
Caind
Typesubshrub, cushion
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