Spiraea douglasii var. roseata
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 3: 192. 1961.
Endemic
Basionym: Spiraea roseata Rydberg in N. L. Britton et al., N. Amer. Fl. 22: 250. 1908
Synonyms: S. idahoensis A. Nelson
Revision as of 14:25, 30 July 2020 by imported>Volume Importer
Leaf abaxial surfaces glabrous or pubescent. Inflorescence branches glabrescent or glabrous. Pedicels glabrescent or glabrous. Flowers: hypanthia and sepals glabrescent or glabrous.
Phenology: Flowering Jun–Aug; fruiting Jul–Nov.
Habitat: Stream banks, woodland margins, meadows, roadsides
Elevation: 300–2500 m
Discussion
P. A. Rydberg (1917) considered Spiraea roseata to be a hybrid of S. densiflora and S. menziesii (here S. douglasii var. menziesii), and considered S. idahoensis to be a distinct species. At this time, it is unclear whether it is indeed a hybrid or a geographic variant of S. douglasii. The occurrence of specimens in the Columbia River region suggests a hybrid origin.
Selected References
None.
Lower Taxa
None.
... more about "Spiraea douglasii var. roseata"
aggregated +
glabrous +
glabrous +
perigynous +
dehiscent +
acute;obtuse +
cuneate +
elliptic +
bicolorous +
chartaceous +
absent +
absent +
free +
simple +
alternate +
dimorphic +
aggregated +
absent +
aggregated +
glabrous +
shiny +
oblanceoloid +
5;4;5;4;5;4;5;4;5;4 +
coriaceous +
fascicles +
persistent +
hemispheric +
1 cm10 mm <br />0.01 m <br /> (?) +
(2-)3-1000+-flowered +
crassinucellate +
alternate +
deciduous +
craspedodromous +
absent +
aggregated +
clustered +
2-4 times diam branches +
conic +
absent +
perigynous +
elliptic +
ovate;obovate +
absent +
1;250 +
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. +
1961 +
prominent +
not arillate +
2;4 +
fusiform;oblong +
ovate +
1 cm10 mm <br />0.01 m <br /> (?) +
absent +
Endemic +
shorter +
2-3 times petal length +
shorter or longer +
25;35 +
nectariferous +
absent +
reduced +
branched +
young +
villous;glabrous +
palmate +
pinnate +
absent +
distinct +
terminal +
not elongate +
Spiraea douglasii var. roseata +
Spiraea douglasii +
variety +
developed +
absent +
inconspicuous +
reduced +
rhizomatous +
perennial +