Spiraea douglasii var. roseata

(Rydberg) C. L. Hitchcock in C. L. Hitchcock et al.

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
Treatment appears in FNA Volume 9. Treatment on page 408. Mentioned on page 407.
Revision as of 13:25, 30 July 2020 by imported>Volume Importer
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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.
pubescent +  and glabrous +
acute;obtuse +
Richard Lis +
(Rydberg) C. L. Hitchcock in C. L. Hitchcock et al. +
reddish +  and dark-brown gray or gray-black +
not +  and exfoliating +
compound +  and simple +
opposite +  and alternate +
cuneate +
Spiraea roseata +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
elliptic +  and obovate +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
coriaceous +, chartaceous +  and membranous +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 4 cm40 mm <br />0.04 m <br /> (?) +
glabrate +  and tomentose +
Idaho +  and Wash. +
not +  and aggregated +
300–2500 m +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
unisexual +  and bisexual +
oblanceoloid +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
tomentose +  and glabrous +
5;4;5;4;5;4;5;4;5;4 +
list +  and count +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
coriaceous +
not +  and aggregated +
not +  and aggregated +
Stream banks, woodland margins, meadows, roadsides +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glabrous +  and glabrescent +
hemispheric +
1 cm10 mm <br />0.01 m <br /> (?) +
(2-)3-1000+-flowered +
glabrous +  and glabrescent +
axillary +  and terminal +
crassinucellate +
compound +  and simple +
deciduous +
craspedodromous +
pinnate +  and serrate +
toothed +, unlobed +  and lobed +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and apical +
racemiform +  and corymbiform +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2-4 times diam branches +
8cm +  and 25cm +
glabrescent +  and tomentose +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
glabrous +  and glabrescent +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 (?) +  and 4 (?) +
light +  and dark-pink +
free +  and distinct +
ovate;obovate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Jun–Aug +  and fruiting Jul–Nov. +
adnate +, free +, connate +  and distinct +
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. +
not arillate +
fusiform;oblong +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
deciduous +  and persistent +
free +  and distinct +
reflexed +, erect +, ascending +  and spreading +
glabrous +  and glabrescent +
1 cm10 mm <br />0.01 m <br /> (?) +
2 +  and 4 +
free +  and distinct +
2-3 times petal length +
shorter or longer +
nectariferous +
reddish-brown +  and brown +
decumbent +  and prostrate +
erect +  and ascending +
villous;glabrous +
5 +  and 20 +
discoid +  and capitate +
deciduous +  and persistent +
distinct +
subterminal +  and terminal +
not elongate +
hairy +  and glabrous +
S. idahoensis +
Spiraea douglasii var. roseata +
Spiraea douglasii +
variety +
inconspicuous +
reduced +