familyRosaceae
subfamilyRosaceae subfam. Amygdaloideae
tribeRosaceae tribe Spiraeeae
genusSpiraea
speciesSpiraea ×vanhouttei

Spiraea ×vanhouttei

Spiraea ×vanhouttei (Briot) Carrière

Rev. Hort. 48: 260. 1876.

Richard Lis
Common names: Bridal-wreath
Introduced
Basionym: Spiraea aquilegiifolia var. vanhouttei Briot Rev. Hort. 37: 269. 1866
Treatment appears in FNA Volume 9. Treatment on page 410. Mentioned on page 400, 409, 411.

Shrubs, 10–20 (–25) dm, not rhizomatous. Stems arching, virgate, branched. Leaves: petiole 2–7 mm; blade ovate or rhombic-ovate to obovate, 3–5 × 2–3 cm, membranous, base cuneate to obtuse, margins crenate to coarsely serrate on distal 1/2–3/4, irregularly doubly serrate, or, sometimes, 3–5 lobed (especially long-shoot leaves), venation suprabasal actinodromous, secondary-veins not prominent, apex acute, surfaces glabrous. Inflorescences mostly axillary (borne profusely along branches), corymbiform or hemispheric panicles, 3–6 × 3–6 cm; branches glabrous. Pedicels 5–10 mm, glabrous. Flowers 7–10 mm diam.; hypanthia campanulate, 1–1.5 mm, surfaces glabrous; sepals triangular, 1–1.5 mm; petals white to cream, orbiculate, 2–3 mm; staminodes 10–16, mostly distinct; stamens 20–25, 0.5 times petal length. Follicles falcate, 2–3 mm, glabrous.


Phenology: Flowering May–Jun; fruiting Jun–Oct.
Habitat: Old homesteads, pastures, roadsides, railways
Elevation: 0–2000 m

Distribution

V9 693-distribution-map.jpg

Introduced; N.S., Ont., Ark., Colo., Conn., Ill., Ky., La., Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.Mex., N.Y., N.C., Ohio, Pa., Utah, Va., Wash., W.Va., Asia (China), also in Europe

Discussion

Spiraea ×vanhouttei is widely planted as an ornamental near homes and along broadways. Concerning the potential for threat as an invasive or weedy species, R. B. Kaul (pers. comm.) has observed that it may persist for decades in old hedges and ornamental plantings; he has not seen any evidence of it volunteering or naturalizing and, despite repeated searches, has never seen a seed or seedling.

J. A. Harris (1917) questioned whether Spiraea ×vanhouttei had been proven to be the hybrid S. cantoniensis and S. trilobata. C. Sterling (1966) described the carpel anatomy of S. ×vanhouttei; but he did not examine the postulated parents. M. De Cleene and J. De Ley (1981) attempted to define the host range of infectious hairy-root (Agrobacterium rhizogenes) and correlate hosts with taxonomic relationships; they verified that S. prunifolia and S. ×vanhouttei are hosts to this disease but did not test other species of the genus.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property.

... more about "Spiraea ×vanhouttei"
RDF feed
Achene arrangement
aggregated +
Androecium position
perigynous +
Anther dehiscence
dehiscent +
Apex shape
acute +
Author
Richard Lis +
Authority
Spiraea ×vanhouttei (Briot) Carrière +
Bark coloration
reddish +  and dark-brown gray or gray-black +
Bark relief
not +  and exfoliating +
Basal leaf architecture
compound +  and simple +
Basal leaf arrangement
opposite +  and alternate +
Base shape
cuneate +  and obtuse +
Basionyms
Spiraea aquilegiifolia var. vanhouttei +
Blade arrangement or shape
elliptic +
Blade length
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Blade shape
rhombic-ovate +  and obovate +
Blade some measurement
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Blade texture
membranous +
Blade width
2 cm20 mm <br />0.02 m <br /> (?) +  and 3 cm30 mm <br />0.03 m <br /> (?) +
Bract presence
absent +
Bracteole presence
absent +
Branch pubescence
glabrous +
Carpel atypical quantity
5 (8) +
Carpel fusion
free +
Carpel pubescence
glabrate +  and tomentose +
Carpel quantity
5 (4) +
Cauline leaf architecture
simple +
Cauline leaf arrangement
alternate +
Cauline leaf growth form
dimorphic +
Common name
Bridal-wreath +
Distribution
N.S. +, Ont. +, Ark. +, Colo. +, Conn. +, Ill. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Pa. +, Utah +, Va. +, Wash. +, W.Va. +, Asia (China) +  and also in Europe +
Drupe arrangement
not +  and aggregated +
Drupelet arrangement
aggregated +
Elevation
0–2000 m +
Epicalyx bractlet presence
absent +
Epicalyx bractlet quantity
2 +  and 1 +
Flower diameter
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flower reproduction
unisexual +  and bisexual +
Foliation architecture
full +
Follicle arrangement
aggregated +
Follicle pubescence
glabrous +
Follicle shape
falcate +
Follicle some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Fruit atypical some measurement
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Fruit pubescence
tomentose +  and glabrous +
Fruit quantity
5;4;5;4;5;4;5;4;5;4 +
Fruit shape
list +  and count +
Fruit some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Fruit texture
coriaceous +
Fruits achene arrangement
not +  and aggregated +
Fruits follicle arrangement
not +  and aggregated +
Glomerule arrangement
fascicles +
Habitat
Old homesteads, pastures, roadsides, railways +
Hypanthium atypical some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Hypanthium duration
persistent +
Hypanthium pubescence
glabrous +  and hairy +
Hypanthium shape
campanulate +
Hypanthium some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Illustration copyright
Flora of North America Association +
Illustrator
Marjorie C. Leggitt +
Inflorescence architecture
(2-)3-1000+-flowered +
Inflorescence position
axillary +
Inflorescence position or structure subtype
terminal +
Integument architecture
crassinucellate +
Integument quantity
2 +
Introduced
true +
Leaf architecture
compound +  and simple +
Leaf arrangement
alternate +
Leaf duration
deciduous +
Margin architecture
actinodromous +
Margin architecture or shape
serrate +
Margin position
suprabasal +
Margin prominence or shape
flat +
Margin quantity
3 (?) +  and 5 (?) +
Margin shape
lobed +, crenate +  and coarsely serrate +
Nectar disc presence
absent +
Number of lower taxa
0 +
Nutlet arrangement
aggregated +
Ovary position
inferior +  and superior +
Ovule arrangement
biseriate +  and clustered +
Ovule arrangement or growth form
clustered +
Ovule atypical quantity
2 (4) +
Ovule position
collateral +  and apical +
Ovule quantity
2 +
Panicle architecture
corymbiform +
Panicle length
3cm +  and 6cm +
Panicle pubescence
glabrous +  and hairy +
Panicle shape
hemispheric +
Panicle width
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Pedicel presence
absent +
Pedicel pubescence
glabrous +
Pedicel some measurement
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Perianth position
perigynous +
Petal arrangement or shape
elliptic +
Petal atypical quantity
0 (?) +  and 4 (?) +
Petal coloration
white +  and cream +
Petal fusion
free +  and distinct +
Petal quantity
5 +
Petal shape
orbiculate +
Petal some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Petiole presence
absent +
Petiole some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Phenology
Flowering May–Jun +  and fruiting Jun–Oct. +
Pistil atypical quantity
250 (450) +
Pistil fusion
adnate +, free +, connate +  and distinct +
Pistil quantity
1;250 +
Publication title
Rev. Hort. +
Publication year
1876 +
Reference
None +
Secondary-vein prominence
not prominent +
Seed architecture
not arillate +
Seed atypical quantity
2 (12) +
Seed quantity
2;4 +
Seed shape
fusiform;oblong +
Seed some measurement
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.4 cm4 mm <br />0.004 m <br /> (?) +
Sepal atypical quantity
5 (10) +
Sepal duration
deciduous +  and persistent +
Sepal fusion
free +  and distinct +
Sepal orientation
reflexed +, erect +, ascending +  and spreading +
Sepal quantity
5 +
Sepal shape
triangular +
Sepal some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
Series quantity
2 +  and 4 +
Short-shoot length or size
long +
Short-shoot presence
absent +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V9/V9 693.xml +
Special status
Introduced +
Stamen atypical quantity
130 (220) +
Stamen fusion
free +  and distinct +
Stamen height or length or size
shorter +
Stamen length
0.5 times petal length +
Stamen length or size
shorter or longer +
Stamen quantity
20;25 +
Staminode function
nectariferous +
Staminode fusion
distinct +
Staminode presence
absent +
Staminode quantity
10;16 +
Staminode size
reduced +
Stem architecture
branched +  and virgate +
Stem coloration
reddish-brown +  and brown +
Stem growth form or orientation
decumbent +  and prostrate +
Stem life cycle
young +
Stem orientation
arching +
Stem pubescence
villous;glabrous +
Stem quantity
5 +  and 20 +
Stigma architecture or shape
discoid +  and capitate +
Stipule architecture
palmate +
Stipule architecture or shape
pinnate +
Stipule presence
absent +
Style duration
deciduous +  and persistent +
Style fusion
distinct +
Style position
subterminal +  and terminal +
Style position or structure subtype
terminal +
Style shape
not elongate +
Surface pubescence
glabrous +
Taxon family
Rosaceae +
Taxon name
Spiraea ×vanhouttei +
Taxon parent
Spiraea +
Taxon rank
species +
Torus development
developed +
Torus presence
absent +
Torus prominence
inconspicuous +
Torus size
reduced +
Volume
Volume 9 +
Whole organism architecture
not rhizomatous +
Whole organism duration
perennial +
Whole organism growth form
shrub +
Whole organism some measurement
10dm (20dm) +
X chromosome quantity
9 +