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

Spiraea ×pyramidata

Spiraea ×pyramidata Greene

Pittonia 2: 221. 1892.

Richard Lis
Endemic
Synonyms: Spiraea menziesii var. pyramidata (Greene) Piper S. tomentulosa Rydberg
Treatment appears in FNA Volume 9. Treatment on page 408. Mentioned on page 400.

Shrubs, 3–15 dm. Stems erect to spreading, branched. Leaves: petiole 2–5 mm; blade elliptic to obovate, 2–6 (–9) × 0.5–4 cm, chartaceous, base cuneate, margins doubly serrate distally from middle, venation pinnate craspedodromous, secondary-veins prominent, apex acute to obtuse, abaxial surface puberulent to pubescent, adaxial glabrous. Inflorescences mostly terminal, hemispheric to obconic panicles, 5–15 × 3–10 cm height 1–1.5 times diam.; branches pubescent. Pedicels 1–3 mm, pubescent. Flowers 2–4 mm diam.; hypanthia hemispheric, 1 mm, abaxial surface tomentose, adaxial pubescent; sepals ovate, 1.5–2.5 mm; petals white to pink, ovate to obovate, 1.5–2.5 mm; staminodes 10–15; stamens 20–30, 2 times petal length. Follicles oblanceoloid, 1.5–2 mm, shiny, glabrous. 2n = 36.


Phenology: Flowering May–Jul; fruiting Jun–Nov.
Habitat: Disturbed sites, riparian zones, flood plains, scree slopes, dry canyon slopes, moist open forest and woodland edges, clearings, roadsides, railways, campsites, home or farm sites
Elevation: 200–1500 m

Distribution

V9 687-distribution-map.jpg

B.C., Idaho, Mont., Oreg., Wash.

Discussion

Examining morphological characters of the leaf and flower, tests of pollen viability, cytological study of chromosomes, cultivation studies of seeds, cuttings, and live plants, assessment of pollinators, and controlled hybrid experiments led W. J. Hess (1969) to conclude that Spiraea ×pyramidata is a natural hybrid of S. douglasii var. menziesii and S. lucida. Hess found also that populations of S. ×pyramidata in Washington are more distinct and no introgression appeared to occur from the parental taxa; populations in British Columbia were less distinct and had more mixed populations with hybrids, parents, and probable introgressants. Hess determined that S. ×pyramidata is particularly adapted to colonization of open disturbed sites such as roadsides, railways, forest camps, and homesteads that occur in proximity to both parents. Once established, the hybrid spreads extensively by rhizomes.

Selected References

None.

Lower Taxa

None.
... more about "Spiraea ×pyramidata"
RDF feed
2n chromosome quantity
36 +
Abaxial surface pubescence
tomentose +, puberulent +  and pubescent +
Achene arrangement
aggregated +
Adaxial leaf pubescence
glabrous +
Adaxial surface pubescence
pubescent +
Androecium position
perigynous +
Anther dehiscence
dehiscent +
Apex shape
acute;obtuse +
Author
Richard Lis +
Authority
Spiraea ×pyramidata Greene +
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 +
Blade arrangement or shape
elliptic +
Blade atypical length
6 cm60 mm <br />0.06 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Blade length
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Blade pubescence or texture
chartaceous +
Blade shape
elliptic +  and obovate +
Blade some measurement
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Blade texture
coriaceous +, chartaceous +  and membranous +
Blade width
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 4 cm40 mm <br />0.04 m <br /> (?) +
Bract presence
absent +
Bracteole presence
absent +
Branch pubescence
pubescent +
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 +
Distribution
B.C. +, Idaho +, Mont. +, Oreg. +  and Wash. +
Drupe arrangement
not +  and aggregated +
Drupelet arrangement
aggregated +
Elevation
200–1500 m +
Epicalyx bractlet presence
absent +
Epicalyx bractlet quantity
2 +  and 1 +
Flower diameter
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Flower reproduction
unisexual +  and bisexual +
Foliation architecture
full +
Follicle arrangement
aggregated +
Follicle pubescence
glabrous +
Follicle reflectance
shiny +
Follicle shape
oblanceoloid +
Follicle some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 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
Disturbed sites, riparian zones, flood plains, scree slopes, dry canyon slopes, moist open forest and woodland edges, clearings, roadsides, railways, campsites, home or farm sites +
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
hemispheric +
Hypanthium some measurement
1 cm10 mm <br />0.01 m <br /> (?) +
Illustration copyright
Flora of North America Association +
Illustrator
Marjorie C. Leggitt +
Inflorescence architecture
(2-)3-1000+-flowered +
Inflorescence height
1-1.5 times diam +
Inflorescence length
5 cm50 mm <br />0.05 m <br /> (?) +  and 15 cm150 mm <br />0.15 m <br /> (?) +
Inflorescence position
axillary +  and terminal +
Inflorescence position or structure subtype
terminal +
Inflorescence shape
hemispheric +  and obconic +
Inflorescence width
3 cm30 mm <br />0.03 m <br /> (?) +  and 10 cm100 mm <br />0.1 m <br /> (?) +
Integument architecture
crassinucellate +
Integument quantity
2 +
Leaf architecture
compound +  and simple +
Leaf arrangement
alternate +
Leaf duration
deciduous +
Margin architecture
craspedodromous +
Margin architecture or shape
pinnate +  and serrate +
Margin prominence or shape
flat +
Margin shape
toothed +, unlobed +  and lobed +
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
racemiform +  and corymbiform +
Panicle pubescence
glabrous +  and hairy +
Pedicel presence
absent +
Pedicel pubescence
pubescent +
Pedicel some measurement
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Perianth position
perigynous +
Petal arrangement or shape
elliptic +
Petal atypical quantity
0 (?) +  and 4 (?) +
Petal coloration
white +  and pink +
Petal fusion
free +  and distinct +
Petal quantity
5 +
Petal shape
ovate;obovate +
Petal some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Petiole presence
absent +
Petiole some measurement
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Phenology
Flowering May–Jul +  and fruiting Jun–Nov. +
Pistil atypical quantity
250 (450) +
Pistil fusion
adnate +, free +, connate +  and distinct +
Pistil quantity
1;250 +
Publication title
Pittonia +
Publication year
1892 +
Reference
None +
Secondary-vein prominence
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
ovate +
Sepal some measurement
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 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 687.xml +
Special status
Endemic +
Stamen atypical quantity
130 (220) +
Stamen fusion
free +  and distinct +
Stamen height or length or size
shorter +
Stamen length
2 times petal length +
Stamen length or size
shorter or longer +
Stamen quantity
20;30 +
Staminode function
nectariferous +
Staminode presence
absent +
Staminode quantity
10;15 +
Staminode size
reduced +
Stem architecture
branched +
Stem coloration
reddish-brown +  and brown +
Stem growth form or orientation
decumbent +  and prostrate +
Stem life cycle
young +
Stem orientation
erect +  and spreading +
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
hairy +  and glabrous +
Synonyms
Spiraea menziesii var. pyramidata +  and S. tomentulosa +
Taxon family
Rosaceae +
Taxon name
Spiraea ×pyramidata +
Taxon parent
Spiraea +
Taxon rank
species +
Torus development
developed +
Torus presence
absent +
Torus prominence
inconspicuous +
Torus size
reduced +
Volume
Volume 9 +
Whole organism architecture
rhizomatous +
Whole organism duration
perennial +
Whole organism growth form
shrub +
Whole organism some measurement
3dm (15dm) +
X chromosome quantity
9 +