Sorbus intermedia

(Ehrhart) Persoon

Syn. Pl. 2: 38. 1806.

Common names: Swedish whitebeam
Introduced
Basionym: Pyrus intermedia Ehrhart Gartenkalender 4: 197. 1784
Synonyms: Aria intermedia (Ehrhart) Schur
Treatment appears in FNA Volume 9. Treatment on page 437. Mentioned on page 435.

Trees, to 70 [–200] dm. Stems 1; bark gray; winter buds green to redbrown, ovoid, 5–12 mm, shiny, slightly glutinous, whitish-villous. Leaves simple; stipules early deciduous, densely whitish-villous; blade shiny, green to dark green adaxially, ovate to elliptic, 6–13 × 3.5–8.5 cm, margins proximally 4–7 pinnately lobed, lobes ± oblong, 1–1.5 (–1.8) cm wide, basal sinuses deepest, margins distally coarsely serrate, main pairs of secondary-veins 8–10, apex acute to obtuse, abaxial surface white-tomentose, adaxial glabrous or sparsely villous, indument usually persistent. Panicles 18–85-flowered, rounded, 6–17 cm diam.; peduncles white-tomentose. Pedicels white-tomentose. Flowers 14–16 mm diam.; hypanthium whitish-tomentose, hypanthium plus sepals 5–6 mm; sepals 1.5–2.5 mm, margins villous and eglandular, rarely with inconspicuous glands; petals white, elliptic to broadly ovate, 5–7 mm; stamens 20; carpels distinct, apex conic, styles 2, 2.5–4 mm. Infructescences thinly white-tomentose to glabrate. Pomes bright red, ellipsoid, sometimes narrowly obovoid, 7–16 × 6–11 mm, shiny, faintly glaucous; lenticels few; sepals inconspicuous, erect, villous toward apex. Seeds redbrown, narrowly ovoid, 6–6.5 × 2.5–3.1 mm, slightly asymmetric, slightly flattened. 2n = 68 (Europe).


Phenology: Flowering spring; fruiting fall.
Habitat: Thickets, roadsides, waste ground, disturbed conifer forests
Elevation: 0–100 m

Distribution

V9 735-distribution-map.jpg

Introduced; B.C., Ont., Mass., Wash., Europe

Discussion

Sorbus aria (Linnaeus) Crantz of Europe has been reported from San Juan County, Washington (S. Atkinson and F. Sharpe 1993; J. T. Kartesz and C. A. Meacham 2003). Those populations are S. intermedia, with more deeply lobed leaves and broader winter buds.

Selected References

None.

Lower Taxa

None.
... more about "Sorbus intermedia"
villous +  and glabrous +
Peter F. Zika +  and Stéphane M. Bailleul +
(Ehrhart) Persoon +
compound +  and simple +
opposite +  and alternate +
not +  and clawed +
Pyrus intermedia +
green +  and dark green +
6 cm60 mm <br />0.06 m <br /> (13 cm130 mm <br />0.13 m <br />) +
ovate +  and elliptic +
5 cm50 mm <br />0.05 m <br /> (33 cm330 mm <br />0.33 m <br />) +
? (?) +  and ? (?) +
3.5cm +  and 8.5cm +
glutinous +
green +  and redbrown +
whitish-villous +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
odd +  and simple +
divided +  and lobed +
tanniferous +
Swedish whitebeam +
B.C. +, Ont. +, Mass. +, Wash. +  and Europe +
not +  and aggregated +
0–100 m +
single-layered +
1.4 cm14 mm <br />0.014 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
rancid +, unpleasant +  and strong +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
yellow +, brown +, red +  and orange +
glabrous +, hairy +  and glaucous +
0.4 cm4 mm <br />0.004 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
inconspicuous +
Thickets, roadsides, waste ground, disturbed conifer forests +
green +  and red +
whitish-tomentose +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
thinly white-tomentose +  and glabrate +
crassinucellate +
deciduous +
alternate +  and opposite +
oblong +  and lanceolate or oblanceolate +
1cm +  and 1.5cm +
4 +  and 7 +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
3 +  and 2 +
18-85-flowered +
6 cm60 mm <br />0.06 m <br /> (17 cm170 mm <br />0.17 m <br />) +
hairy +, glaucous +  and glabrous +
white-tomentose +
white-tomentose +
0 (?) +  and 4 (?) +
free +  and distinct +
2 +  and 5 +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering spring +  and fruiting fall. +
adnate +, free +, connate +  and distinct +
bright red +
0.7 cm7 mm <br />0.007 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
obovoid +  and ellipsoid +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
not arillate +
0.6 cm6 mm <br />0.006 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
flattened;ovoid +
0.25 cm2.5 mm <br />0.0025 m <br /> (?) +  and 0.31 cm3.1 mm <br />0.0031 m <br /> (?) +
deciduous +  and persistent +
free +  and distinct +
inconspicuous +
triangular +  and ovate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Introduced +
free +  and distinct +
branched +  and simple +
ascending +  and erect +
short-adnate +  and free +
whitish-villous +
persistent +
distinct +
basal +, lateral +, subterminal +  and terminal +
elongate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glaucous +, hairy +  and glabrous +
Aria intermedia +
Sorbus intermedia +
Sorbus subg. Aria +
species +
inconspicuous +
hairy +  and glabrous +