Pyrus serrulata

Rehder

Proc. Amer. Acad. Arts 50: 234. 1915.

Common names: Serrulate pear
Introduced
Treatment appears in FNA Volume 9. Treatment on page 482. Mentioned on page 481.

Plants 80–100 dm. Branches purplish brown or dark-brown, brown-tomentose when young, glabrescent; thorns not recorded. Leaves: petiole 3.5–7.5 cm, brown-tomentose when young; blade ovate or narrowly ovate, 5–11 × 3.5–7.5 cm, base rounded or broadly cuneate, margins serrulate, apex acuminate, surfaces glabrous or brown-tomentose when young. Pedicels 3–5 cm, pubescent when young. Flowers 20–30 mm diam.; sepals triangular-ovate, 3 mm, apex acute or acuminate; petals white, broadly ovate, 10–12 mm; ovaries 3 (–4) -locular; styles 3 (or 4). Pomes dark-brown, subglobose or obovoid, 15–22 mm diam.; sepals mostly persistent. 2n = 34.


Phenology: Flowering Apr.
Habitat: Fields
Elevation: 300 m

Distribution

V9 812-distribution-map.jpg

Introduced; Mo., Asia (China)

Discussion

The tree nursery industry has associated the common name "red spire" with this species but that name is frequently applied also to Pyrus calleryana. Because it is sometimes referred to simply as "serrulata," the name "serrulate pear" seems appropriate. Pyrus serrulata has been considered a hybrid, P. calleryana × P. pyrifolia, but recent taxonomic work has accorded it specific rank. The only report of this species as an escape in North America is based on a fruiting specimen collected in Howell County, Missouri. Potential hybrids involving P. calleryana may resemble this species.

Selected References

None.

Lower Taxa

None.
... more about "Pyrus serrulata"
glabrous or +  and sparsely densely tomentose +
Paul M. Catling +  and Gisèle Mitrow +
Rehder +
persistent +
orangebrown +, reddish +  and gray +
compound +  and simple +
opposite +  and alternate +
cuneate +  and rounded +
9 cm90 mm <br />0.09 m <br /> (12 cm120 mm <br />0.12 m <br />) +
5 cm50 mm <br />0.05 m <br /> (11 cm110 mm <br />0.11 m <br />) +
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
? (?) +  and ? (?) +
3.5cm +  and 7.5cm +
dark-brown +  and purplish brown +
glabrescent +  and brown-tomentose +
adnate +  and connate +
Serrulate pear +
tomentose +  and glabrous +
umbel-like +
Mo. +  and Asia (China) +
not +  and aggregated +
glabrous +  and hairy +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
dotted +, yellow +, green +, red +  and brown +
0.8 cm8 mm <br />0.008 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Fields +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
crassinucellate +
deciduous +
crenulate +  and crenate +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
brown-tomentose +
3.5 cm35 mm <br />0.035 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
Flowering Apr. +
adnate +, free +, connate +  and distinct +
blackish +  and gray +
rectangular +
dark-brown +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
obovoid +  and subglobose +
Proc. Amer. Acad. Arts +
tomentose +  and glabrous +
umbel-like +
not arillate +
persistent +
free +  and distinct +
triangular-ovate +
3 cm30 mm <br />0.03 m <br /> (?) +
Introduced +
free +  and distinct +
branched +  and simple +
1 +  and many +
not +  and persistent +
distinct +
basal +, lateral +, subterminal +  and terminal +
elongate +
brown-tomentose +  and glabrous +
Pyrus serrulata +
species +
inconspicuous +
oval +  and pyramidal +