Crataegus phippsii

O'Kennon

Sida 18: 185, figs. 7, 9a–c. 1998.

Endemic
Treatment appears in FNA Volume 9. Treatment on page 508. Mentioned on page 503, 552.

Shrubs or trees, 50–60 (–70) dm. Stems: main trunk usually present, sometimes suckering; twigs: new growth densely short-pubescent, 1-year old dark purple-brown, older dark gray; thorns on twigs few, slightly recurved, deep brown to black, ± slender, 2–4 cm. Leaves: petiole 1.5–2 cm, hairy, glandularity not recorded; blade broadly elliptic to ovate or broadly deltate-ovate, 4–8 cm (–10 cm on extension shoots), becoming ± coriaceous, base cuneate to very broadly cuneate, lobes 3 per side, sinuses ± shallow, lobe apex rounded to broadly angled, margins short-serrate, veins 4 (or 5) per side, apex obtuse or subacute, abaxial surface subglabrous or glabrescent, veins persistently short-hairy, adaxial short-appressed-hairy. Inflorescences 6–12-flowered; branches densely short-tomentose; bracteole margins stipitate or sessile-glandular. Flowers 15–22 mm diam.; hypanthium densely tomentose, disc interior glabrous, bristly at center; sepals broadly triangular, 4–5 mm, margins glandular-serrate, apex subacute, abaxially pubescent (especially near base); stamens 10, anthers pale-pink; styles 2–4, stigmas capitate. Pomes red to plum purple (Aug) to nearly black (Sep), ± orbicular to broadly ovoid, 12 mm diam., short-pubescent; sepals erect-patent to patent-incurved, 4–5 mm; pyrenes 3, sides irregularly eroded or ± plane. 2n = 68.


Phenology: Flowering May; fruiting Sep–Oct.
Habitat: Brush, natural hedgerows on mesic soil
Elevation: 300–700 m

Discussion

Crataegus phippsii is found from the Okanagan Valley, southern British Columbia and northwestern Washington, to near Flathead Lake, Montana.

Crataegus phippsii is one of the more distinctive North American hawthorns and does not appear to be closely similar to any other known in the west. The plants are large, somewhat reminiscent of C. mollis in foliage, habit, and pubescence; in its fruit (red changing to purple to black) there is a color change similar to those in other species in this series. The bracteoles are smaller than in the mollis group, caducous and membranous, and bright crimson when fresh. The light gray bark flakes off in long narrow strips, which is unusual in Crataegus.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus phippsii"
glabrescent +  and subglabrous +
short-appressed-hairy +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
James B. Phipps +
O'Kennon +
exfoliating +  and plated +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
compound +  and simple +
opposite +  and alternate +
cuneate +  and cuneate to very +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
broadly elliptic +  and ovate or broadly deltate-ovate +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
sessile-glandular +  and stipitate +
dark gray-brown +
short-tomentose +
adnate +  and distinct +
crowded +, scattered +  and alternate +
bristly +  and glabrous +
B.C. +, Mont. +  and Wash. +
not +  and aggregated +
300–700 m +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
yellow +  and red or purplish +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dark gray +  and dark purple-brown +
older +, old +  and new +
short-pubescent +
Brush, natural hedgerows on mesic soil +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
obscure +  and evident +
glandular-serrate +  and short-serrate +
denticulate +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
elliptic +  and circular +
0 (?) +  and 4 (?) +
free +  and distinct +
post-mature +
glandular +  and eglandular +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering May +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
coriaceous-leaved +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
red +  and plum purple +
12 cm120 mm <br />0.12 m <br /> (?) +
short-pubescent +
less orbicular +  and broadly ovoid +
not arillate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
persistent +
free +  and distinct +
erect-patent +  and patent-incurved +
triangular +
accrescent +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus phippsii +
Crataegus (sect. Douglasia) ser. Purpureofructus +
species +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
brown +  and black +
straight +
slender +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
craspedodromous +
inconspicuous +
1 +  and few +
straight +
determinate +
short-hairy +
tree +  and shrub +