Crataegus sheila-phippsiae var. saskatchewanensis

J. Bot. Res. Inst. Texas 1: 1079, plate 7.4c, fig. 25. 2007.

Common names: Saskatchewan hawthorn
Endemic
Treatment appears in FNA Volume 9. Treatment on page 597. Mentioned on page 596.

Plants shrubby, thicket-forming, 15–30 dm. Stems: thorns on twigs 3–6 cm. Leaf-blades 2–4 (–5) cm, at early anthesis little larger than flowers. Flowers: anthers white to cream. Pomes orange-red to bright red.


Phenology: Flowering May–Jun; fruiting Aug–Sep.
Habitat: Thickets
Elevation: 700–1000 m

Discussion

The main range of var. saskatchewanensis is the Cypress Hills; records are known also from the prairie regions of southern Saskatchewan. The differences from the type variety are considerable and constant, and var. saskatchewanensis is perhaps more similar to Crataegus chrysocarpa var. chrysocarpa although where sympatric its fruit is larger.

Selected References

None.

Lower Taxa

None.
hairy +  and glabrous +
glabrate +, scabrous +  and glabrescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
white +  and cream +
glabrous +  and pubescent +
James B. Phipps +
J. B. Phipps & O’Kennon +
orangebrown +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
Crataegus sect. Rotundifoliae +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
rhombic +
3.5 cm35 mm <br />0.035 m <br /> (5 cm50 mm <br />0.05 m <br />) +
elliptic +  and linear +
pilose +  and glabrous +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Saskatchewan hawthorn +
not +  and aggregated +
700–1000 m +
1.4 cm14 mm <br />0.014 m <br /> (2 cm20 mm <br />0.02 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 />) +
gray +, brown +  and green +
older +, old +  and new +
Thickets +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
stipitate-glandular +
deciduous +
glandular-serrate +
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 +
pubescent +
pubescent +  and glabrous +
Flowering May–Jun +  and fruiting Aug–Sep. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
orange-red +  and bright red +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
suborbicular +
J. Bot. Res. Inst. Texas +
nonaccrescent +
not arillate +
persistent +
free +  and distinct +
triangular +
1-50-flowered +  and few-leaved +
concave +  and plane +
shallow +  and deep +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus sheila-phippsiae var. saskatchewanensis +
Crataegus sheila-phippsiae +
variety +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
gray +, brown +  and dark blackish +
straight +
older +  and old +
moderately slender +  and stout +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
5 +  and 4 +
plant +  and shrubby +