Crataegus sheila-phippsiae

J. B. Phipps & O’Kennon

Sida 21: 67, fig. 2. 2004.

Endemic
Treatment appears in FNA Volume 9. Treatment on page 596. Mentioned on page 594.

Shrubs, arborescent, 30–50 dm, or thicket-forming, 15–30 dm. Stems: twigs: new growth green, glabrous, 1-year old shiny, brown, older gray; thorns on twigs straight or slightly recurved, 1-year old shiny, dark blackish brown, older deep gray, moderately slender to stout, 2–6 cm. Leaves: petiole length 28–40% blade, pubescent, sparsely to densely persistently glandular; blade green mature, ± rhombic, (2–) 3.5–5 (–6) cm (2.5–5 cm at flowering), thin-chartaceous, base cuneate, lobes 2–4 per side, sinuses: max LII 20%, lobe apex acute, margins serrate, teeth small, veins 4 or 5 per side, apex acuminate, abaxial surface glabrous, hairy in axils and parts of main veins, adaxial scabrous. Inflorescences 3–18-flowered; branches glabrous or sparsely pilose young; bracteoles linear, membranous, margins sessile-glandular. Flowers 14–20 mm diam.; hypanthium glabrous; sepals triangular, length not recorded, margins barely glandular-serrate; stamens 18–20, anthers white to pale-pink, sometimes medium pink or puce; styles 4 or 5 (arising from small tuft of hairs). Pomes brilliant orange-red or crimson scarlet early, becoming bright red or dark burgundy, suborbicular, 10–12 mm diam., glabrous; sepals spreading; pyrenes 4 or 5.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Plants arborescent, 30–50 dm; anthers white to pale pink; thorns on twigs 2–4 cm; leaf blades 4–6 cm, at early anthesis larger than flowers; pomes burgundy, sometimes darker; British Columbia. Crataegus sheila-phippsiae var. sheila-phippsiae
1 Plants shrubby, thicket-forming, 15–30 dm; anthers white to cream; thorns on twigs 3–6 cm; leaf blades 2–4(–5) cm, at early anthesis little larger than flowers; pomes orange-red to bright red; s Saskatchewan. Crataegus sheila-phippsiae var. saskatchewanensis
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 />) +
puce +, pink +, white +  and pale-pink +
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 +
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 +
B.C. +  and Sask. +
not +  and aggregated +
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 +
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 +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
dark burgundy +, bright red +, crimson scarlet +, orange-red +  and brilliant +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
suborbicular +
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 +
Crataegus (sect. Coccineae) ser. Rotundifoliae +
species +
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 +
5 +  and 4 +