Crataegus chrysocarpa var. vernonensis

J. B. Phipps & O’Kennon

Sida 21: 73, fig. 3. 2004.

Conservation concernEndemic
Treatment appears in FNA Volume 9. Treatment on page 599. Mentioned on page 597, 598.

Shrubs, 20–35 dm. Leaves: blade ovate to rhombic-ovate, base ± cuneate, sinuses: max LII 10–15%, lobe apex subacute, veins 3 or 4 per side, abaxial surface glabrous, veins pilose, adaxial appressed-scabrous-pubescent, persistent. Inflorescences: branches lanate. Flowers 18–20 mm diam.; hypanthium lanate proximally, glabrous distally; stamens 8–10, anthers pale-pink. Pomes burgundy to nearly black, suborbicular, 10–12 mm diam., pubescent.


Phenology: Flowering May; fruiting late Aug.
Habitat: Xeric habitats, sometimes sandy soil
Elevation: 300–400 m

Discussion

Of conservation concern.

Variety vernonensis is locally common in the northern Okanagan valley between Vernon and Salmon Arm. Because of its extreme habitat for a hawthorn and its early ripening, pomes are apt to shrivel by September, when pomes of other hawthorns in the area are usually still plump. Possibly that is why it is under-collected. For the same reason, the variety is seldom found growing among the larger, more mesomorphic sympatric hawthorns. The variety is among the earliest to flower of the hawthorns of its area.

Variety vernonensis is remarkably uniform in its diagnostic characteristics. The multi-stemmed, relatively little-branching, erect habit is conspicuous in well-developed plants, as are the lanate inflorescences, pale pink anthers, and pomes already ripe and burgundy in late August. These characters help to distinguish the taxon from other members of ser. Rotundifoliae, while the tendency to subacute lobes in the leaf helps to distinguish it in midsummer from rare lanate forms of sympatric var. chrysocarpa.

Selected References

None.

Lower Taxa

None.
appressed-scabrous-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
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 /> (7.5 cm75 mm <br />0.075 m <br />) +
purplish +  and yellow +
ovate +  and rhombic-ovate +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
elliptic +  and linear +
adnate +  and distinct +
crowded +, scattered +  and alternate +
not +  and aggregated +
300–400 m +
1.8 cm18 mm <br />0.018 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 />) +
yellowish +  and greenish brown or gray-brown +
appressed-pubescent +
Xeric habitats, sometimes sandy soil +
glabrous +  and lanate +
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 +  and serrate +
short-stipitate-glandular +
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 +
Flowering May +  and fruiting late Aug. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
burgundy +  and nearly black +
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 +
appressed +  and erect +
spreading +  and reflexed +
triangular +
4 cm40 mm <br />0.04 m <br /> (?) +
1-50-flowered +  and few-leaved +
concave +  and plane +
Conservation concern +  and Endemic +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus columbiana var. chrysocarpa +  and C. rotundifolia var. chrysocarpa +
Crataegus chrysocarpa var. vernonensis +
Crataegus chrysocarpa +
variety +
5 cm50 mm <br />0.05 m <br /> (7 cm70 mm <br />0.07 m <br />) +
black +  and dark mahogany +
straight +
less slender +  and more or less stout +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
straight +
determinate +
4 +  and 3 +