Crataegus castlegarensis

J. B. Phipps & O'Kennon

Sida 20: 121, figs. 3, 4. 2002.

Common names: Castlegar hawthorn
Endemic
Treatment appears in FNA Volume 9. Treatment on page 513. Mentioned on page 511.

Shrubs, 25–50 dm. Stems erect; branches spreading; 1-year old twigs brown; thorns on twigs usually branched, some paired or in triads, straight to slightly recurved, dark-brown with blackish tip young, 2–3 cm. Leaves: petiole 0.7–1.5 cm, pubescent, eglandular; blade oblanceolate to ovate-rhombic, 3.5–6 cm, lobes 3 or 4 per side, sinuses shallow to deep, lobe apex usually acute, margins serrate, teeth apices finally glandular young, venation craspedodromous, veins 4 or 5 per side, apex broadly triangular, abaxial surface sparsely hairy or glabrous except on veins, adaxial conspicuously appressed-pubescent young, glabrescent except on midvein. Inflorescences 12–20-flowered; branches sparsely to densely pubescent; bracteole margins stipitate-glandular. Flowers 12 mm diam.; hypanthium pubescent or glabrous; sepals triangular, 3 mm, margins remotely glandular-serrate; stamens 10, anthers pink; styles 3 or 4. Pomes crimson (mid Aug) turning to reddish plum or, ultimately, blackish purple, orbicular, ± oblate (recessed at junction with pedicel), 10 mm diam., sparsely pilose; sepals reflexed, apex obtuse; pyrenes 3 or 4, sides usually pitted. 2n = 68.


Phenology: Flowering May–Jun; fruiting Sep–Oct.
Habitat: Mesic brush
Elevation: 300–1200 m

Distribution

V9 863-distribution-map.jpg

Alta., B.C., Sask., Calif., Idaho, Mont., Oreg., Utah, Wash., Wyo.

Discussion

Crataegus castlegarensis occurs from around the northern Okanagan, British Columbia, to the northern California Coast Ranges, to northwestern Montana, and the Rocky Mountains to northeast of Salt Lake City, Utah. The species occurs also in the Cypress Hills of Alberta and Saskatchewan; it is found in habitats similar to those of C. douglasii and is at least as abundant as that species in a number of parts of its range.

Crataegus castlegarensis is readily recognized by a combination of hairy inflorescence branches, pomes more or less orbicular, crimson or burgundy (with irregular earlier ripening) around the third week of August, soon becoming purple, often when nearby C. douglasii is already black, as well as a tendency to possess thorns on the young twigs branched at the base to become double, triple, or even sometimes quadruple. Such multiple thorns, though sometimes abundant on a bush, are more often few and may require searching for. Inflorescence pubescence, as in other species with this characteristic, may become sparse by fruiting. Crataegus castlegarensis is most similar to C. douglasii; its fruit is usually more orbicular, even oblately so, than is normal in that species, sometimes even with a recessed junction to the pedicel like an apple.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus castlegarensis"
glabrous +  and hairy +
glabrescent +  and appressed-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 +
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 +
elliptic to more or less obovate rhombic oblanceolate or ovate +  and elliptic +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
oblanceolate +  and ovate-rhombic +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
? (?) +  and ? (?) +
stipitate-glandular +
orange +  and dark gray-brown +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Castlegar hawthorn +
Alta. +, B.C. +, Sask. +, Calif. +, Idaho +, Mont. +, Oreg. +, Utah +, Wash. +  and Wyo. +
not +  and aggregated +
300–1200 m +
12 cm120 mm <br />0.12 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 />) +
usually tan +  and deep mahogany +
pubescent +  and glabrous +
Mesic brush +
glabrous +  and pubescent +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
obscure +  and evident +
sessile-glandular +  and stipitate +
glandular-serrate +  and serrate +
subentire +
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 +
1.5 cm15 mm <br />0.015 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering May–Jun +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
blackish purple +, , +, reddish plum +  and crimson +
10 cm100 mm <br />0.1 m <br /> (?) +
oblate +  and orbicular +
not arillate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
persistent +
free +  and distinct +
triangular +
3 cm30 mm <br />0.03 m <br /> (?) +
1-50-flowered +  and few-leaved +
shallow +  and deep +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus castlegarensis +
Crataegus (sect. Douglasia) ser. Douglasianae +
species +
craspedodromous +
in triads +  and paired +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +  and stout +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
1 +  and few +
determinate +
5 +  and 4 +