Crataegus saligna

Greene

Pittonia 3: 99. 1896.

Common names: Willow hawthorn
Endemic
Synonyms: Crataegus douglasii var. duchesnensis S. L. Welsh
Treatment appears in FNA Volume 9. Treatment on page 509. Mentioned on page 500, 501, 508, 510.

Shrubs, 30–50 dm, often clonal. Stems: twigs: new growth green, glabrous, 1-year old reddish tan, older deep gray; bark on younger 2–5 cm thick branches mainly dark (with horizontal lenticels); thorns on twigs straight (often needlelike) or recurved, 2-years old black, shiny, ± fine, 1–3 cm (sometimes bigger and stouter). Leaves: petiole 0.8–1.8 cm; blade narrowly elliptic to bluntly elliptic-lanceolate, 3–5 cm, ± coriaceous, base narrowly cuneate, lobes 0, margins crenate, teeth numerous, small, obtuse, venation semicamptodromous, veins 6–9 (–12) per side, apex usually obtuse, sometimes acute, abaxial surface glabrous, adaxial appressed-pubescent young, glabrescent. Inflorescences 12-flowered; branches not glandular-punctate; bracteoles early caducous, few, margins eglandular or sessile-glandular. Flowers 10–13 mm diam.; sepals proximally broadly triangular with short, narrower limbs, 1.5–2 mm, margins not recorded, apex acute, pubescence not recorded; stamens 20, anthers cream; styles 5. Pomes black mature, orbicular, 8 mm diam.; sepals suberect, 1.5–2 mm, tips reflexed; pyrenes 3–5, sides irregular. 2n = 34, 51.


Phenology: Flowering May–Jun; fruiting Sep–Oct.
Habitat: Along streams, flood plains
Elevation: 1600–2400 m

Discussion

Crataegus saligna is restricted to intermontane areas of northeastern Utah and adjacent Colorado; it may be locally plentiful and the plants flower early. The species may be confused with C. rivularis; it differs by its smaller flowers, fruit, and foliage, 20 stamens, cream anthers, and leaves relatively narrower, more venous, and with smaller, more obtuse teeth. It is more similar in flower and foliage to C. brachyacantha but has very different thorns and bark color, as well as irregular lateral faces of pyrenes.

Crataegus saligna is a striking plant with its suckering habit, its glowing copper-tan bark, long arching twigs and branches, dark green foliage, narrow and more or less lanceolate leaves, often beautifully reddish bronze foliage in fall, and black fruit.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus saligna"
glabrescent +  and appressed-pubescent +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
pink-purple to purple +
James B. Phipps +
Greene +
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 +
less elliptic +  and rhombic-elliptic +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
narrowly elliptic +  and bluntly elliptic-lanceolate +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
not glandular-punctate +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Willow hawthorn +
Colo. +  and Utah. +
not +  and aggregated +
1600–2400 m +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 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 +, reddish tan +  and green +
older +, old +  and new +
Along streams, flood plains +
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 eglandular +
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 +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Flowering May–Jun +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
8 cm80 mm <br />0.08 m <br /> (?) +
orbicular +
not arillate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
persistent +
free +  and distinct +
triangular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus douglasii var. duchesnensis +
Crataegus saligna +
Crataegus (sect. Douglasia) ser. Cerrones +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
craspedodromous +  and gland-tipped +
inconspicuous +
1 +  and few +
straight +
determinate +
6 +  and 9 +
shrub +  and clonal +