Crataegus viridis var. ovata

(Sargent) E. J. Palmer

Ann. Missouri Bot. Gard. 22: 561. 1935.

EndemicIllustrated
Basionym: Crataegus ovata Sargent Man. Trees, 402, fig. 321. 1905
Synonyms: C. blanda Sargent C. larga Sargent
Treatment appears in FNA Volume 9. Treatment on page 534. Mentioned on page 531, 532.

Stems: trunk bark gray, ± exfoliating, smooth; 1-year old twigs reddish-brown. Leaves: blade broadly elliptic to oblong-ovate, sometimes suborbiculate, 2.5–6.3 cm, thin, base broadly or acutely concave-cuneate, lobes 0 or 1 per side, very short, else rarely 1 per side, distinct, but not on most leaves, usually very short, sinuses shallow, max LII 5 (–20) %, lobe apex obtuse, margins finely crenate-serrate, rarely serrate, except base entire, teeth 1 mm, venation craspedodromous, sometimes semicamptodromous, veins 4 or 5 per side, midvein slender, apex subacute to acute, surfaces glabrous except abaxially with persistent axillary tufts of hairs, adaxially with scattered hairs near base of midvein. Inflorescences: branches glabrous. Flowers: hypanthium glabrous.


Phenology: Flowering early May; fruiting Oct.
Habitat: Moist, fertile, alluvial woodlands, agricultural derivatives of these
Elevation: 10–200 m

Distribution

V9 895-distribution-map.jpg

Ark., La., Miss., Mo., Tex.

Discussion

The range of var. ovata is not precisely documented and may be wider than noted. The variety appears to be well represented in Arkansas and Louisiana. The type specimen is of a rare form with particularly large leaves, some distinctively lobed, that is restricted to Missouri. A form with smaller and almost always unlobed leaves, also included here, is the most abundant of this variety. Intermediates with var. lanceolata and var. viridis are common. Forms with black scaly bark, relatively large flowers (said to be 20 mm diam.), thornless, and upland habitat were referred to Crataegus blanda, though specimens from the type tree have smaller (14–15 mm diam.) flowers. As the bark of C. viridis characteristically exfoliates in large flakes and is usually whitish or pale gray, the topland habitat of C. blanda, as well as the original collector’s comments on its bark, and its type, which cannot be differentiated from var. ovata in the herbarium, suggest that the nature of the mature bark may need to be taken into account more seriously in the taxonomy of this species. Rare ovata-like forms with pink anthers and growing in atypically dry habitats in northeastern Missouri, perhaps hybrid, may be referred to C. davisii Sargent and C. pechiana Sargent and perhaps no longer exist.

Selected References

None.

Lower Taxa

None.
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
ivory +  and cream +
James B. Phipps +
(Sargent) E. J. Palmer +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
concave-cuneate +
Crataegus ovata +
6 cm60 mm <br />0.06 m <br /> (7 cm70 mm <br />0.07 m <br />) +
suborbiculate +, broadly elliptic +  and oblong-ovate +
2.5 cm25 mm <br />0.025 m <br /> (6.3 cm63 mm <br />0.063 m <br />) +
linear-filiform +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ark. +, La. +, Miss. +, Mo. +  and Tex. +
not +  and aggregated +
10–200 m +
hard +  and mealy +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 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 +  and redbrown +
older +  and new +
Moist, fertile, alluvial woodlands, agricultural derivatives of these +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
(3-)10(-50)-flowered +
crassinucellate +
deciduous +
craspedodromous +
entire +, serrate +  and crenate-serrate +
serrate +  and crenate +
serrate to obscurely +
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 +  and glabrous +
0.7 cm7 mm <br />0.007 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering early May +  and fruiting Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
not pruinose +
yellow +, orange +  and deep red +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
orbicular +
Ann. Missouri Bot. Gard. +
not arillate +
persistent +
free +  and distinct +
triangular +
1-50-flowered +  and few-leaved +
distinct +
Endemic +  and Illustrated +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
C. blanda +  and C. larga +
Crataegus viridis var. ovata +
Crataegus viridis +
variety +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straight +
slender +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
craspedodromous +
1 cm10 mm <br />0.01 m <br /> (?) +
inconspicuous +
whitish to light gray +  and rough +
exfoliating +
less erect +  and oblique +
1 +  and several +
reddish-brown +
determinate +
few +  and abundant +
5 +  and 4 +
tree +  and shrub +