Crataegus viridis var. velutina

(Sargent) J. B. Phipps

J. Bot. Res. Inst. Texas 1: 1009. 2007.

Endemic
Basionym: Crataegus velutina Sargent Trees & Shrubs 2: 238. 1913
Synonyms: C. micrantha Sargent
Treatment appears in FNA Volume 9. Treatment on page 535. Mentioned on page 531, 532.

Stems: trunk bark black, rough; 1-year old twigs gray. Leaves: blade ± lanceolate to narrowly ovate, broadly elliptic, or oblanceolate, 3–5 cm, thin, base rounded-cuneate, lobes 0 or obscure, margins serrulate-crenate, mainly in distal 2/3, sometimes entire, teeth 1 mm, venation craspedodromous, sometimes semicamptodromous, veins 3–7 per side (often dividing before margin), apex acute to subacute, surfaces silky young, variably glabrescent, except abaxially with hair-tufts in vein-axils. Inflorescences: branches densely pubescent young, sparsely scabrous-pubescent by anthesis. Flowers: hypanthium hairy.


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

Discussion

Variety velutina is concentrated in western Arkansas, western Louisiana, and eastern Texas. Similar forms that are less velutinous when young are found in Florida.

Variety velutina is easily recognized in young foliage and at anthesis; it has virtually no intermediates with the glabrous varieties of Crataegus viridis. By anthesis, the adaxial leaf surfaces are usually only sparsely hairy and by fruiting they are usually glabrous. The strong tendency to glabrescence may explain the relatively small percentage of fruiting specimens noted for this variety.

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) J. B. Phipps +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
rounded-cuneate +
Crataegus velutina +
6 cm60 mm <br />0.06 m <br /> (7 cm70 mm <br />0.07 m <br />) +
less lanceolate +  and narrowly ovate broadly elliptic or oblanceolate +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
linear-filiform +
scabrous-pubescent +  and pubescent +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Ark. +, La. +  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 +
serrulate-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 Apr +  and fruiting Sep–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 +
J. Bot. Res. Inst. Texas +
not arillate +
persistent +
free +  and distinct +
triangular +
1-50-flowered +  and few-leaved +
deep +  and shallow +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrescent +  and silky +
C. micrantha +
Crataegus viridis var. velutina +
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 +
thin-exfoliating +
less erect +  and oblique +
1 +  and several +
determinate +
few +  and abundant +
3 +  and 7 +
tree +  and shrub +