Crataegus okennonii J.B.Phipps

O'kennon's hawthorn (en)

Species

Angiosperms > Rosales > Rosaceae > Crataegus

Characteristics

Shrubs or trees, 30–100(–140) dm. Stems ?usually single-trunked?; 1-year old twigs deep mahogany, shiny, older gray-brown; thorns on twigs ?single?, slightly recurved, usually brown young, 2 cm. Leaves: (fall color plum to crimson or light crimson); petiole 1–2 cm, pubescence and glandularity not recorded; blade elliptic to broadly elliptic, sometimes ± narrowly ovate or rhombic, 4–6 cm, lobes 2 or 3 per side, lobe apex acute to ± obtuse, margins serrate, venation craspedodromous, veins 4 per side, apex subacute to obtuse, abaxial surface glabrous except on veins, adaxial finely appressed-pubescent. Inflorescences 12–20-flowered; branches glabrous, sometimes ± sparsely pubescent; bracteole margins stipitate-glandular. Flowers 15–20 mm diam.; hypanthium glabrous; sepals broadly triangular, 3 mm, margins obscurely glandular; stamens 10–12, anthers pale pink; styles 3 or 4. Pomes red-burgundy to chestnut or reddish brown (late Aug), deep purple to black at full maturity, ± ampulliform-orbicular, 8–10 mm diam., glabrous; sepal remnants reflexed, apex obtuse; pyrenes 3 or 4, sides ± eroded, sometimes plane. 2n = 68.
Life form annual
Growth form shrub
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 3.0 - 10.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 4-9
Soil humidity 3-7
Soil texture 1-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 180 - 730
Germination temperacture (C°) 10 - 15
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Crataegus okennonii world distribution map, present in Canada and United States of America

Conservation status

Crataegus okennonii threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:316580-2
WFO ID wfo-0000987034
COL ID Z89B
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Crataegus okennonii