Pyracantha koidzumii (Hayata) Rehder

Formosa firethorn (en), Pyracantha de Koidzumi (fr)

Species

Angiosperms > Rosales > Rosaceae > Pyracantha

Characteristics

Shrubs caespitose. Branchlets dark gray, often thornlike, initially pubescent, glabrous when old. Leaves usually 3–5-fascicled; petioles ca. 3 mm, puberulous; leaf blade narrowly elliptic to narrowly obovate, 3–4.5 × 0.7–1.2 cm, abaxially glaucescent, densely pubescent when young, glabrescent, adaxially glabrous, base cuneate, margin entire, apex slightly emarginate or truncate. Corymb 3–4 cm in diam., many flowered; peduncle sparsely pubescent; bracts caducous, lanceolate. Pedicel 5–11 mm, sparsely pubescent. Flowers 8–10 mm in diam. Hypanthium campanulate, abaxially densely pubescent. Sepals triangular, 1–1.2 mm, abaxially densely pubescent when young, apex acute. Petals suborbicular or broadly elliptic, 3.5–4 × 3–4 mm, apex slightly emarginate. Stamens 20; filaments 2–3 mm. Ovary pubescent; styles nearly as long as stamens. Pome orangish red, depressed-globose, 4–5 mm. Fr. Aug–Nov.
More
Plants 5–40 dm. Stems: thorns sparse to abundant; young twigs reddish brown-hairy, glabrescent. Leaves: stipules 3–8 mm; petiole 1–3 mm; blade oblanceolate or narrowly obovate, 2.5–4.5 × 0.5–1.2 cm, base cuneate, margins entire, rarely with minute teeth near apices, apex truncate or retuse, rarely rounded, abaxial surface brown-hairy, becoming glabrate and pale green, not glaucescent, adaxial glabrous. Inflorescences 3–4 cm diam. Pedicels 5–12 mm, sparsely brown-hairy. Flowers 8–10 mm diam.; hypanthium densely hairy; ?calyx brown-or yellowish brown-puberulent when young, glabrescent?, sepals triangular, 1–1.3 mm, apex acute; petals suborbiculate, 3–4 mm, apex slightly emarginate. Pomes orange-red, 4–7 mm diam.; pedicels 5–13 mm.
A shrub. It grows 3.5-4.5 m high and spreads 3.5 m wide. It has many branches. The young stem are reddish and have a down. They become smooth and purple. The leaves are dark green and glossy above but paler underneath. The flowers are small and white. The fruit is a berry. The colour can vary but they are often orange or scarlet.
Life form
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) 3.5
Mature height (meter) 3.75 - 4.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a temperate plant. It grows in rocky valleys and seashores. It suits hardiness zones 7-10.
More
Rocky valley areas, seashores, thickets, among shrubs.
Light 4-9
Soil humidity 4-6
Soil texture 2-5
Soil acidity 3-7
Soil nutriment -
Hardiness (USDA) 7-10

Usage

Uses environmental use medicinal
Edible fruits
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings or seedlings. Seeds needs stratification.
Mode cuttings seedlings
Germination duration (days) 40 - 180
Germination temperacture (C°) 10
Germination luminosity -
Germination treatment stratification
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Pyracantha koidzumii leaf picture by Johnny Poppyseed (cc-by-sa)
Pyracantha koidzumii leaf picture by Johnny Poppyseed (cc-by-sa)

Fruit

Pyracantha koidzumii fruit picture by Johnny Poppyseed (cc-by-sa)

Distribution

Pyracantha koidzumii world distribution map, present in Australia, China, Costa Rica, Guatemala, Mexico, Taiwan, Province of China, and United States of America

Conservation status

Pyracantha koidzumii threat status: Endangered

Identifiers

LSID urn:lsid:ipni.org:names:730619-1
WFO ID wfo-0001014300
COL ID 4QPYB
BDTFX ID 101766
INPN ID 621669
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cotoneaster koidzumii Pyracantha koidzumii Cotoneaster formosanus Cotoneaster taitoensis Pyracantha formosana Pyracantha koidzumii var. taitoensis