Catha edulis (Vahl) Forssk. ex Endl.

Khat (en)

Species

Angiosperms > Celastrales > Celastraceae > Catha

Characteristics

Tree 2–15(–25) m. high; branches pale grey-green and flattened when young, becoming vinous red, terete.. Leaf-lamina dark green or greyish green and glossy above, paler beneath, oblong to elliptic or obovate, (3.7–)5.5–11 × (0.8–)1.5–4.5(–6) cm., acute to acuminate or more rarely obtuse at the apex, with margin markedly glandular-crenulate-denticulate, cuneate to attenuate at the base, coriaceous or subcoriaceous, with densely reticulate venation more prominent beneath than above; petiole 3–10 mm. long.. Cymes 1–2.3 cm. long, rather dense, with peduncle 6–12 mm. long; pedicels very short or up to 2 mm. long; flowers many in each cyme, 2–3 mm. in diameter.. Sepals broadly ovate to semicircular, rounded, 0.5–0.7 mm. long, with margin ciliate-fimbriate.. Petals elliptic-oblong, 1–1.5 mm. long, sessile, with margin ciliolate and paler in colour.. Stamens shorter than petals, with filaments 0.7–1 mm. long.. Disc 1–1.5 mm. in diameter.. Ovary broadly ovoid; styles less than 0.5 mm. long, slender; stigmas small.. Capsule red, narrowly oblong-3-gonous, 6–10 mm. long, pendulous.. Seeds dark brown, rugose-papillose, with narrow wing 2–2.5 times as long.. Fig. 5.
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Evergreen shrubs, 1-5 m tall; young branches with white, fine lenticels. Petiole 3-8 mm; leaf blade elliptic or narrowly elliptic, 4-7 × 2-4 cm, leathery, base narrowly attenuate, slightly decurrent, margin obtusely serrate, apex obtusely shortly acuminate. Cymes single, small, 1.5-2 × as wide; peduncle 5-10 mm, 2-4-branched, branches short, less than 3 mm; pedicel 1-3 mm, up to 5 mm in fruit. Flowers 3-5 mm in diam.; sepals 5, triangular-ovate, ca. 1 mm; petals 5, white, narrowly ovate or narrowly oblong. Stamens 5, filamentous, shorter than corolla. Ovary free, surrounded by disk; stigma 3-lobed. Capsule orange-red, cylindric, ca. 8 × 3-4 mm, dehiscing from above, loculicidally in 3 valves, usually only 1 seed maturing per valve. Seeds black-brown, narrowly ovoid, 3-4 mm, with membranous basal wing.
A shrub or small evergreen tree. It grows to 7-18 m high and spreads 3 m across. Trees that are regularly harvested are smaller. The stem is erect. The bark is grey and smooth when young. It becomes dark brown and flaky at maturity. The branches hang downwards. The leaves are simple and opposite. The leaves are glossy green and oval. They are 5-11 cm long and the edges of the leaf have small teeth. Leaves are paler underneath. The leaf stalks are reddish and about 1 cm long. The flowers are very small and pale green to white and with 5 petals. They occur in small clusters in the axils of leaves. The clusters are up to 2 cm across. The fruit has 3 lobes. It is a woody capsule about 1 cm long. It is reddish brown when mature. It contains many small winged seeds.
Evergreen tree, up to 15 m high. Branchlets with waxy bloom, flattened, becoming vinous red or pinkish and terete. Leaves subleathery; lamina oblong, elliptic or obovate, 30-50(-110) x 8-45(-60) mm, apex obtuse, acute to acuminate, base cuneate to angustate, margins glandular-toothed; dense reticulate venation more prominent below than above; petioles 3-10 mm long. Inflorescences axillary cymes. Flowers 5-merous, greenish white; peduncle 6-12 mm long. Sepals broadly ovate, ± 0.5 mm long, margins ciliate-fimbriate. Petals elliptic-oblong, 1-2 mm long, margins ciliolate. Ovary broadly ovoid; style short. Fruit a 3-valved capsule, narrowly oblong-trigonous, 6-10 mm long, smooth, reddish to brown. Seeds with basal wing, exarillate.
Leaves with lamina dark green or greyish-green and glossy above, paler beneath, (3·7)5·5–11 × (0·8)1·5–4·5(6) cm., oblong to elliptic or obovate, acute to acuminate or more rarely obtuse at the apex, with margin markedly glandular-crenulate-denticulate, cuneate to angustate at the base, coriaceous or subcoriaceous, with densely reticulate venation more prominent below than above; petiole 3–10 mm. long; stipules c. 2 mm. long, triangular-acicular.
Evergreen tree, up to 25 m high. Leaves opposite, lamina ovate-lanceolate to elliptic, 50-100 x 15-30 mm, venation prominent, margin serrate. Seed with white, wing-like aril.
Petals 1–1·5 mm. long, elliptic-oblong, with margin ciliolate and paler in colour (at least when dry).
Tree 2–15(25) m. high; stems pale grey-green and flattened when young, becoming vinous red, terete.
Sepals 0·5–0·7 mm. long, broadly ovate to semicircular, rounded, with margin ciliate-fimbriate.
Flowers ?; peduncle 6–12 mm. long; bracts 0·5–1 mm. long, acicular to triangular.
Capsule red, 6–10 mm. long, narrowly oblong-3-gonous, pendulous.
Seeds rugose-papillose, with a basal wing.
Ovary broadly ovoid; styles short.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) 3.0
Mature height (meter) 11.0 - 15.0
Root system -
Rooting depth (meter) 1.5
Root diameter (meter) -
Flower color
Blooming months -
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A tropical plant. It does best on well drained soils. It prefers an open sunny position. It is drought and frost tender. In Uganda they grow from 1,400-2,200 m altitude. In Ethiopia it grows between 900-2,400 m above sea level. It needs a temperature above 10°C. It grows in areas with a rainfall between 800-1,800 mm per year. It suits hardiness zones 10-12. In XTBG Yunnan.
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Evergreen submontane or medium altitude forest, usually near the margins, or in woodland often on rocky hills at elevations of 1,100-1,435 metres.
Light -
Soil humidity -
Soil texture 7-8
Soil acidity -
Soil nutriment -
Hardiness (USDA) 10-11

Usage

The leaves are chewed as a stimulant. They can also be made into a tea. They are dried for tea. Caution: There are cautions about the excessive chewing of leaves. It can cause impotence.
Uses environmental use fodder food material medicinal ornamental poison social use tea timber wood
Edible fruits leaves shoots
Therapeutic use Asthma (leaf), Astringents (leaf), Chest pain (leaf), Cough (leaf), General tonic for rejuvenation (leaf), Sympathomimetics (leaf), General tonic for rejuvenation (stem), Anorexia (unspecified), Asthma (unspecified), Astringent (unspecified), Chest (unspecified), CNS stimulant (unspecified), Cough (unspecified), Debility (unspecified), Fumitory (unspecified), Lethargy (unspecified), Masticatory (unspecified), Narcotic (unspecified), Poison (unspecified), Stimulant (unspecified), Tea (unspecified), Aphrodisiac (unspecified), Stomach (unspecified), Flu (unspecified), Central nervous system stimulants (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seed or by using cuttings. Suckers and root cuttings can be used. Seeds germinate within 2 weeks. (There are 60,000-80,000 seeds per kg.) Plants can be shaped or pruned.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) 18 - 24
Size -
Vigor -
Productivity -

Images

Habit

Catha edulis habit picture by Maarten Vanhove (cc-by-sa)

Leaf

Catha edulis leaf picture by Maarten Vanhove (cc-by-sa)

Distribution

Catha edulis world distribution map, present in Angola, Burundi, China, Eritrea, Ethiopia, Honduras, Kenya, Mozambique, Malawi, Rwanda, Saudi Arabia, Sudan, South Sudan, eSwatini, Tanzania, United Republic of, Uganda, Yemen, South Africa, Zambia, and Zimbabwe

Conservation status

Catha edulis threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:941530-1
WFO ID wfo-0000590815
COL ID RTRB
BDTFX ID -
INPN ID 632290
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Trigonotheca serrata Catha forskaolii Catha glauca Celastrus tsaad Dillonia abyssinica Hartogia thea Catha inermis Methyscophyllum glaucum Catha edulis Celastrus edulis