Clerodendrum johnstonii Oliv.

Species

Angiosperms > Lamiales > Lamiaceae > Clerodendrum

Characteristics

Variable in habit; shrub or small tree up to 3–4.5 m. with spreading branches or scrambling shrub 2.5–10.5 m.; older stems square and with stout spine-like curved persistent petiole-bases; younger densely ± adpressed velvety with fawn indumentum or with more orange or ferruginous to bright red-ferruginous ± shaggy hairs.. Leaves opposite or ternate (fide F.T.A. & K.T.S.), elliptic, ovate or oblong-ovate, 6.5–19.5 cm. long, 3.5–14.5 cm. wide, acuminate at the apex, broadly cuneate to cordate at the base, discolorous, sparsely pubescent above, pubescent to ± velvety brownish grey pubescent beneath, entire or obscurely crenate; petiole 1.5–10.5 cm. long, jointed above the base.. Inflorescences axillary and terminal, forming large complicated dense corymbose panicles of cymes 7–20 cm. wide, scented; peduncle 6–12 cm. long; pedicels 0–3 mm. long; main bracts linear-spathulate, 0.5–1 cm. long, densely fawn-velvety.. Calyx ovoid; tube 2 mm. long; lobes triangular, 1.5–2 mm. long.. Buds with round limb, pubescent outside.. Corolla white or yellowish white; tube (3.5–)9–10 mm. long, ± glabrous; lobes elliptic-oblong, 3.5–4 mm. long, 3–4 mm. wide, ciliate and pubescent outside.. Stamens exserted 6 mm.; anthers yellowish or blackish.. Style exserted 6 mm.. Fruit ovoid, 10 mm. long, 9 mm. wide, 4-lobed, sitting in a cup-like calyx.
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Leaves opposite or ternate, petiolate; lamina 3.3–19.5 × 3–14.5 cm, oblong-ovate, ovate or suborbicular, rounded and shortly cuspidate or acuminate at the apex, broadly cuneate to subtruncate or cordate at the base, entire or rarely irregularly crenate, discolorous, sparsely pubescent above with patent acicular hairs, ± pubescent-velutinous beneath with sessile spherical translucent to pale yellowish or reddish glands; petiole 0.8–10.5 cm long, articulate above the base, the basal part in stronger branches woody even before the fall of the leaf lamina.
Inflorescences axillary and terminal forming dense corymbose panicles of cymes 5–20 cm in diameter, sometimes with cymes also in the axils of the upper leaves; cymes many-flowered; peduncles of cymes somewhat thick, spreading or erect-spreading, the lower peduncles 4.5–6 cm (or more?) long; pedicels 0–3 mm long; bracts 5–10 mm long, linear-spathulate.
Stems with paired truncate projections or stout recurved hook-like persistent woody petiole bases; young shoots and branches densely tomentose-pubescent with soft crisped yellow-orange or ferruginous to bright red hairs, a similar indumentum also present on the petiole, inflorescences and calyces; older stems 4-angled, subglabrous.
Corolla white or creamy; tube 8–10 mm long, glabrous or nearly so; lobes 3–4 × 3–4 mm, elliptic-oblong, ciliate and pubescent outside with sessile spherical, reddish, sparse, minute glands on the outside.
Fruit 10–12 mm long and 9 mm wide, black, surrounded by the persistent, obtusely lobed, sitting in a cup-like calyx c. 12 mm in diameter.
An erect shrub 1.5–4.5 m high or a scrambling shrub with scandent stems up to 10.5 m long, or a tree up to 8 m tall.
Calyx campanulate, 3–4.5 mm long; lobes 1.5–2 mm long, triangular.
Style and stamens exserted for c. 8 mm.
Flowers sweet-scented.
Life form perennial
Growth form shrub
Growth support climber
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.5 - 4.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

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

Cultivation

Mode -
Germination duration (days) 21 - 60
Germination temperacture (C°) 21 - 23
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Flower

Clerodendrum johnstonii flower picture by Maarten Vanhove (cc-by-sa)

Distribution

Clerodendrum johnstonii world distribution map, present in Burkina Faso, Ethiopia, Kenya, Rwanda, Sudan, Somalia, Tanzania, United Republic of, Uganda, and Zambia

Conservation status

Clerodendrum johnstonii threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:862171-1
WFO ID wfo-0000882991
COL ID W3VL
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Clerodendrum johnstonii

Lower taxons

Clerodendrum johnstonii subsp. johnstonii Clerodendrum johnstonii subsp. marsabitense