Cestrum parqui (Lam.) L'Hér.

First published in Stirp. Nov.: 73 (1788)
This species is accepted
The native range of this species is Bolivia to Brazil and S. South America. It is a shrub and grows primarily in the subtropical biome.


IUCN Red List of Threatened Species https://www.iucnredlist.org/species/82861249/192374652

LC - least concern

Flora Zambesiaca. Vol. 8, Part 4. Solanaceae. Gonçalves AE. 2005

Morphology General Habit
Shrub to 3 m, pubescent on younger branches.
Morphology Leaves
Leaves elliptic-lanceolate, soon glabrous or almost so.
Morphology Reproductive morphology Flowers
Flowers in terminal compound paniculiform inflorescences, with reduced bract-like leaves intercalated, fragrant at night.
Morphology Reproductive morphology Flowers Calyx
Calyx 5–6.5 mm long, tubular with short lobes; corolla tube greenish-yellow, 15–17 mm long, infundibuliform, narrow to a little above the calyx, then gradually widened; lobes triangular-lanceolate, hairy towards the edges; stamens inserted above widening of the corolla tube, basally swollen; ovary glabrous; style 16 mm long, pubescent at apex.
Morphology Reproductive morphology Fruits
Fruit violet-brown to black, 8–10 mm long, ovoid
Mozambique Native of the southern parts of South America, long cultivated in Europe and introduced to other parts of the Old World.

Solanaceae, Jennifer M Edmonds. Oliganthes, Melongena & Monodolichopus, Maria S. Vorontsova & Sandra Knapp. Flora of Tropical East Africa. 2012

Type: Chile, Concepcion, Dombey s.n. (locality of type not cited, ?P, holo. [NB if holo. not extant, Plate 36 of L’Heritier, Stirp. Nov. fasc., 4 (1788) should be designated as lecto.]
Morphology General Habit
Deciduous erect shrubs 1–3 m high.
Morphology Stem
Stems numerous and often suckering, green, terete, lenticellate, glabrescent with inconspicuous stalked glands throughout
Morphology Leaves
Leaves sometimes glossy, dark green, narrowly lanceolate, 8–11 × 2–3.7 cm, bases cuneate, often decurrent to stems, margins entire rarely sinuate, apices acute, both surfaces glabrescent but with stalked glands; stipules ovate to spatulate; petioles 5–9 mm long, glabrescent. Inflorescences congested terminal or lateral panicles; flowering stems shortly pilose/villous with simple, few-celled glandular and eglandular hairs; bracts narrowly lanceolate, ± 3 mm long, shortly pilose, some hairs glandular; pedicels 0.7–4 mm long
Morphology Reproductive morphology Flowers Calyx
Calyx cupulate/tubular, pale green, 4–5.5 mm long, pilose externally, lobes equal or unequal, triangular, 0.8–1 × 0.7–1.2 mm in flower, apex acute, enlarging to 2 × 2.5 mm in fruit, with denser pubescence and apical tufts of hairs
Morphology Reproductive morphology Flowers Corolla
Corolla yellow or yellowish-green, tubular to infundibuliform, (1.2–)1.8–2.2 cm long and 0.7–1.2 cm diameter apically; tube cylindrical or slightly bulbous above, (1.2–)1.4–1.8 cm long, diameter increasing to 3.5–4 mm below lobes, glabrescent externally, shortly pilose internally, with short, acute or obtuse triangular valvate lobes, usually spreading after anthesis when rounded and 2–5 × 1.5–3.5 mm, with densely pilose marginal bands externally
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens usually equal, with anthers and stigma visible in corolla throat; filaments free for 6–8 mm, curved apically, enlarged and pilose at adnation; anthers yellow to brown, 0.8–1.1 × 0.8–1 mm
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary green sometimes flecked purple, globose or broadly ovoid, 0.9–1.2 mm long, glabrous; disc pale green, cupulate, upper margins crenulate, 0.7–1.3 mm broad; style 14–16 mm long; stigma 1–1.2 mm broad
Morphology Reproductive morphology Fruits
Berry dark purple to blackish, ovoid, 7–8 × 6–7 mm, surrounded by cupulate calyx with adherent calyx lobes sometimes splitting to expose fruit
Morphology Reproductive morphology Seeds
Seeds ovoid, prismatic, dark brown, 3.5–4 mm long.
Sometimes occurring as an escape and recorded from open woodland with Crotalaria; 1850–3200 m
Widespread; least concern (LC)
Though this species is a widespread ornamental it is is well known for its toxicity (especially hepatic toxins) with common names including Green poison berry, Chilean- or green- Cestrum as well as Willow-leaved Jessamine. The flowers are reportedly slightly fragrant after dusk, and the leaves can be malodorous.
Flora districts: K4 Range: Native to Chile and Argentina, now a widespread ornamental

Common Names

Willow-leaved Jessamine


  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Living Collection Database

    • Common Names from Royal Botanic Gardens, Kew Living Collection https://www.kew.org/
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Neotropikey

    • Milliken, W., Klitgard, B. and Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.
    • http://creativecommons.org/licenses/by/3.0