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Synonyms: |
Stramonium ferox Boccone |
Common names: | Large thorn apple (English) |
Frequency: | |
Status: | Introduced |
Description: |
Erect, sometimes dichotomously branched annual herb, 30-120 cm. Leaves alternate, unpleasantly scented when crushed, ovate to rhombic-ovate, up to 16 × 12 cm, thinly textured, almost hairless to pubescent, particularly near the base; base often decurrent into the petiole; margin with almost lobe-sized triangular teeth. Flowers solitary in the forks of the branches or axillary. Calyx long and tube-like, up to 3.5 cm long, 5-angled with ovate to triangular-lanceolate unequal apical lobes, 2.5-7 mm long. Corolla white to pale yellowish, rarely pale blue, 4-7 cm long, slightly 5-lobed with narrow acuminate tips. Fruit erect, ovoid-ellipsoid, up to 8 × 6 cm (including spines), covered in robust unequal, narrowly conical spines, up to 2.5 cm long, purple-green to brownish when ripe, regularly dehiscent. All parts of the plant are poisonous. |
Notes: | |
Derivation of specific name: | ferox: very prickly, ferocious (perhaps referring to the large spines on the fruit) |
Habitat: | |
Flowering time: | Oct - Mar |
Worldwide distribution: | Native to southern North America. Now an almost cosmopolitan weed. |
Botswana distribution: | SW,SE |
Growth form(s): | |
Endemic status: | |
Red data list status: | |
Insects associated with this species: | |
Spot characters: | Display spot characters for this species |
Literature: |
Chapano, C. & Mugarisanwa, N.H. (2003). Plants of the Matobo District National Herbarium and Botanic Garden, Zimbabwe Page 13. Gonçalves, A.E. (2005). Solanaceae Flora Zambesiaca 8(4) Pages 31 - 32. (Includes a picture). Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 79. Maroyi, A. (2006). Preliminary checklist of introduced and naturalized plants in Zimbabwe. Kirkia 18(2) Page 243. Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 105. |
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