PTODE
Growth form
Broadleaf
Biological cycle
annual
Habitat
terrestrial
synonym | Baccharis pterocaulon Bojer ex DC. |
synonym | Conyza decurrens L. |
synonym | Conyza glomerata Wall. ex Link |
synonym | Gnaphalium decurrens L. |
synonym | Jeffreya decurrens (L.) Cabrera |
synonym | Monenteles pterocaulon DC. |
synonym | Pterocaulon bojeri Baker |
synonym | Pterocaulon decurrens (L.) S.Moore |
Malagasy |
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Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Both species are erect annual or biennial herbs, becoming woody at the base, with simple leaves, alternate, sessile, oblong, decurrent in large uninterrupted wings, more or less toothed margins. The following main characters distinguish them quite easily.
young plant | adult | Inflorescence | Distribution and harmfullness in Madagascar | |
Laggera crispata |
- entirely pubescent green; - oblong-elliptic leaf with apex subacute and attenuate base, light green uniform |
- stout plant with strong development, reaching more than 1 m high; - abundantly branched, leaves oblong - elliptic to lanceolate; - Finely toothed wings; - light green homogeneous. |
- flowers gathered in capitulum stalked +- tilted 10 to 15 mm in diameter and arranged in leafy panicles +- wide. - Flower heads surrounded by 4 or 5 rows of bracts. |
- generally scarce in annual crops. - Recorded especially on the Highlands and the Middle West above 800 m |
Neojeffreya decurrens |
- pubescent – grayish; - leaves oblong-subspatulate often marked by the presence of a gray-brown spots at the base of the blade and wings. |
- medium size plant, from 30 cm to 1 m high, - +- branched, - leaves oblong - spatulate; - Slightly ondulate wings; - Especially hairy-gray on the underside. |
- flowers gathered in very small elementary capitulum arranged in glomeruls (2nd order capitulum) dense subglobose 8 to 10 mm in diameter, sessile, arranged along the branches in leafy spikes +- loose. |
- localy abundant in crops and new fallows. - present everywhere in more or less all climatic zones of Madagascar. |
Attributions | |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Central Africa: Neojeffreya decurrens grows in open, ruderal areas and fallow fields.
Comoros: Present
Madagascar: Neojeffreya decurrens grows on ferruginous soils, ferralitic soils, alluvial soils with light texture of medium to low fertility, in sunny places. It is encountered on roadsides and around the edge of habitations. It is a weed of rainfed crops in cropping systems of cassava, maize and rainfed rice, extensive; in fallows and places found in almost all climatic zones of Madagascar (Middle west Highlands, Northwest).
Mauritius: Present.
Reunion: Absent.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Origin
Neojeffreya decurrens is native to Austral Africa.
Worldwide distribution
This species occurs in Southern Africa from Tanzania to South Africa and in the Indian Ocean (Madagascar, comoros and Mauritius).
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Local harmfulness
Comoros: Present but not a crop weed.
Madagascar: Neojeffreya decurrens is a common species with varying abundance. It is a weed of end cycle that often blooms after harvest annual of crops. It's a weed characteristic of rainfed crops on marginal lands and degraded pastures. It can be locally abundant in culture systems of cassava and upland rice in sub humid areas on light soils.
Mauritius: Present but not a crop weed.
Reunion: Absent.
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Attributions | Wiktrop |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Attributions | |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Herbarium pictures ReCOLNAT: https://explore.recolnat.org/search/botanique/simplequery=Neojeffreya%2520decurrens
Attributions | |
Contributors | |
Status | UNDER_CREATION |
Licenses | CC_BY |
References |
Root | Root |
Kingdom | Plantae |
Phylum | Tracheophyta |
Class | Magnoliopsida |
Order | Asterales |
Family | Asteraceae |
Genus | Neojeffreya |
Species | Neojeffreya decurrens (L.) Cabrera |