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Chromolaena odorata

(L.) R.M.King & H.Rob. (1970)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Asterids Order: Asterales Family: Asteraceae Genus: Chromolaena

devil weed, siam weed

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Description

Key Characters:

Growth Form:

Stems:

Roots: Roots fibrous.

Leaves: Leaves simple. Opposite or rarely alternate. Blades deltate, lanceolate, or ovate, triangular Apex acute. Base decurent (extending down the petiole), obtuse, or truncate. Margins crenate, serrate/dentate, or rarely entire.

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Synonyms (42)

Chromolaena barranquillensis (Hieron.) R.M.King & H.Rob. (1970)
Chromolaena clematitis (DC.) Pruski (2009)
Chromolaena odorata f. squarrosa (Koster f.) Sunita Garg (1990)
Chrysocoma volubilis Vell. (1829)
Eupatorium atriplicifolium Vahl (1794)
Eupatorium barranquillense Hieron. (1901)
Eupatorium brachiatum Sw. ex Wikstr. (1827)
Eupatorium clematitis DC. (1836)
Eupatorium conyzoides Vahl (1794)
Eupatorium conyzoides f. angustiflorum Cuatrec. (1935)
Eupatorium conyzoides f. glabratum Hassl. (1916)
Eupatorium conyzoides var. extensum Hieron. (1897)
Eupatorium conyzoides var. floribundum (Kunth) Hieron. (1897)
Eupatorium conyzoides var. glabrescens Steetz (1854)
Eupatorium conyzoides var. heterolepis Griseb. (1861)
Eupatorium conyzoides var. incanum Baker (1876)
Eupatorium conyzoides var. maximiliani Baker (1876)
Eupatorium conyzoides var. pauciflorum Baker (1876)
Eupatorium conyzoides var. phyllocephalum Sch.Bip. ex Baker (1876)
Eupatorium conyzoides var. scaberulum Hassl. (1916)
Eupatorium conyzoides var. tambillense Hieron. (1905)
Eupatorium divergens Less. (1830)
Eupatorium floribundum Kunth (1818)
Eupatorium graciliflorum DC. (1836)
Eupatorium incisum A.Rich. (1792)
Eupatorium klattii Millsp. (1900)
Eupatorium odoratum L. (1759)
Eupatorium odoratum f. scandens Kuntze (1891)
Eupatorium odoratum f. squarrosum Koster f. (1952)
Eupatorium odoratum var. brachiatum (Sw. ex Wikstr.) DC. (1836)
Eupatorium odoratum var. cubense DC. (1836)
Eupatorium odoratum var. mallotophyllum B.L.Rob. (1926)
Eupatorium odoratum var. pauciflorum (Baker) Hieron. (1901)
Eupatorium sabeanum Buckley (1862)
Eupatorium stigmatosum Meyen & Walp. (1843)
Osmia atriplicifolia Sch.Bip. (1866)
Osmia clematitis (DC.) Sch.Bip. (1866)
Osmia conyzoides Small (1903)
Osmia divergens (Less.) Sch.Bip. (1866)
Osmia floribunda (Kunth) Sch.Bip. (1866)
Osmia graciliflora (DC.) Sch.Bip. (1866)
Osmia odorata (L.) Sch.Bip. (1866)

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized
Hawai'i Naturalized

Dispersal Agents

Wind
Other Animals

Vegetative Reproduction

Pollinators

Bibliography

Name Published In: Phytologia 20: 204 (1970)

Other References

Frohlich & Lau 2012:30 (NEWNAT/O, DESCR); Frohlich & Lau 2014:8 (O, RANGE EXT [spreading but localized across north and central O]); Parker et al. 2024:135 (H)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Chromolaena odorata South Hilo - Hilo Drag Strip Preserved_Specimen BIED 214 Hawaii BISH 2021-02-09
2 Chromolaena odorata Schofield Barrack East Range, lower section just S of Wahiawa neighboorhood. UTM 603197, 2376937. Open, dry to mesic disturbed military training area. Growing with Waltheria indica, Clidemia hirta, Andropogon virginicus, Dicranopteris linearis. Preserved_Specimen ~2 m tall vining shrub. Leaves with odor. Marsh, T. 355 Oahu BISH 2014-10-23
3 Chromolaena odorata Maku'u cliffs, Hawaiian Paradise Park, Puna District. Associates: Sphagneticola trilobata, Pandanus tectorius, Scaevola taccada, Casuarina Sp. Preserved_Specimen Naturalized. Semi-woody forbe to 8ft. Leaves with pitchfork venation. Terminal panicles, heavily fruiting, with many tufted seeds. Many plants naturalizing in this loation. Kaye, S. 214 Hawaii BISH 2021-05-26
4 Chromolaena odorata Kahuku Training Area off Bravo road, near Opana radar tracking station Dry to mesic lowland flattened ridge top, secondary forest growing among Schinus terebinthifolius. Preserved_Specimen Sprawling , climbing vine to 2.5 m hich in S. terebinthifolius thicket. Flowers white to pale lavendar. Achenes brown-grey, 3-4 ridged with pappus of equal length. Pali, H. 199 Oahu BISH 2011-01-11
5 Chromolaena odorata Lanikai, Kuailima beach access, closer to the beach end. Growing out of a naupaka bush. Sand substrate. Preserved_Specimen Single shrub with 2 branches, 4-5 ft tall. Youngest leaves with purple blush. Two reachable branches inside the naupaka shrub broken off before they could fruit/seed. Hawkins, J. 451 Oahu BISH 2016-09-10
6 Chromolaena odorata Schofield Barracks, in Lower Mohiakea gulch, along Area X and McCarthy Flat Access road. Fairly open Casuarina sp., Schefflera actinophylla, Spathodea campanulata, Melia azederach, Grevillea robusta, Acacia confusa canopy, Urochloa maxima dominated understory. Preserved_Specimen Shrub up to 1.5 meters tall, charactersitic arrowhead-shaped leaves with 3 veins from base. Flowers white, with faint lavender coloration. Fruits are achenes. Gustine-Lee, J. 312 Oahu BISH 2013-05-25
7 Chromolaena odorata Leilani Estates, Puna District Associates: Sphagneticola trilobata, Arthrostemma ciliatum. Melastoma candidum, Metrosideros polymorpha Preserved_Specimen Naturalized. Semi-woody forbe to 8ft. Leaves with pitchfork venation. Terminal panicles, heavily fruiting, with many tufted seeds. Many plants naturalizing in this loation. Kaye, S. 214 Hawaii BISH 2021-05-30
8 Chromolaena odorata Leilani Estates, Puna District. Associates: Sphagneticola trilobata, Arthrostemma ciliatum. Melastoma candidum, Metrosideros polymorpha Preserved_Specimen Naturalized. Semi-woody forbe to 8ft. Leaves with pitchfork venation. Terminal panicles, heavily fruiting, with many tufted seeds. Many plants naturalizing in this loation. Kaye, S. 214 Hawaii BISH 2021-05-30
9 Chromolaena odorata Off of ‘Aiea loop trail. Approximate UTM: 614244, 2366230. Dry to mesic secondary forest. Preserved_Specimen 2 ft tall shrub. Dube, N. 2015020501 Oahu BISH 2015-02-05
10 Chromolaena odorata Waianae Mts., Kaala Road, near culvert 16. Associated canopy: Eucalyptus spp., Psidium cattleyanum. Understory: Mesosphaerum pectinatum, Psidium cattleyanum. Preserved_Specimen Single naturalized shrub 1 m tall, immature. No seedlings seen. Tamayo, C. 501 Oahu BISH 2018-10-24
11 Chromolaena odorata Maku'u cliffs, Hawaiian Paradise Park, Puna District. Associates: Sphagneticola trilobata, Pandanus tectorius, Scaevola taccada, Casuarina Sp. Preserved_Specimen Naturalized. Semi-woody forbe to 8ft. Leaves with pitchfork venation. Terminal panicles, heavily fruiting, with many tufted seeds. Many plants naturalizing in this loation. Kaye, S. 214 Hawaii BISH 2021-05-26
12 Chromolaena odorata Waianae Mts., Makaha Valley. Non-native dry to mesic forest; 90% non-native (Schinus terebinthifolius, Psidium cattleianum, Syzygium cumini, Toona ciliata), 10% native (Diospyros sandwicensis, Metrosideros polymorpha, Psydrax odorata, Dodonaea viscosa). Preserved_Specimen Sterile, 7-12 inches tall. Roman, P. Oahu BISH 2018-10-16
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