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Ambrosia confertiflora

DC. (1836)

This name is accepted

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

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Description

Key Characters:

Growth Form:

Stems:

Roots: Roots a tap root.

Leaves: Leaves simple. Alternate or rarely opposite. Blades deltate, elliptic, lanceolate, or ovate Apex acute or obtuse. Base attenuate, cuneate (wedge-shaped), or truncate. Margins bipinnatifid, deeply lobed or dissected, pinnately lobed.

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized
Molokai Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Prodr. 5: 526 (1836)

Other References

Faccenda, Arthur, et al. 2025:159 (NEWNAT/O, Mo, M, H, KEY)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Ambrosia confertiflora Kalamaula Along road to Forest Reserve Preserved_Specimen A strongly aromatic weed to 2.5 ft. tall Hobdy, R.W. 1386 Molokai BISH 1982-05-12
2 Ambrosia confertiflora North Kona, Kealakekua Growing along roadside Preserved_Specimen Plant 5 ft. tall Hosaka, E.Y. 1527 Hawaii BISH 1936-08-21
3 Ambrosia confertiflora Kipapa Gulch Weed along roadside Preserved_Specimen Hosaka, E.Y. 775 Oahu BISH 1932-09-25
4 Ambrosia confertiflora Schofield Road Roadside weed Preserved_Specimen Bryan Jr., E.H. Oahu BISH 1929-02-10
5 Ambrosia confertiflora Oahu Sugar Co Preserved_Specimen Lyon, H.L. Oahu BISH 1933-08-09
6 Ambrosia confertiflora Near Ewa Preserved_Specimen Forbes, C.N. 1915 Oahu BISH 1914-07-01
7 Ambrosia confertiflora Kauluwai Preserved_Specimen Munro, G.C. 587 Molokai BISH 1916-06-05
8 Ambrosia confertiflora Waialua District; Waianae Mountains Along secondary roads behind Waialua town Preserved_Specimen Upright, pungent shrub 0.5 m height. Florets yellow Nagata, K.M. 3251 Oahu BISH 1985-06-05
9 Ambrosia confertiflora North Kohala District Land of Kapaanui, along Highway 27 Preserved_Specimen Herb with gray-green foliage, yellow flowers. Herbst, D.R. 5617 Hawaii BISH 1976-01-19
10 Ambrosia confertiflora unknown Preserved_Specimen U.S. Exploring Expedition BISH
11 Ambrosia confertiflora unknown Preserved_Specimen BISH
12 Ambrosia confertiflora Coral plain below Ewa Mill & Sisal Preserved_Specimen Forbes, C.N. 2338 Oahu BISH 1916-03-14
13 Ambrosia confertiflora Kealia trail Preserved_Specimen Bennett, T. 250 Oahu BISH 1982-03-25
14 Ambrosia confertiflora Honolulu Preserved_Specimen Mann, H. 684 Oahu BISH 1864-01-01
15 Ambrosia confertiflora [Hawaiian Islands; U.S.A.; O`ahu; Hawai`i; Honolulu] Preserved_Specimen Higashino, P.K. 8183 Oahu BISH 1973-02-11
16 Ambrosia confertiflora Kauluwai Preserved_Specimen Munro, G.C. 375 Molokai BISH 1916-06-05
17 Ambrosia confertiflora Central Maui, Paukukalu near Halekii Heeiau State Park Preserved_Specimen Hobdy, R.W. 2566 Maui BISH 1986-06-17
18 Ambrosia confertiflora Honolulu Preserved_Specimen Mann, H. 684 Oahu BISH 1864-01-01
19 Ambrosia confertiflora Ca. 0.25 mile east of Wailua Beach Park Inland of strand & near old runway Preserved_Specimen Stemmermann, R.L. 3701 Oahu BISH 1979-02-11
20 Ambrosia confertiflora Preserved_Specimen Rémy, J. 246 Oahu BISH 1851-01-01
21 Ambrosia confertiflora Waialua Preserved_Specimen Faurie, A. 922 Oahu BISH 1909-11-01
22 Ambrosia confertiflora Ewa Preserved_Specimen Forbes, C.N. 1754 Oahu BISH 1912-02-16
23 Ambrosia confertiflora Oahu Sugar Co Preserved_Specimen Lyon, H.L. Oahu BISH 1933-08-09
24 Ambrosia confertiflora Nanakuli Beach Preserved_Specimen Kerr, M. Oahu BISH 1945-07-23
25 Ambrosia confertiflora Waimea Preserved_Specimen Degener, O. Oahu BISH 1949-10-31
26 Ambrosia confertiflora Waipio Preserved_Specimen Caum, E.L. Oahu BISH 1945-05-21
27 Ambrosia confertiflora Ka'ena point, Haleiwa side, about 500 m E of parking lot Dry, scrub dominated area Preserved_Specimen Uncommon along trail, only one local clump seen Faccenda, K. 2200 Oahu BISH 2022-01-16
28 Ambrosia confertiflora Kamuela-Kona roadside Naturalized almost exclusively along road. Preserved_Specimen Degener, O. 20056 Hawaii BISH 1949-08-27
29 Ambrosia confertiflora Kunia District Weed in pineapple fields Preserved_Specimen Leaves appearing green. St.John, H. 20441 Oahu BISH 1944-01-04
30 Ambrosia confertiflora Waialua, Haleiwa Point On thin coral sand in full sun. Preserved_Specimen Aromatic herb up to 1 m tall, larger plants in sheltered places Fosberg, F.R. 27129 Oahu BISH 1946-10-20
31 Ambrosia confertiflora Waipio, Kipapa Gulch Weed in cane field Preserved_Specimen Hosaka, E.Y. 1277 Oahu BISH 1935-02-24
32 Ambrosia confertiflora Waianae Mountains Along gulch at mouth of Ekahanui Gulch Weed of pineapple field Preserved_Specimen Erect, aromatic herb. Flowers yellow; foliage gray-green Herbst, D.R. 5271 Oahu BISH 1975-04-08
33 Ambrosia confertiflora Kunia District Weed in pineapple fields Preserved_Specimen Upper leaves green, lower leaves whitish St.John, H. 20442 Oahu BISH 1944-01-04
34 Ambrosia confertiflora W Maui, Wailuku District, Paukukalo County Park In meter area next to parking lot. Preserved_Specimen Erect herb 1 dm ht; foliage w. strong scent. Starr, F. 102221 Maui BISH 2001-02-22
35 Ambrosia confertiflora Honolulu; University Avenue and King Street Wayside plant Preserved_Specimen Egler, F.E. 37229 Oahu BISH 1937-04-26
36 Ambrosia confertiflora Ualapue Along dry road in single 50' x 3' area Preserved_Specimen Degener, O. 5594 Molokai BISH 1928-07-13
37 Ambrosia confertiflora Kunia District Weed in pineapple fields Preserved_Specimen Foliage dull green. St.John, H. 20440 Oahu BISH 1944-01-04
38 Ambrosia confertiflora Kealakekua Naturalized along small strech of road. Preserved_Specimen Degener, O. 2127 Hawaii BISH 1926-08-23
39 Ambrosia confertiflora Along Waimea Bay Sandy shore Preserved_Specimen Shrub. Shinohara, B. 82 Oahu BISH 1946-12-01
40 Ambrosia confertiflora Dillingham Airfield Conspicuous roadside weed on paved roads Preserved_Specimen Takeuchi, W.N. 66 Oahu BISH 1984-02-10
41 Ambrosia confertiflora Kawailoa Common on roadside Preserved_Specimen Erect herb; 40 cm. Flower yellow-green Swarbrick, J.T. 0.57 Oahu BISH 1976-01-07
42 Ambrosia confertiflora Haleiwa arid coastal plain Preserved_Specimen Degener, O. 2066 Oahu BISH 1923-05-31
43 Ambrosia confertiflora North Kohala, Pua Kea Ranch Roadside Preserved_Specimen Flowers yellow Ewart III, G.R. 249 Hawaii BISH 1932-05-16
44 Ambrosia confertiflora Mokuleia Beach Naturalized in pasture. Preserved_Specimen Degener, O. 33345 Oahu BISH 1977-04-29
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