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Ageratum conyzoides

L. (1753)

This name is accepted

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

ageratum, billygoat weed, maile hohono, maile honohono, nahelehele

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Description

Key Characters:

Growth Form:

Stems:

Roots: Root system includes adventitious roots and rooting at nodes.

Leaves: Leaves simple. Opposite. Blades elliptic, oblong, ovate, or rhombic Apex acute. Base cuneate (wedge-shaped), rounded, or truncate. Margins crenate.

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Ni'ihau(Incl. Lehua) Naturalized
Kaua'i Naturalized
O'ahu Naturalized
Molokai Naturalized
Lana'i Naturalized
Kaho'olawe Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents

Water/Ocean
Wind
Other Animals

Vegetative Reproduction

Pollinators

Bibliography

Name Published In: Sp. Pl.: 839 (1753)

Other References

Wagner et al. 1990:255 (Ni, K, O, Mo, L, M, Ka, H); Wood & LeGrande 2006:20 (Le)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Ageratum conyzoides Punaluu Valley Preserved_Specimen Rock, J.F.C. 896 Oahu BISH 1908-11-21
2 Ageratum conyzoides Molokini Islet; rare on inner slopes Preserved_Specimen Hobdy, R.W. 1234 Maui BISH 1982-02-14
3 Ageratum conyzoides Kilauea Crater Near bottom at east side Preserved_Specimen Fagerlund, G.O. 145 Hawaii BISH 1942-11-09
4 Ageratum conyzoides East Maui, Hana Preserved_Specimen Handy, E.S. 33.14 Maui BISH 1933-06-10
5 Ageratum conyzoides Mahana Preserved_Specimen Munro, G.C. 315 Lanai BISH 1913-10-01
6 Ageratum conyzoides Palolo-Waialae ridge Preserved_Specimen MacDaniels, L.H. 524 Oahu BISH 1927-01-27
7 Ageratum conyzoides Preserved_Specimen Rémy, J. 229 Oahu BISH 1851-01-01
8 Ageratum conyzoides Waimea Preserved_Specimen Seale, A. Kauai BISH 1900-04-29
9 Ageratum conyzoides Waipio Preserved_Specimen Swanson, R. Hawaii BISH 1931-07-09
10 Ageratum conyzoides Manana Island, off Waimanalo Higher elevations, scattered Preserved_Specimen Strandtmann, R.W. Oahu BISH 1979-06-12
11 Ageratum conyzoides base of Punchbowl Preserved_Specimen Heller, A.A. Oahu BISH 1895-03-25
12 Ageratum conyzoides Mt. Kaala Preserved_Specimen Christophersen, E. Oahu BISH 1925-12-11
13 Ageratum conyzoides [Hawaiian Islands; U.S.A.; Molokai; Hawaii; Maui Preserved_Specimen Stokes, J.F.G. Molokai BISH 1909-01-01
14 Ageratum conyzoides Rabbit Island Preserved_Specimen Neal, M.C. Oahu BISH 1930-03-16
15 Ageratum conyzoides Manana Island, off Waimanalo Preserved_Specimen Strandtmann, R.W. Oahu BISH 1979-06-12
16 Ageratum conyzoides Koolau Range, Makaha Valley Preserved_Specimen Forbes, C.N. Oahu BISH 1909-02-12
17 Ageratum conyzoides Mokulua islets, off Lanikai Preserved_Specimen Neal, M.C. Oahu BISH 1936-06-14
18 Ageratum conyzoides Pearl City; 1163 Hoolawa Pl Preserved_Specimen Tanaka, A. Oahu BISH 1986-08-12
19 Ageratum conyzoides Lanaihale Preserved_Specimen Kondo, Y. Lanai BISH 1961-03-26
20 Ageratum conyzoides Kaua, east side Preserved_Specimen UH student Oahu BISH 1958-04-26
21 Ageratum conyzoides [Hawaiian Islands; U.S.A.; O`ahu; Hawai`i; Honolulu] Preserved_Specimen Faurie, A. Oahu BISH 1909-04-01
22 Ageratum conyzoides Halemanu Preserved_Specimen Neal, M.C. Kauai BISH 1929-04-30
23 Ageratum conyzoides Honopu Beach Preserved_Specimen Corn, C. Kauai BISH 1984-07-19
24 Ageratum conyzoides Lower Kipahulu Valley, Area between upper pasture and the gauging station on Palakea Stream, for Resources Basic Inventory Preserved_Specimen Gagné, B.H. Maui BISH 1975-03-01
25 Ageratum conyzoides Kaali Preserved_Specimen Stokes, J.F.G. Niihau BISH 1912-01-01
26 Ageratum conyzoides East Maui, Hana Preserved_Specimen Neal, M.C. Maui BISH 1933-06-10
27 Ageratum conyzoides Honolulu Preserved_Specimen Pukui, M.K. Oahu BISH 1931-01-01
28 Ageratum conyzoides At base of footpath trail to Kaluiwaa (Sacred Falls), outside Forest Reserve Preserved_Specimen Corn, C. Oahu BISH 1978-03-21
29 Ageratum conyzoides Kaali Preserved_Specimen Stokes, J.F.G. Niihau BISH 1912-01-01
30 Ageratum conyzoides Manana Island, off Waimanalo Preserved_Specimen Strandtmann, R.W. Oahu BISH 1979-06-12
31 Ageratum conyzoides unknown Preserved_Specimen Mann, H. 373 BISH 1864-01-01
32 Ageratum conyzoides unknown Preserved_Specimen Wilder, G.P. BISH 1913-01-01
33 Ageratum conyzoides unknown Preserved_Specimen Rock, J.F.C. 2648 BISH
34 Ageratum conyzoides Honolulu District: Koko Head Scattered along jeep trail Preserved_Specimen Bruegmann, M.M. 178 Oahu BISH 1985-05-05
35 Ageratum conyzoides Ridges above Makaha Valley Preserved_Specimen MacDaniels, L.H. 593 Oahu BISH 1927-01-31
36 Ageratum conyzoides Miki Preserved_Specimen Munro, G.C. 294 Lanai BISH 1928-02-06
37 Ageratum conyzoides Former Naval Air Station Barbers Point, Northern Trap & Skeet Range Preserved_Specimen BISH staff 110 Oahu BISH 2021-04-30
38 Ageratum conyzoides Kualoa Ranch Preserved_Specimen Rock, J.F.C. 2660 Oahu BISH 1910-05-07
39 Ageratum conyzoides Ca. 400 m SW of intersection of roads to LZ-1 and LZ-3; on S side of road; area recently burned Preserved_Specimen Warren, S. 18 Kahoolawe BISH 1987-04-10
40 Ageratum conyzoides Waianae Mountains; Mokuleia, Puu Kaala Bottom of 2nd gulch east of Puu Kaupakuhale Preserved_Specimen Fosberg, F.R. 10709 Oahu BISH 1932-10-23
41 Ageratum conyzoides Lehua Rock Preserved_Specimen Caum, E.L. 14 Lehua Rock BISH 1931-04-18
42 Ageratum conyzoides Pauoa-Konahaunui Trail Preserved_Specimen Garber, D.W. 498 Oahu BISH 1920-07-11
43 Ageratum conyzoides Area between Lua Makika and Puu Moaula Preserved_Specimen Higashino, P.K. 8044 Kahoolawe BISH 1978-09-22
44 Ageratum conyzoides 0.25 mile from Waikoloa substation along powerline Preserved_Specimen Wagner, W.L. 4721 Hawaii BISH 1982-09-20
45 Ageratum conyzoides Coral Flats Preserved_Specimen Woolford, H.A. Oahu BISH 1957-02-24
46 Ageratum conyzoides unknown Preserved_Specimen BISH
47 Ageratum conyzoides Koko Head Common on all sunny sites Preserved_Specimen Egler, F.E. 37233 Oahu BISH 1937-02-02
48 Ageratum conyzoides Morgan Toledo Taro Farm, Waipio Valley, Big Island, Hawaii Growing at stream loi intake, on bank edge, back of property. Preserved_Specimen Upright, herbaceous, hairy stems. White pom-pom-like flowers in cymes. Crago, L.M. 2005095 Hawaii BISH 2005-03-19
49 Ageratum conyzoides Waimano Trail In rainforest Preserved_Specimen Erect herb 2 m tall. Flower purple-gray, fruit brown. Bryan Jr., E.H. 1520 Oahu BISH 1941-03-23
50 Ageratum conyzoides Mokolii On sheer rocks. Preserved_Specimen Starr, F. 504198 Oahu BISH 2005-04-19
51 Ageratum conyzoides Lehua Rock Weathered cinder cone with scattered to dense vegetation; Pluchea indica the dominant shrub with herb layer a mixture of native (Jacquemontia, Sicyos, Panicum, Waltheria) and alien species (Cenchrus spp., Gnaphalium, Ageratum, Sonchus) species. Preserved_Specimen Leaves medium green above, slightly paler below; stems maroonish-brown; flower heads lilac. Flynn, T.W. 4860 Lehua Rock BISH 1992-01-10
52 Ageratum conyzoides South Kohala District. Collected east of Queen Kaahumanu Highway between Mauna Lani Drive and Puako turn off Dry area with scant vegetation; open grassland with scattered Prosopis pallida. Preserved_Specimen Funk, E.J. 13 Hawaii BISH 1991-02-04
53 Ageratum conyzoides Piihonua. Site 01 OS Hilo Forest Reserve Stunted ohia wetland dieback. Soil extremely shallow and poorly drained organic found on a pahoehoe flow. Pirmary vegetation: Metrosideros polymorpha, Acacia koa, Ilex anomala, Coprosma spp., Gouldia sp., Myrsine sandwicensis & Pelea clusiifolia. Preserved_Specimen Adee, K.T. Hawaii BISH
54 Ageratum conyzoides Makiki Valley Open pastures, lower regions Preserved_Specimen Erect annual herb 2 ft high. Flowers blue, small Wilder, G.P. 65 Oahu BISH 1923-12-09
55 Ageratum conyzoides Kau District; Hawaii Volcanoes National Park Along Highway 11, across the road from foot prints trail In forest at edge of `a`a lava flow Preserved_Specimen Herb ca. 0.3 m high. Herat, T. 686 Hawaii BISH 1974-06-20
56 Ageratum conyzoides Laie 20 degree slope, clay-loam Preserved_Specimen Flowers blue Beckham, N. 63 Oahu BISH 1967-04-20
57 Ageratum conyzoides Kaalualu Bay near South Point In cracks in rocks and in grazed areas north of bay Preserved_Specimen Small herbs Whistler, W.A. 81 Hawaii BISH 1972-04-06
58 Ageratum conyzoides Kau District; Hawaii Volcanoes National Park Along Highway 11, across the road from foot prints trail In forest at edge of aa lava flow Preserved_Specimen Herb ca. 0.3 m high. Herat, T. 686 Hawaii BISH 1974-06-20
59 Ageratum conyzoides Koolaupoko S fork, Waiahole Valley Road Pure stand in abandoned agricultural field. Growing with Commelina diffusa, Bidens pilosa, etc. Preserved_Specimen Florets white. Nagata, K.M. 2393 Oahu BISH 1981-12-12
60 Ageratum conyzoides Lehua. Lithified ash substrate, small pockets of shallow, gravelly soil. Low growing, open vegetation dominated by non-native grasses and Pluchea indica. Preserved_Specimen Aster with purple pappus. Pubescent, dark gdreen lvs, mildly fragrant. Trauernicht, C. 442 Lehua Rock BISH 2008-03-24
61 Ageratum conyzoides Hilo District. From greenhouse sowing trays containing shipping container debris. Preserved_Specimen Pubescent herb ~10 cm. tall. Pappus pale purple/white. Tray C4. Yanger, C. Hawaii BISH 2021-01-04
62 Ageratum conyzoides Honolulu; U. H. Campus, Korean Studies Center Weed growing in a moist shady spot. Preserved_Specimen Lau, J. 1235 Oahu BISH 1985-07-22
63 Ageratum conyzoides Hamakua District Kahaupu Gulch at Field 17 of Honokaa Sugar Co Along and within canefield as a weed, scattered or in colonies. Preserved_Specimen To 2 ft. tall; small pale blue flowers Tomich, P.Q. 906 Hawaii BISH 1960-03-09
64 Ageratum conyzoides Ahihi-Kinau Natural Area Reserve, Ahihi Bay at the N end of the reserve Pockets of vegetation near the seashore amongst a'a lava about 200 years old. Preserved_Specimen Abbott, I.A. 91.17 Maui BISH 1991-03-05
65 Ageratum conyzoides near the US Forest Service Experimental tree planting site within Halepuaa Forest Reserve in the Puna District Quite common as a roadside weed and in disturbed areas. Preserved_Specimen Clarke, G. 79.2215 Hawaii BISH 1979-03-08
66 Ageratum conyzoides Lyon Arboretum, Middle Lawn Makai In lawn and cleared border around plants, between Cottage H and holding area Very common weed in areas where soil is disturbed. Shady to sunny. Preserved_Specimen Flowers blue Baker, R.F. 37 Oahu BISH 1974-12-30
67 Ageratum conyzoides Honolulu: Manoa Valley; University of Hawaii Manoa Campus, Korean Studies Center Weed growing in a moist shady spot. Preserved_Specimen Lau, J. 1235 Oahu BISH 1985-07-22
68 Ageratum conyzoides USA, Hawaiian Islands, Maui, west Maui, Lahaina District, between Kahauiki and Holoua Weed in grassy roadside Preserved_Specimen white flowers Oppenheimer, H.L. 122006 Maui BISH 2020-12-21
69 Ageratum conyzoides East Maui, Kipahulu Valley, Lower dogleg Mesic to wet koa forest with understory of Perrottetia sandwicensis, Psychotria hawaiiensis, Broussaisia arguta, Hedyotis acuminata. Preserved_Specimen Corolla lavender. Wagner, W.L. 5903 Maui BISH 1988-03-09
70 Ageratum conyzoides Highway between Laie & Kahuku Soil clayish Preserved_Specimen An erect branching perennial 4-6 ft. high. Leaves opposite, petioled, blade ovate, margins regularly toothed with blunt points. Lee, P. 3 Oahu BISH 1975-02-08
71 Ageratum conyzoides End of Hilina Pali Rd. and ca. 200 m west of rainshelter In Andropogon glomeratus grassland community on ash-covered pahoehoe lava & north of large trailside Metrosideros tree, (plot 2) Preserved_Specimen Shrub about 2 ft. tall. Leaves opposite Newell, C.L. 283 Hawaii BISH 1966-08-03
72 Ageratum conyzoides Kailua. Mokulua, north islet Rock ledges on steep slope Preserved_Specimen Fosberg, F.R. 12937 Oahu BISH 1936-02-16
73 Ageratum conyzoides End of Hilina Pali Rd. and ca. 1.5 miles down Hilina Pali Switchback Trail Very open Metrosideros-Diospyros forest on aa lava. Plant near 2 large Metrosideros trees ca. 10 m from a sharp hairpin turn in trail & just below a small forest of trees, (plot 46a) Preserved_Specimen Shrub about 3 inches tall Newell, C.L. 431 Hawaii BISH 1966-08-18
74 Ageratum conyzoides Laie, BYU-H hillside Soil clayish Preserved_Specimen Erect branching perennial 4-6 ft high. Leaves opposite, petioled, blade ovate, 2 to 3 inches long, margin regularly toothed with blunt points. Tiu, C. 25 Oahu BISH 1975-02-22
75 Ageratum conyzoides Pupukea Semi-rain forest. Red clay soil Preserved_Specimen Smith, M. 13 Oahu BISH 1986-01-21
76 Ageratum conyzoides Waiapaa Gulch, along road at edge of In open area. Preserved_Specimen Funk, E.J. 920015 Lanai BISH 1992-01-26
77 Ageratum conyzoides End of Hilina Pali Rd., on Hilina Pali Switchback Trail Very open Metrosideros-Diospyros forest Preserved_Specimen Shrub about 1.5 ft. tall Newell, C.L. 257 Hawaii BISH 1966-08-02
78 Ageratum conyzoides Lyon Arboretum, Middle Lawn Makai In lawn and cleared border around plants, between Cottage H and holding area Very common weed in areas where soil is disturbed. Shady to sunny. Preserved_Specimen Flowers blue Baker, R.F. 37 Oahu BISH 1974-12-30
79 Ageratum conyzoides Manana Island Open soil areas, central portion of crater Preserved_Specimen Long, C.R. 1695 Oahu BISH 1964-05-02
80 Ageratum conyzoides University of Hawaii, Manoa Campus Weed of shrubbery Preserved_Specimen Erect Br.herb 0.6 m high. Flower blue Swarbrick, J.T. 34 Oahu BISH 1976-01-04
81 Ageratum conyzoides Lihue District. Wailua Falls (pasture land) Preserved_Specimen Garcia, E.J. Kauai BISH 2018-08-22
82 Ageratum conyzoides Waianae Mountains, Waianaeuka East side of Puu Kaala Wet woods Preserved_Specimen No ray flowers. Flowers pinkish St.John, H. 10068 Oahu BISH 1929-11-24
83 Ageratum conyzoides East Maui, Hana District, Waihoi Valley, N side of valley In middle of small stream Preserved_Specimen Harrison, B. 166 Maui BISH 1972-07-26
84 Ageratum conyzoides Waianae Mountains; Makaleha Roadside weed Preserved_Specimen Height up to 0.6 m. Flower pale bluish-lilac. Bryan Jr., E.H. 691 Oahu BISH 1929-01-13
85 Ageratum conyzoides Kaa Preserved_Specimen Munro, G.C. 428 Lanai BISH 1929-04-15
86 Ageratum conyzoides Manana (Rabbit) Island Bottom of crater Preserved_Specimen Depauperate; herbage aromatic. Flowers lavender Fosberg, F.R. 12822 Oahu BISH 1936-01-18
87 Ageratum conyzoides Kalaupapa; Kauhako crater, SW zone Preserved_Specimen malodorous annual or short-lived perennial herb Wysong, M.L. 510 Molokai BISH 2004-12-07
88 Ageratum conyzoides Waianae Mountains; Mokuleia Forest Reserve Preserved_Specimen A weed Onouye, R. Oahu BISH 1934-02-04
89 Ageratum conyzoides East Maui, Pua o entabeni, HC 1 370 Hana Hwy, Haiku Preserved_Specimen Annual herb to 1.5m; flowers purple. Annable, C.R. 3157 Maui BISH 1996-11-23
90 Ageratum conyzoides End of Hilina Pali Rd. and ca. 1.7 miles down Hilina Pali Switchback Trail to base of Pali where land levels out onto a plateau-like area. Plant ca. 100 m from base of Pali, (plot 47) Preserved_Specimen Young shrub about 6 inches tall Newell, C.L. 440 Hawaii BISH 1966-08-18
91 Ageratum conyzoides Piihonua. Site 01 OS Hilo Forest Reserve Stunted ohia wetland dieback. Soil extremely shallow and poorly drained organic found on a pahoehoe flow. Pirmary vegetation: Metrosideros polymorpha, Acacia koa, Ilex anomala, Coprosma spp., Gouldia sp., Myrsine sandwicensis & Pelea clusiifolia. Preserved_Specimen Adee, K.T. Hawaii BISH 1979-06-20
92 Ageratum conyzoides Piihonua. Site 25 OS Hilo Forest Reserve Stunted ohia wetland dieback. Soil moderately deep, yet poorly drained organic found over a thin ash deposit on a pahoehoe flow. Primary vegetation: Metrosideros polymorpha, Acacia koa on well drained hummocks; Ilex anomala, Myrsine lessertiana. Preserved_Specimen Adee, K.T. Hawaii BISH 1979-07-03
93 Ageratum conyzoides Pauwela In abandoned pineapple field Preserved_Specimen Erect, branching, malodorous annual to ca. 3 ft. tall. Flowers lavender. Herbst, D.R. 808 Maui BISH 1967-12-20
94 Ageratum conyzoides Hilina Pali Escarpment, Hilina Pali Trail Steep, arid, grassy, badly disturbed, southeast-facing basalt cliffs & scree-slopes of volcanic ash & boulders, with rare trees of Metrosideros collina. Preserved_Specimen Iltis, H.H. 117 Hawaii BISH 1967-06-22
95 Ageratum conyzoides Diamond Head, S slopes Preserved_Specimen Munro, G.C. 41 Oahu BISH 1950-03-29
96 Ageratum conyzoides P.T.B.G., Lawai Valley Preserved_Specimen Herb with lavender florets. Herbst, D.R. 2256 Kauai BISH 1971-12-22
97 Ageratum conyzoides Diamond Head Grassy bottom of crater Preserved_Specimen St.John, H. 10550 Oahu BISH 1930-05-10
98 Ageratum conyzoides Mt. Kaala Preserved_Specimen Christophersen, E. Oahu BISH 1925-12-11
99 Ageratum conyzoides Highway 55. Just outside of Kilauea between Kilauea & Moloaa Preserved_Specimen Stems reddish-brown, heads white Flynn, T.W. 1329 Kauai BISH 1985-10-25
100 Ageratum conyzoides Manana (Rabbit) Island Bottom of crater Preserved_Specimen Depauperate; herbage aromatic. Flowers lavender Fosberg, F.R. 12822 Oahu BISH 1936-01-18
101 Ageratum conyzoides W Maui, Kahakuloa Preserved_Specimen Handy, E.S. 34.11 Maui BISH 1934-06-04
102 Ageratum conyzoides Palolo Valley Preserved_Specimen MacDaniels, L.H. 172 Oahu BISH 1927-01-01
103 Ageratum conyzoides Nuuanu Valley Roadside Preserved_Specimen Flowers pale purple. Gillespie, J.W. 1029 Oahu BISH 1927-07-01
104 Ageratum conyzoides Puhi Road. S of Puhi along cane field just past Pauli Stream Preserved_Specimen Large bushy plant 3 ft. high. Stems purplish, flower heads pale lilac. Flynn, T.W. 983 Kauai BISH 1985-01-10
105 Ageratum conyzoides Mahana Preserved_Specimen Munro, G.C. 175 Lanai BISH 1913-10-01
106 Ageratum conyzoides Nuuanu Valley Roadside Preserved_Specimen Flowers pale purple. Gillespie, J.W. 1029 Oahu BISH 1927-07-01
107 Ageratum conyzoides Princeville at Hanalei Roadside lookout onto Hanalei National Wildlife Refuge Preserved_Specimen Flowers yellowish white Wagner, W.L. 5170 Kauai BISH 1983-12-12
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