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Ageratina riparia

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

This name is accepted

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

hāmākua pāmakani [hamakua pamakani], spreading mist flower

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Description

Key Characters:

Growth Form:

Stems:

Roots: Roots fibrous.

Leaves: Leaves simple. Opposite. Blades elliptic or lanceolate Apex acute. Base acute or attenuate. Margins serrate/dentate.

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Naturalized
O'ahu Naturalized
Molokai Naturalized
Lana'i Naturalized
Kaho'olawe Potentially Naturalizing
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents


Pollinators

Specimens

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Bibliography

Name Published In: Phytologia 19: 216 (1970)

Other References

Wagner et al. 1990:255 (O, Mo, M, H); Herbst & Wagner 1996:9 (K); Oppenheimer & Bartlett 2002:3 (L); Warren et al. 1994:12 (Ka? [observed but no spm.])

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Ageratina riparia Lower Kipahulu Valley, Area between upper pasture & the gauging station on Palakea Stream Preserved_Specimen Gagné, B.H. Maui BISH 1975-03-01
2 Ageratina riparia Hilo-Kona Rd Preserved_Specimen Meebold, A. Hawaii BISH 1932-05-01
3 Ageratina riparia 29 mi near Kilauea Volcano Preserved_Specimen Bryan, L.W. Hawaii BISH 1939-03-09
4 Ageratina riparia Honolulu, Tantalus Rd Preserved_Specimen Swezey, O.H. Oahu BISH 1945-02-21
5 Ageratina riparia Wailupe Preserved_Specimen Kondo, Y. Oahu BISH 1951-06-23
6 Ageratina riparia Drive down Hilina Pali Rd about 4.9 mi to beginning of Footprints Trail (heading W towards Mauna Loa). Walk 3.5 mi down this trail to about 50 m W (below) the great fault pali. Plot 59 In area with old pahoehoe lava covered with shifting black ash. Extremely sparse desert community on shifting ash dunes Preserved_Specimen 6 in tall herb Newell, C.L. 750 Hawaii BISH 1966-09-02
7 Ageratina riparia Hilo; Mountain View, Olaa Along roadside Preserved_Specimen Very common, not seen in 1926 Degener, O. 3892 Hawaii BISH 1930-04-10
8 Ageratina riparia Hamakua District, Honokaa Sugar co Scattered at roadsides & weedy places. Dense to exclusion of most other plants on roadside cuts Preserved_Specimen 12-24 in tall, flowers white, stems reddish, spreading Tomich, P.Q. 912 Hawaii BISH 1960-03-18
9 Ageratina riparia Palikea Trail N facing slope On steep short slope Preserved_Specimen Weed, abundant, introduced (Not on sheet) 6 Oahu BISH 1963-10-12
10 Ageratina riparia N side of Saddle Rd 11 mi from Hilo Growing along disturbed roadside in shade of Acacia koa tree Preserved_Specimen Subshrub about 4 ft tall, slender stems becoming woody at base. Young stems, petioles, & veins purple. Flowers white. Herbst, D.R. 891 Hawaii BISH 1968-02-06
11 Ageratina riparia ahupuaa of Halepuaa in the Puna District, on the 1840 lava flow The plant was growing in an exposed area on the 1840 lava flow. The soil is `a`a. The dominant vegetation is Ohia, Uluhe, and Sword fern. The plant was growing on the side of a crevice and appeared to be localized only to this area. Preserved_Specimen Yoshida, L. 79.095 Hawaii BISH 1979-04-03
12 Ageratina riparia Honolulu, Manoa Valley Manoa Cliff Trail, slopes of Mt Tantalus On steep slopes in woods Preserved_Specimen Low, slender, densely branched shrub, heads pinkish white. Abundant Fosberg, F.R. 29478 Oahu BISH 1948-02-01
13 Ageratina riparia Head of Punaluu Valley Just N of head of Poamoho Trail Along trail on wet, windswept crest with low scrubby vegetation Preserved_Specimen Weak shrub; flowers white Fosberg, F.R. 41450 Oahu BISH 1961-03-09
14 Ageratina riparia Hilo; Mountain View, Olaa Along roadside Preserved_Specimen Very common, not seen in 1926 Degener, O. 3892 Hawaii BISH 1930-04-10
15 Ageratina riparia Kahana Valley Clay loam & grass with 10% slope Preserved_Specimen Weed Elia, H.V.K. 15 Oahu BISH 1971-02-20
16 Ageratina riparia N side of Saddle Rd 11 mi from Hilo Growing along disturbed roadside in shade of Acacia koa tree Preserved_Specimen Subshrub about 4 ft tall, slender stems becoming woody at base. Young stems, petioles, & veins purple. Flowers white. Herbst, D.R. 891 Hawaii BISH 1968-02-06
17 Ageratina riparia Hawaii National Park Makaopuhi Wall In wet forest Preserved_Specimen White flowering heads, reddish-brown twigs Fagerlund, G.O. 581 Hawaii BISH 1943-05-24
18 Ageratina riparia Kau District. Off the beginning part of Halape Trail in the goat enclosure In crevice Preserved_Specimen Herat, T. 819 Hawaii BISH 1974-06-29
19 Ageratina riparia Hamakua District, Kukuihaele quad, Waipio Valley, Wailoa Stream, in vicinity of furthest upstream kalo auwai Occasional small shrub growing atop a small boulder in middle of stream, along with Pilea microphylla. Surrounding disturbed forest dominated by Psidium guajava and Diplazium esculentum. Preserved_Specimen Imada, C. 20011 Hawaii BISH 2001-03-13
20 Ageratina riparia ahupuaa of Halepuaa in the Puna District The plant was growing in an exposed area on the 1840 lava flow. The soil is `a`a. The dominant vegetation is Ohia, Uluhe, and Sword fern. The plant was growing on the side of a crevice and appeared to be localized only to this area. Preserved_Specimen Yoshida, L. 79.095 Hawaii BISH 1979-04-03
21 Ageratina riparia Waianae Range; Makua Keaau Forest Reserve Mesic forest Preserved_Specimen Perennial herb Annable, C.R. 3075 Oahu BISH 1996-10-24
22 Ageratina riparia Kipapa Trail, 0.75 mi from boundary, off-trail, ridgeline N and perpendicular to trail disturbed wet lowland forest; Metrosideros, Acacia, Dicranopteris Preserved_Specimen herb Reynolds, L.S. 200 Oahu BISH 2006-07-06
23 Ageratina riparia Puuwaawaaahulu Valley Dirt bank in grazed rangeland Preserved_Specimen Subshrub Takeuchi, W.N. 5749 Hawaii BISH 1989-05-01
24 Ageratina riparia Honolulu, Lyon Arboretum Section 36, from bend in rd near electric pole #8 Sunny, often wet Preserved_Specimen Low sprawling shrub, flowers white Baker, R.F. 58 Oahu BISH 1975-04-09
25 Ageratina riparia Back of Honolulu, Manoa cliffs trail, slopes of Mt. Tantalus above Manoa Valley On steep slopes in thin woods. Preserved_Specimen Low slender, densely branched shrub; heads pinkish white. Fosberg, F.R. 29478 Oahu BISH 1948-02-01
26 Ageratina riparia Waianae Mts, Kamaileunu Ridge A SW ridge separating Waianae Kai & Makaha Valleys In rock outcrop Preserved_Specimen Flowers white Wagner, W.L. 5090 Oahu BISH 1983-12-11
27 Ageratina riparia N side of Saddle Rd 11 mi from Hilo Growing along disturbed roadside in shade of Acacia koa tree Preserved_Specimen Subshrub about 4 ft tall, slender stems becoming woody at base. Young stems, petioles, & veins purple. Flowers white. Herbst, D.R. 891 Hawaii BISH 1968-02-06
28 Ageratina riparia Tantalus Drive Moist forest roadside Preserved_Specimen Flowrs white, Brown woody herb, 0.5 m tall. Abundant. Swarbrick, J.T. 0.76 Oahu BISH 1976-01-10
29 Ageratina riparia Puuwaawaaahulu Valley Dirt bank in grazed rangeland Preserved_Specimen Subshrub Takeuchi, W.N. 5749 Hawaii BISH 1989-05-01
30 Ageratina riparia Along the SE rim of Puhimau crater Preserved_Specimen Herat, T. 1042 Hawaii BISH 1974-07-15
31 Ageratina riparia Keauhou Ranch, Kau District, along Puu oo road On `a`a ridge in pasture of Pennisetum with scattered Metrosideros. Preserved_Specimen Trailside weed. Height 1 1/2 ft. Flowers white. Cuddihy, L.W. 139 Hawaii BISH 1980-01-23
32 Ageratina riparia Aiea, Aiea Loop Trail On trail sides Preserved_Specimen Weed; very common Mäkinen, L. 66259 Oahu BISH 1966-01-30
33 Ageratina riparia Waianae Mts, Peacock Flats Growing in shade, along embankment of rd in dry forest Preserved_Specimen Shrub to 1.5 m tall. Stems reddish, hirsute. Leaves opposite, lanceloate, prominantly three veined, serrate margins. Flowering heads white Spence, G. 207 Oahu BISH 1973-09-06
34 Ageratina riparia Boundary of Luhue & Kawaihau Districts; headwaters of N fork of Wailua River Primary undisturbed vegetation of scattered trees & shrubs 1-1.5 m tall over saturated rocky soil dominated by Metrosideros, Diplazium, Cyrtandra spp. & Perrottetia. Preserved_Specimen Sprawling herb, freely rooting at nodes; stems reddish-brown, leaves dull medium green with glossy veins, corollas whitish. Flynn, T.W. 5279 Kauai BISH 1993-03-11
35 Ageratina riparia Waianae Mts, Palikea, Ewa Growing with Bidens along trail with Dubautia, Metrosideros, & Coprosma association Preserved_Specimen Low, spreading, compact shrub. Inflorescence often long, lax Nagata, K.M. 1517 Oahu BISH 1978-01-17
36 Ageratina riparia Piihonua Stunted ohia wetland dieback, soil is extremely shallow & poorly drained organic found on a Pahoehoe flow. Primary vegetation: Metrosideros polymorpha, Acacia koa, Ilex anomala, Coprosma spp, Gouldia sp., Myrsine sandwicensis & Pelea clusiifolia Preserved_Specimen Adee, K.T. Hawaii BISH
37 Ageratina riparia Keauhou Ranch, Kau district, along Puu oo road Common trailside weed, on `a`a ridge in pasture of Pennisetum with scattered Metrosideros. Preserved_Specimen Height: 1 1/2 ft. Flowers white. Cuddihy, L.W. 139 Hawaii BISH 1980-01-23
38 Ageratina riparia Upper Nuuanu Valley On low cut banks on roadside At edge of dense wet forest mainly of exotic trees Preserved_Specimen Sprawling plants, lower parts of stems prostrate, stolon-like, abundantly rooting, heads discoid, white; Abundant. Fosberg, F.R. 56683 Maui BISH 1977-03-06
39 Ageratina riparia Hanalei District, Kalalau Valley along rim between the Kalalau and Puu O Kila lookouts Metrosideros dominated wet forest with Cheirodendron, Perrottetia, Sadleria, Diplazium, Coprosma, and Nertera. In small drainage. Preserved_Specimen Sprawling herb; leaves dull medium green, flowers erect, whitish. Flynn, T.W. 5978 Kauai BISH 1996-04-04
40 Ageratina riparia W Maui, Waihee Trailside In ohia-uluhe zone Preserved_Specimen Weed Takeuchi, W.N. 7529 Maui BISH 1992-03-24
41 Ageratina riparia Honolulu, Lyon Arboretum Section 38, from bend in rd near electric pole #8 Sunny, often wet Preserved_Specimen Sickled periodically, flowers white, low sprawling shrub Baker, R.F. 58 Oahu BISH 1975-04-09
42 Ageratina riparia Mt. Tantalus On forest trail Preserved_Specimen Disk florets only, white, suffruticose Stone, B.C. 3215 Oahu BISH 1960-02-11
43 Ageratina riparia East Maui, Kipahulu Valley, Midcamp Bog Preserved_Specimen Corollas white Wagner, W.L. 5885 Maui BISH 1988-03-09
44 Ageratina riparia Tantalus Trail Towards divide Preserved_Specimen White Kerr, M. 26 Oahu BISH 1945-09-02
45 Ageratina riparia Upper Waiakea Forest Reserve Along disappointment Trail (Puu Makaala access rd.) off of Kulani Rd (Stainback Hwy) Preserved_Specimen Wagner, W.L. 5249 Hawaii BISH 1984-02-28
46 Ageratina riparia East Maui, Kipahulu Valley, Midcamp Bog Preserved_Specimen Corollas white Wagner, W.L. 5885 Maui BISH 1988-03-09
47 Ageratina riparia Keauhou Ranch, Kau district. Along Kilauea Forest Reserve boundary fence Growing with kikuyu grass. Herb, 2 ft. tall, flowers white. Preserved_Specimen Cuddihy, L.W. 65 Hawaii BISH 1979-12-18
48 Ageratina riparia Kalaupapa; trail, between switchback 6 and 8 Preserved_Specimen spreading subshrub Wysong, M.L. 622 Molokai BISH 2005-02-12
49 Ageratina riparia Lanaihale, N side Near picnic table. Preserved_Specimen Oppenheimer, H.L. 109924 Lanai BISH 1999-10-25
50 Ageratina riparia Along trail to Sacred Falls, Kaluanui Valley Preserved_Specimen Weed. Corn, C. Oahu BISH 1978-03-21
51 Ageratina riparia East Maui, Waihoi Valley, N side of valley, along stream Preserved_Specimen Harrison, B. 2622 Maui BISH 1972-07-23
52 Ageratina riparia Manoa Cliff Trail Preserved_Specimen Flowers a light purple Webster, G.L. 1219 Oahu BISH 1948-02-02
53 Ageratina riparia Hawaii National Park Hilo entrance, along roadside Preserved_Specimen 2 ft tall, woody Fagerlund, G.O. 405 Hawaii BISH 1943-02-24
54 Ageratina riparia Waianae Mts, Mokuleia Forest Reserve Preserved_Specimen Krauss, N.L.H. 956 Oahu BISH 1964-03-09
55 Ageratina riparia Koolau Range, Wailae Iki, Waimanalo Summit Preserved_Specimen Woolford, H.A. 365 Oahu BISH
56 Ageratina riparia Waianae Mts W of Kunia, along the contour trail, SW of Maunauna Preserved_Specimen Bryan Jr., E.H. Oahu BISH 1967-07-04
57 Ageratina riparia Kaua, Pamakani, E side Preserved_Specimen Student at University of Hawaii Maui BISH 1958-04-26
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