img

Erigeron canadensis var. pusillus

(Nutt.) B.Boivin (1972)

This name is accepted

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

horseweed, ilioha, iliohe, lani wela

img

Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

img

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

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

Dispersal Agents


Pollinators

Specimens

img
img
img
img
img

Bibliography

Name Published In: Phytologia 23: 55 (1972)

Other References

Wagner et al. 1990:288 (Ni, K, O, Mo, L, M, H [as Conyza canadensis var. pusilla]); Wagner & Herbst 1995:16 (Mi); Starr et al. 2006:32 (Ka); Nesom 2008 (Syn. C. c. var. pusilla = E. c. var. pusillus); Heller 2820 BISH (K†, 1895)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Erigeron canadensis var. pusillus Along road to Hilina Pali Lookout Preserved_Specimen Nagata, K.M. 3539 Hawaii BISH 1986-06-21
2 Erigeron canadensis var. pusillus Slopes of Mauna Kea Preserved_Specimen Rock, J.F.C. 8337 Hawaii BISH 1910-06-01
3 Erigeron canadensis var. pusillus Kipuka Nene Preserved_Specimen Stone, B.C. 2985 Hawaii BISH 1959-06-26
4 Erigeron canadensis var. pusillus unknown Preserved_Specimen Hillebrand, W.B. BISH
5 Erigeron canadensis var. pusillus Haleakala Crater Preserved_Specimen Forbes, C.N. 1097 Maui BISH 1919-08-08
6 Erigeron canadensis var. pusillus Hawaii National Park; Uwekahuna Preserved_Specimen Fagerlund, G.O. 319 Hawaii BISH 1943-02-10
7 Erigeron canadensis var. pusillus East Maui, Wailuku District, growing along Hana Hwy., S side, W of Dairy Rd Preserved_Specimen Oppenheimer, H.L. 100055 Maui BISH 2000-10-30
8 Erigeron canadensis var. pusillus Slopes of Mauna Kea Preserved_Specimen Rock, J.F.C. 8337 Hawaii BISH 1910-06-01
9 Erigeron canadensis var. pusillus East Maui, Puu Ouli Preserved_Specimen Forbes, C.N. 2144 Maui BISH 1920-04-04
10 Erigeron canadensis var. pusillus East Maui, Haleakala slopes Preserved_Specimen Rock, J.F.C. 8559 Maui BISH 1910-09-01
11 Erigeron canadensis var. pusillus Diamond Head crater Preserved_Specimen Christophersen, E. 1466 Oahu BISH 1931-01-22
12 Erigeron canadensis var. pusillus 7 miles S of Kalae turnoff Preserved_Specimen Woolford, H.A. Hawaii BISH 1954-12-23
13 Erigeron canadensis var. pusillus S Half of Island Preserved_Specimen Stokes, J.F.G. Niihau BISH 1912-01-01
14 Erigeron canadensis var. pusillus Honolulu; Upper end of Manoa Valley Preserved_Specimen Caum, E.L. Oahu BISH 1945-07-28
15 Erigeron canadensis var. pusillus Mauna Kea; above Saddle Road, near Humuula Preserved_Specimen Christ, J.H. Hawaii BISH 1957-01-01
16 Erigeron canadensis var. pusillus [Hawaiian Islands; U.S.A.; Molokai; Hawaii; Maui Preserved_Specimen Russell, C.A. Molokai BISH 1987-10-22
17 Erigeron canadensis var. pusillus Honolulu; Manoa Valley Preserved_Specimen Caum, E.L. Oahu BISH 1945-07-25
18 Erigeron canadensis var. pusillus East Maui Haleakala National Park along road to Hosmers Grove Preserved_Specimen Welton, P. Maui BISH 2004-09-03
19 Erigeron canadensis var. pusillus Kilauea Volcano Preserved_Specimen Forbes, C.N. Hawaii BISH 1908-09-01
20 Erigeron canadensis var. pusillus Floor of Kilauea iki Preserved_Specimen Neal, M.C. Hawaii BISH 1929-08-03
21 Erigeron canadensis var. pusillus unknown Preserved_Specimen Mann, H. BISH 1864-01-01
22 Erigeron canadensis var. pusillus unknown Preserved_Specimen Hillebrand, W.B. BISH
23 Erigeron canadensis var. pusillus Miki Preserved_Specimen Munro, G.C. 510 Lanai BISH 1916-02-08
24 Erigeron canadensis var. pusillus Kaholuamanoa, above Waimea Preserved_Specimen Heller, A.A. 2820 Kauai BISH 1895-09-10
25 Erigeron canadensis var. pusillus Olinda In pasture Preserved_Specimen Young plants prostrate, caespitose. Mature plants to 3 ft. tall Hobdy, R.W. 1414 Maui BISH 1982-06-09
26 Erigeron canadensis var. pusillus Olinda In pasture Preserved_Specimen Hobdy, R.W. 1415 Maui BISH 1982-06-09
27 Erigeron canadensis var. pusillus South Kohala, Waimea, Range Paddock Common in dry region Preserved_Specimen Slender plant 1-2 ft. high Hosaka, E.Y. 2056 Hawaii BISH 1938-05-21
28 Erigeron canadensis var. pusillus Keauhou Ranch, Kau District, near Puu oo road Near road in `a`a lava. Preserved_Specimen Locally common. Flowers white and yellow. Davis, J. 194 Hawaii BISH 1980-01-08
29 Erigeron canadensis var. pusillus Drive down Hilina Pali Rd ca 4.9 miles to beginning of Footprints Trail (heading west towards Mauna Loa). Walk 3.5 miles down trail to ca. 50 meters west (below) the great fault pali Extremely sparse desert community on shifting ash dunes Preserved_Specimen Herb about 1 inch tall Newell, C.L. 749 Hawaii BISH 1966-09-02
30 Erigeron canadensis var. pusillus Keauhou Ranch, Kau District Growing in disturbed area of pastureland. Preserved_Specimen A few small plants. Flowers white with yellow centers. Davis, J. 312 Hawaii BISH 1980-08-06
31 Erigeron canadensis var. pusillus Kaunakakai Ahu Tr 2(23/24); Kaulolo; Ridge above north fork of Kaunakakai Gulch; Molokai FR Dry native shrub community with scattered mixed native trees Preserved_Specimen Herb Jacobi, J.D. 1429 Molokai BISH 1979-06-25
32 Erigeron canadensis var. pusillus Drive ca. 200 m down Hilani Pali Rd from intersection with Chain of Craters Rd. Plant ca. 20 m west (right side) of road. (Plot 1) Metrosideros-native shrub-Andropogon community Preserved_Specimen Herb about 6 inches tall. Newell, C.L. 412 Hawaii BISH 1966-08-15
33 Erigeron canadensis var. pusillus South Kohala, Waimea, Lalamilo Dry region, range paddock. Preserved_Specimen Rare, 1-2 ft. branching plant, flower white. Hosaka, E.Y. 2123 Hawaii BISH 1938-06-01
34 Erigeron canadensis var. pusillus Keauhou Ranch, Kau District, near Puu oo road Growing near road in `a`a lava. Preserved_Specimen Davis, J. 193 Hawaii BISH 1980-01-08
35 Erigeron canadensis var. pusillus Kahuku Training Area, landing zone Mesic, alien vegetation. Preserved_Specimen Erect herb. Morgan, L. 36 Oahu BISH 2006-03-16
36 Erigeron canadensis var. pusillus Hilina Pali Switchback Trail at end of Hilina Pali Road Very open Metrosideros-Diospyros forest Preserved_Specimen Herb about 6 inches tall Newell, C.L. 265 Hawaii BISH 1966-08-02
37 Erigeron canadensis var. pusillus Drive to end of Hilani Pali Rd and walk about 200 m west of rainshelter. Plant in grassland just W of pahoehoe lava flow , & N of large trailside Metrosideros tree. (Plot 2) Andropogon glomeratus grassland community on ash-covered pahoehoe lava Preserved_Specimen Herb about 2 ft. tall. Newell, C.L. 285 Hawaii BISH 1966-08-03
38 Erigeron canadensis var. pusillus Kahua Ranch On top of coarse, dry wind-swept place Preserved_Specimen Hosaka, E.Y. Hawaii BISH
39 Erigeron canadensis var. pusillus Olinda In pasture, along road Preserved_Specimen Juvenile rosettes prostrate, soon extending a single erect stem, usually branches near top at maturity 10 cm. to 1.2 m tall Hobdy, R.W. 1984 Maui BISH 1984-02-27
40 Erigeron canadensis var. pusillus East Maui, Hana District, Kahikinui AHU, Tr 25(10), S slope of Haleakala, N of Manawainui Gulch Dry native scrub with mixed grass community Preserved_Specimen Higashino, P.K. 9221 Maui BISH 1980-06-19
41 Erigeron canadensis var. pusillus Honokaa, Tex's Drive-Inn. Growing around parking lot. Preserved_Specimen Height up to 12 inches. Nagata, K.M. 4123 Hawaii BISH 1990-12-01
42 Erigeron canadensis var. pusillus Waimanalo Very localized on sand dunes Preserved_Specimen Degener, O. 18105 Oahu BISH 1928-02-24
43 Erigeron canadensis var. pusillus North Hilo District; Saddle Road (Highway 200) Just west of Humuula, at 24.5 miles SSE of junction with Hig Highway 190 Common along roadside in recent (1935) pahoehoe lave flows nearly devoid of vegetation Preserved_Specimen Erect annual herb, flowers white Lorence, D.H. 5512 Hawaii BISH 1987-08-07
44 Erigeron canadensis var. pusillus East Maui, Hana District, Kahikinui, Pahihi drainage basin Locally common in grassland heavily browsed by feral goats and occasional pig. Vegetation: Degraded Acacia/Metrosideros Montane Mesic Forest, w. Deschampsia, Holcus, Anthoxanthum, Axonopus, Pteridium, Conyza. Preserved_Specimen Oppenheimer, H.L. 90622 Maui BISH 2006-09-27
45 Erigeron canadensis var. pusillus Gulch N of Kaonohiokala Ridge growing in severly degraded area of dry shrubland and forest. Preserved_Specimen Small terrestrial herbs with white ray and yellow disc florets Oppenheimer, H.L. 40730 Lanai BISH 2007-04-25
46 Erigeron canadensis var. pusillus Hamakua District; Kaohe Ahu Tr 101(1); NW slope Mauna Kea, 1 km. NE of Puu Laau between Puu Nanaha, Parker Ranch Dry mixed grass-native shrub community with scattered Mamane trees Preserved_Specimen Higashino, P.K. 9514 Hawaii BISH 1981-01-21
47 Erigeron canadensis var. pusillus Ulupalakua, Makawao Open places in pasture Preserved_Specimen Hosaka, E.Y. 1694 Maui BISH 1937-01-20
48 Erigeron canadensis var. pusillus Mauna Kea; north of Pohakuloa On sheep-devastated slope Preserved_Specimen Degener, O. 20234 Hawaii BISH 1949-08-18
49 Erigeron canadensis var. pusillus Diamond Head Grassy bottom of crater Preserved_Specimen St.John, H. 10551 Oahu BISH 1930-05-10
50 Erigeron canadensis var. pusillus Kahului Industrial Area In vacant sandy lot Preserved_Specimen Flowers at anthesis 5 mm long, disc florets yellow, pappus tawny white 7-8 mm across; mature plant 4-5.5 ft tall Hobdy, R.W. 1402 Maui BISH 1982-05-24
51 Erigeron canadensis var. pusillus Le'ahi, along road leading into crater In garden bed, sunny, appearing unirrigated Preserved_Specimen Uncommon, only a few plants seen Faccenda, K. 2551 Oahu BISH 2022-07-30
52 Erigeron canadensis var. pusillus Schofield Barracks, South Range, along road to Pistol Range. Associated canopy: Schinus terebinthifolius, Spathodea campanulata, Falcataria moluccana, Neonotonia wightii. Understory: mowed grasses; Urochloa maxima, Eleusine indica, Conyza bonariensis, Plantago lanceolata. Roadsides heavily impacted by mowing and heavy traffic. Preserved_Specimen Rosette-forming aster, ca 40-45 cm tall (incl. inflorescence). Leaves narrow, yellow-green, ca 3 cm long, almost look like they are in fascicles. Flowers in bud, corolla white. Naturalized, 20+ plants seen; seedlings present. Beachy, J. 510 Oahu BISH 2019-02-12
53 Erigeron canadensis var. pusillus Mauna Kea (Puu Laau Road) In open Mamane-Naio forest. Preserved_Specimen Engilis Jr., A. 19 Hawaii BISH 1987-08-19
54 Erigeron canadensis var. pusillus Drive down Crater Rim Rd ca. 15 meters towards Volcano Observatory from the short strip of road connecting Crater R Rim Rd & Kona-Hilo Highway. Plant was ca. 40 m to right of Rd from 35 MPH sign Scattered Metrosideros-native shrub-lichen community on ash-covered pahoehoe lava. Preserved_Specimen Herb about 1 ft. tall Newell, C.L. 456 Hawaii BISH 1966-08-19
55 Erigeron canadensis var. pusillus Drive to end of Hilina Pali Rd & walk ca. 1.5 miles down Hilina Pali Switchback Trail. Plant near two large Metrosideros trees located ca. 10 meters from a sharp hairpin turn in trail just below small forest of trees. (Plot 46a) Very open Metrosideros-Diospyros forest on aa lava Preserved_Specimen Herb about 6 inches tall Newell, C.L. 429 Hawaii BISH 1966-08-18
56 Erigeron canadensis var. pusillus Drive to end of Hilani Pali Rd and walk about 200 m west of rainshelter. Plant in grassland just W of pahoehoe lava flow , & N of large trailside Metrosideros tree. (Plot 2) Andropogon glomeratus grassland community on ash-covered pahoehoe lava Preserved_Specimen Herb about 1 ft. tall. Newell, C.L. 284 Hawaii BISH 1966-08-03
57 Erigeron canadensis var. pusillus Lua Makika, Kahoolawe; west of rim in experimental planting area Vegetation: Eragrostis curvula, Pluchea spp., Leucaena leucocephala Preserved_Specimen Herb; dry scrub. Locally common Starr, F. 502082 Kahoolawe BISH 2005-02-08
58 Erigeron canadensis var. pusillus Schofield Barracks, McCarthy Flats, BAX. Growing along a training road, very little canopy nearby, Eucalyptus spp., Falcataria moluccana. Understory of Biens pilosa, various roadside grasses. Preserved_Specimen 30-50 plants naturalizing, seedlings present. Stems hairy. Leaves lanceolate; flowers small, white, aster-type. Beachy, J. 479 Oahu BISH 2018-01-25
59 Erigeron canadensis var. pusillus South Kohala; Waimea; Lalamilo range paddock Dry region. Preserved_Specimen Rare 1-2 foot branching plant; flowers white. Hosaka, E.Y. 2123 Hawaii BISH 1938-06-01
60 Erigeron canadensis var. pusillus Punaula Valley Bare eroded ridges Preserved_Specimen St.John, H. 12790 Molokai BISH 1932-12-28
61 Erigeron canadensis var. pusillus Drive ca. 200 m down Hilani Pali Rd from intersection with Chain of Craters Rd. Plant ca. 20 m west (right side) of road. (Plot 1) Metrosideros-native shrub-Andropogon community Preserved_Specimen Herb about 3 ft. tall Newell, C.L. 411 Hawaii BISH 1966-08-15
62 Erigeron canadensis var. pusillus Top of Nuuanu Pali Locally on earth slopes & ledges on exposed crest Preserved_Specimen Heads white Fosberg, F.R. 27084 Oahu BISH 1946-09-22
63 Erigeron canadensis var. pusillus Drive to end of Hilina Pali Rd & walk ca. 1.7 miles down Hilina Pali Switchback Trail to base of Pali where land levels out onto a plateau-like area. Plant was ca. 100 meters from base of Pali. (Plot 47) Eragrostis tenella grassland community Preserved_Specimen Herb about 6 inches tall Newell, C.L. 439 Hawaii BISH 1966-08-18
64 Erigeron canadensis var. pusillus upper S fork of Kaunakakai Gulch, W of Hanalilolilo, Forestry Road, 2nd culvert wet muddy roadside; Kyllinga, Carex, Persicaria, Lotus, Paspalum, Hedychium Preserved_Specimen to 1 m herb Oppenheimer, H.L. 90821 Molokai BISH 2008-09-26
65 Erigeron canadensis var. pusillus Jeep road below Puu Kolekole In mesic to arid scrub Preserved_Specimen Slender herb 8-25 cm. ht. Ray florets white, bifid Nagata, K.M. 2709 Molokai BISH 1983-07-29
66 Erigeron canadensis var. pusillus Kaaliwai In grassy vales Preserved_Specimen St.John, H. 23568 Niihau BISH 1949-03-29
67 Erigeron canadensis var. pusillus Drive down Chain of Craters Rd about 11.9 miles towards Kalapana from intersection with Crater Rim Rd; or ca. 1 mile before Naulu Picnic Area Rd. Plant was uphill from a paved pulloff Metrosideros-native shrub-Andropogon savanna community Preserved_Specimen Herb about 6 inches tall. Newell, C.L. 834 Hawaii BISH 1966-01-23
68 Erigeron canadensis var. pusillus East Maui, Olinda In pasture Preserved_Specimen Hobdy, R.W. 2084 Maui BISH 1984-05-08
69 Erigeron canadensis var. pusillus Drive ca. 200 m down Hilani Pali Rd from intersection with Chain of Craters Rd. Plant ca. 20 m west (right side) of road. (Plot 1) Metrosideros-native shrub-Andropogon community Preserved_Specimen Herb about 2 ft. tall. Newell, C.L. 413 Hawaii BISH 1966-08-15
70 Erigeron canadensis var. pusillus Drive ca. 200 m down Hilani Pali Rd from intersection with Chain of Craters Rd. Plant ca. 20 m west (right side) of road. (Plot 1) Metrosideros-native shrub-Andropogon community Preserved_Specimen Herb about 1.5 ft. tall. Newell, C.L. 414 Hawaii BISH 1966-08-15
71 Erigeron canadensis var. pusillus Road to Kipuka Puaulu, 1.5 miles west of Kilauea Military Camp In Styphelia & Dodonaea scrub on volcanic ash on gentle slope Preserved_Specimen Erect, green, with prominent rosette at base until anthesis, flowers white Fosberg, F.R. 33292 Hawaii BISH 1951-02-11
72 Erigeron canadensis var. pusillus Kamoku Preserved_Specimen Munro, G.C. 235 Lanai BISH 1913-11-15
73 Erigeron canadensis var. pusillus East Maui, Hana District, Haleakala National Park, Haleakala Crater, W Kaupo Gap Bare rocky ridge near Waikani. Preserved_Specimen Medeiros, A.C. 574 Maui BISH 1983-10-11
74 Erigeron canadensis var. pusillus West Kaupo Gap, Haleakala National Park, above exclosure Preserved_Specimen Gagné, B.H. 3058 Maui BISH 1991-04-29
75 Erigeron canadensis var. pusillus Kamoku Preserved_Specimen Munro, G.C. 279 Lanai BISH 1913-11-15
76 Erigeron canadensis var. pusillus Central Maui, Forestry Base yard Preserved_Specimen This weed is smaller than C. bonariensis, more blue-green in color with larger flowers, and white (pure) pappus that spreads out to form a globular head. This specimen is slightly smaller than normal. Plants 30-100 cm. tall. Hobdy, R.W. 1875 Maui BISH 1983-12-20
77 Erigeron canadensis var. pusillus Hawaii National Park; Kau Desert, Puu O Hale Preserved_Specimen Fagerlund, G.O. 71 Hawaii BISH 1942-10-22
78 Erigeron canadensis var. pusillus Miki Preserved_Specimen Munro, G.C. 530 Lanai BISH 1916-03-01
79 Erigeron canadensis var. pusillus Puna District; land of Olaa, Volcano transfer dump Preserved_Specimen Common herb with whitish flowers Herbst, D.R. 5539 Hawaii BISH 1975-10-23
80 Erigeron canadensis var. pusillus Jeep road below Puu Kolekole In road through remnant dryland sclerophyll scrub area Preserved_Specimen Wagner, W.L. 5448 Molokai BISH 1984-07-18
81 Erigeron canadensis var. pusillus Near Volcano House Preserved_Specimen Herb about 1.5 ft. tall. Newell, C.L. 140 Hawaii BISH 1966-07-22
82 Erigeron canadensis var. pusillus Coral plain below Ewa & Sisal (Barber's Point) Preserved_Specimen Forbes, C.N. 2337 Oahu BISH 1916-03-14
Back to Top