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Acacia mearnsii

De Wild. (1925)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Fabales Family: Fabaceae Genus: Acacia

black wattle

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Description

Key Characters:

Growth Form: Trees (shrubby when young) up to 50 m tall.

Stems: Branches densely minutely gray pubescent.

Roots:

Leaves: Leaves compound (bipinnate). Alternate. Blades with 8–21 pairs of pinnae, leaflets 20–33 pairs in the lower pinnae, up to 40 pairs in the uppermost pinnae. Leaflets linear–oblong. 1.5–4 mm long, 0.5–0.8 mm wide, with a nectary on the main rachis between or near each pair of pinnae. Petiolate.

Flowers: Flowers bracteoles absent, flowers ca. 1.8 mm long, in heads ca. 5 mm in diameter (excl. stamens), these arranged in terminal leafy panicles not exceeding the subtending leaves. Flowers mimosaceous. Calyx campanulate. Corolla dark yellow. Stamens numerous, ca. 3 mm long. Ovary superior.

Fruit: Pods oblong; somewhat moniliform; laterally flattened; constricted between all of the seeds; 7.5–10 cm long; 0.6–0.8 cm wide; sutures gray; pubescent. Seeds ellipsoid; laterally flattened; 4–7 mm long; 3–6 mm in diameter.

Ploidy: 2n = 26

Habitat: Pastures and dry to mesic forest.

Elevation Range: 245–1,220 m.

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 Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents

Water/Ocean
Forestry

Pollinators

Notes

  • Description digitized by Tiffany Flood
  • Description digitized from the Manual of the Flowering Plants of Hawaii

Bibliography

Name Published In: Pl. Bequaert. 3: 61 (1925)

Other References

Wagner et al. 1990:642 (K, O, L, M, H); Hughes 1995:5 (Mo); Starr et al. 2006:35 (Ka)

Occurrences

SNo. Scientific Name Scientific Name Authorship Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Acacia mearnsii De Wild. waimea, road to alakai swamp PRESERVED_SPECIMEN chock, a.k. collector number: 401 Kauai BISH 2/6/1952
2 Acacia mearnsii De Wild. East Maui, Haleakala PRESERVED_SPECIMEN Andrews, Mrs. s.n. Maui BISH 2/14/1968
3 Acacia mearnsii De Wild. Kapalama Valley, Koolau Range dry upper forest PRESERVED_SPECIMEN Kuykendall, J.R. 47 Oahu BISH 11/1/1942
4 Acacia mearnsii De Wild. Road to Kumuwela Lookout PRESERVED_SPECIMEN Crosby, M.R. Anderson, W.R. Collector Number: 1495 Kauai BISH 6/19/1964
5 Acacia mearnsii De Wild. Highway 11, 47 - 48 mile marker, Kau District, along roadside Roadside. PRESERVED_SPECIMEN Bio, K.F. 01-0040-01 Hawaii BISH 6/4/2001
6 Acacia mearnsii De Wild. palikea PRESERVED_SPECIMEN pearsall, g.a. Oahu BISH 6/11/1954
7 Acacia mearnsii De Wild. na pali-kona forest rserve, unit d; 2km e of kalalau lookout Mesic forest. PRESERVED_SPECIMEN annable, c.r. collector number: 3197 Kauai BISH 12/17/1996
8 Acacia mearnsii De Wild. Kapalama Valley, Koolau Range dry upper forest PRESERVED_SPECIMEN Tongg, R. 52 Oahu BISH 11/1/1942
9 Acacia mearnsii De Wild. kapalama valley, koolau range dry upper forest PRESERVED_SPECIMEN kuykendall, j.r. collector number: 47 Oahu BISH 11/1/1942
10 Acacia mearnsii De Wild. 4.5 miles up Molokai Forest Road, W side of road. Kalamaula Game Mangament Area Lowland mesic forest. PRESERVED_SPECIMEN Hughes, G.D. s.n. Molokai BISH 8/19/1991
11 Acacia mearnsii De Wild. Hilo PRESERVED_SPECIMEN s.n. Hawaii BISH 5/10/1939
12 Acacia mearnsii De Wild. waimea PRESERVED_SPECIMEN little jr., e.l. collector number: 31076 Molokai BISH 8/18/1976
13 Acacia mearnsii De Wild. Road to Kumuwela Lookout PRESERVED_SPECIMEN Crosby, M.R. 1495 Kauai BISH 6/19/1964
14 Acacia mearnsii De Wild. Kokee HUMAN_OBSERVATION Friday, J.B. Kauai 10/10/2013
15 Acacia mearnsii De Wild. lalakoa PRESERVED_SPECIMEN munro, g.c. collector number: 313 Lanai BISH 4/17/1928
16 Acacia mearnsii De Wild. along highway 37 near kula san PRESERVED_SPECIMEN herbst, d.r. collector number: 782 Maui BISH 12/15/1967
17 Acacia mearnsii De Wild. K2, Kahoolawe Restoration/planting site. Substrate: hard pan. Vegetation: Sesuvium portulacastrum. PRESERVED_SPECIMEN Starr, F. 041227-2 Kahoolawe BISH 12/27/2004
18 Acacia mearnsii De Wild. kapalama valley, koolau range Among lava rocks, with Tetramolopium PRESERVED_SPECIMEN tongg, r. collector number: 52 Maui BISH 11/1/1942
19 Acacia mearnsii De Wild. Kokee HUMAN_OBSERVATION Friday, J.B. Kauai 10/10/2013
20 Acacia mearnsii De Wild. hilo PRESERVED_SPECIMEN Kauai BISH 5/10/1939
21 Acacia mearnsii De Wild. Waimea HUMAN_OBSERVATION Friday, J.B. Hawaii 11/8/2010
22 Acacia mearnsii De Wild. 10 mi se of pukalani PRESERVED_SPECIMEN little jr., e.l. collector number: 31092 Maui BISH 8/24/1976
23 Acacia mearnsii De Wild. 4.5 miles up molokai forest road, w side of road. kalamaula game mangament area Lowland mesic forest. PRESERVED_SPECIMEN hughes, g.d. collector number: s.n. Molokai BISH 8/19/1991
24 Acacia mearnsii De Wild. East Maui, 100' E of jct. of Hwy.337 and Haleakala Hwy PRESERVED_SPECIMEN Henrickson, J.S. s.n. Maui BISH 7/13/1969
25 Acacia mearnsii De Wild. East Maui, Ulupalakua, adjacent to Tedeschi Winery, NW of Puu Mahoe Open mesic slope, forming open overstory with Schinus terebinthifolius; understory of Bryophyllum pinnatum or bare soil. PRESERVED_SPECIMEN Imada, C.T. 2002-22 Maui BISH 7/16/2002
26 Acacia mearnsii De Wild. keekeehia, ulupalakua, moo muku dry pasture land, by the side of the road PRESERVED_SPECIMEN woolford, h.a. collector number: 92 Maui BISH 12/22/1955
27 Acacia mearnsii De Wild. Lihue District, approximately 2 km past the arboretum at the top of Kuamoo Road Mesic forest PRESERVED_SPECIMEN C. R. Annable 3197 Kauai HAPI 12/17/1996
28 Acacia mearnsii De Wild. road to kumuwela lookout PRESERVED_SPECIMEN crosby, m.r. anderson, w.r. collector number: 1495 Oahu BISH 6/19/1964
29 Acacia mearnsii De Wild. Lalakoa PRESERVED_SPECIMEN Munro, G.C. 313 Lanai BISH 4/17/1928
30 Acacia mearnsii De Wild. waimea, kokee state park, along kokee-halemanu trail, from camp sloggett to halemanu valley mixed mesophytic forest of Acacia koa and Metrosideros, along ridgetop PRESERVED_SPECIMEN lorence, d.h. flynn, r.; crum, e.; plews, j.h.r. collector number: 5805 Kauai BISH 2/17/1988
31 Acacia mearnsii De Wild. waianae range, ridge south of palikea PRESERVED_SPECIMEN wilbur, r.l. collector number: 541 Kauai BISH 3/26/1948
32 Acacia mearnsii De Wild. east maui, ulupalakua, adjacent to tedeschi winery, nw of puu mahoe Open mesic slope, forming open overstory with Schinus terebinthifolius; understory of Bryophyllum pinnatum or bare soil. PRESERVED_SPECIMEN imada, c.t. puttock, c.; bily, p.; lyons, a.; brown, j. collector number: 2002-22 Maui BISH 7/16/2002
33 Acacia mearnsii De Wild. Na Pali-Kona Forest Rserve, Unit D; 2km E of Kalalau Lookout Mesic forest. PRESERVED_SPECIMEN Annable, C.R. 3197 Kauai BISH 12/17/1996
34 Acacia mearnsii De Wild. Makiki-Tantalus trail PRESERVED_SPECIMEN Garber, D.W. 375 Oahu BISH 4/18/1920
35 Acacia mearnsii De Wild. Waimea, Kokee State Park, along Kokee-Halemanu Trail, from Camp Sloggett to Halemanu Valley mixed mesophytic forest of Acacia koa and Metrosideros, along ridgetop PRESERVED_SPECIMEN Lorence, D.H. 5805 Kauai BISH 2/17/1988
36 Acacia mearnsii De Wild. highway 11, 47 - 48 mile marker, kau district, along roadside PRESERVED_SPECIMEN bio, k.f. collector number: 01-0040-01 Oahu BISH 6/4/2001
37 Acacia mearnsii De Wild. along Highway 37 near Kula San PRESERVED_SPECIMEN Herbst, D.R. 782 Maui BISH 12/15/1967
38 Acacia mearnsii De Wild. Alakai Swamp. High elevation. Moist-wet area. PRESERVED_SPECIMEN Helen Rubin Kauai PTBG 5/25/1975
39 Acacia mearnsii De Wild. Hilo PRESERVED_SPECIMEN Hawaii BISH 5/10/1939
40 Acacia mearnsii De Wild. East Maui, Ulupalakua, adjacent to Tedeschi Winery, NW of Puu Mahoe Open mesic slope, forming open overstory with Schinus terebinthifolius; understory of Bryophyllum pinnatum or bare soil. PRESERVED_SPECIMEN Imada, C.T. Puttock, C.; Bily, P.; Lyons, A.; Brown, J. Collector Number: 2002-22 Maui BISH 7/16/2002
41 Acacia mearnsii De Wild. Waianae Range, ridge south of Palikea PRESERVED_SPECIMEN Wilbur, R.L. 541 Oahu BISH 3/26/1948
42 Acacia mearnsii De Wild. no disponible PRESERVED_SPECIMEN no disponible INECOL
43 Acacia mearnsii De Wild. waimea, road to alakai swamp PRESERVED_SPECIMEN a. chock 401 Oahu F 2/6/1952
44 Acacia mearnsii De Wild. kamiloloa heights PRESERVED_SPECIMEN g. hughes 51 ILL 9/20/1992
45 Acacia mearnsii De Wild. Na Pali-Kona Forest Reserve, Unit D, E of Kokee State Park Headquarters Mesic forest PRESERVED_SPECIMEN C. R. Annable 3197 NY 12/17/1996
46 Acacia mearnsii De Wild. na pali-kona forest reserve, unit d, e of kokee state park headquarters Mesic forest PRESERVED_SPECIMEN c. r. annable 3197 NY 12/17/1996
47 Acacia mearnsii De Wild. Waimea Canyon State Park. Waimea Canyon Lookout. PRESERVED_SPECIMEN Tim Flynn 7240 Kauai PTBG 4/17/2005
48 Acacia mearnsii De Wild. Kokee State Park. Halemanu-Kokee Trail. Disturbed mixed mesophytic forest. PRESERVED_SPECIMEN Tim Flynn 7742 Kauai PTBG 3/5/2014
49 Acacia mearnsii De Wild. Keekeehia, Ulupalakua, Moo Muku. PRESERVED_SPECIMEN H. A. Woolford 92 Maui PTBG 12/22/1955
50 Acacia mearnsii De Wild. Kokee State Park; along Kokee-Halemanu Trail, from Camp Sloggett to Halemanu Valley; alt 1100-1150 m. Mixed mesophytic forest of Acacia koa and Metrosideros along ridgetop. PRESERVED_SPECIMEN David H. Lorence 5805 Kauai PTBG 2/17/1988
51 Acacia mearnsii De Wild. Kokee, Waimea Canyon State Park. Waimea Canyon Lookout. PRESERVED_SPECIMEN Tim Flynn 981 Kauai PTBG 1/9/1985
52 Acacia mearnsii De Wild. Kaonoulu. Growing along Waipoli Rd. in a pasture. PRESERVED_SPECIMEN Hank Oppenheimer H70065 Maui PTBG 7/7/2000
53 Acacia mearnsii De Wild. About half a mile down the road that is the first west road above Iliau Nature Loop. Eucalyptus cf. robusta - Psidium cattleyanum mesic forest PRESERVED_SPECIMEN Dustin Wolkis DMW1247 Kauai PTBG 5/17/2020
54 Acacia mearnsii De Wild. E Maui, 10 mi SE of Pukalani. PRESERVED_SPECIMEN Little Jr., E. L. 31092 Maui US 8/24/1976
55 Acacia mearnsii De Wild. Koaia Tree Sanctuary, 5 mi. nw of Waimea, NW part of Hawaii PRESERVED_SPECIMEN Little Jr., E. L. 31076 Hawaii US 8/18/1976
56 Acacia mearnsii De Wild. Mauka of Lanai City PRESERVED_SPECIMEN Degener, O.; Degener, I. 30181 Lanai US 7/25/1963
57 Acacia mearnsii De Wild. abundant along highway 37 near kula san. PRESERVED_SPECIMEN d. r. herbst 782 Maui US 12/15/1967
58 Acacia mearnsii De Wild. waimea district, kokee state park, along kokee-halemanu trail, from camp sloggett to halemanu valley PRESERVED_SPECIMEN d. h. lorence, t. w. flynn, e. crum & j. plews 5805 Kauai US 2/17/1988
59 Acacia mearnsii De Wild. Waimea, road to Alakai Swamp PRESERVED_SPECIMEN Chock, A. K. 401 Kauai US 2/6/1952
60 Acacia mearnsii De Wild. e maui, 10 mi se of pukalani. PRESERVED_SPECIMEN e. l. little jr. 31092 Maui US 8/24/1976
61 Acacia mearnsii De Wild. Abundant along Highway 37 near Kula San. PRESERVED_SPECIMEN Herbst, D. R. 782 Maui US 12/15/1967
62 Acacia mearnsii De Wild. makiki-tantalus trail PRESERVED_SPECIMEN garber, d.w. collector number: 375 Oahu BISH 4/18/1920
63 Acacia mearnsii De Wild. mauka of lanai city PRESERVED_SPECIMEN o. degener & i. degener 30181 Lanai US 7/25/1963
64 Acacia mearnsii De Wild. k2, kahoolawe Restoration/planting site. Substrate: hard pan. Vegetation: Sesuvium portulacastrum. PRESERVED_SPECIMEN starr, f. starr, k.; higashino, p.k.; price, j. collector number: 041227-2 Kahoolawe BISH 12/27/2004
65 Acacia mearnsii De Wild. Kokee State Park PRESERVED_SPECIMEN Herbst, D. R. 1063 Kauai US 4/18/1968
66 Acacia mearnsii De Wild. near kokee PRESERVED_SPECIMEN degener, o. hatheway, w.h. Kauai BISH 2/9/1950
67 Acacia mearnsii De Wild. PRESERVED_SPECIMEN h. mann & w. t. brigham 588 Maui US
68 Acacia mearnsii De Wild. olinda Artificial pond with carp that drains to ocean. PRESERVED_SPECIMEN degener, o. collector number: 89111 Hawaii BISH 3/26/1952
69 Acacia mearnsii De Wild. Waimea, road to Alakai Swamp PRESERVED_SPECIMEN Chock, A.K. 401 Kauai BISH 2/6/1952
70 Acacia mearnsii De Wild. Kakalahale Game Mangament Area Lowland mesic shrubland. PRESERVED_SPECIMEN Hughes, G.D. s.n. Molokai BISH 12/7/1990
71 Acacia mearnsii De Wild. Na Pali-Kona Forest Rserve, Unit D; 2km E of Kalalau Lookout Mesic forest. PRESERVED_SPECIMEN Annable, C.R. Collector Number: 3197 Kauai BISH 12/17/1996
72 Acacia mearnsii De Wild. Olinda PRESERVED_SPECIMEN Degener, O. 89111 Maui BISH 3/26/1952
73 Acacia mearnsii De Wild. koaia tree sanctuary, 5 mi. nw of waimea, nw part of hawaii PRESERVED_SPECIMEN e. l. little jr. 31076 Hawaii US 8/18/1976
74 Acacia mearnsii De Wild. 10 mi SE of Pukalani PRESERVED_SPECIMEN Little Jr., E.L. 31092 Maui BISH 8/24/1976
75 Acacia mearnsii De Wild. Near Kokee PRESERVED_SPECIMEN Degener, O. s.n. Kauai BISH 2/9/1950
76 Acacia mearnsii De Wild. Keekeehia, Ulupalakua, Moo Muku dry pasture land, by the side of the road PRESERVED_SPECIMEN Woolford, H.A. 92 Maui BISH 12/22/1955
77 Acacia mearnsii De Wild. east maui, haleakala PRESERVED_SPECIMEN andrews, mrs. Maui BISH 2/14/1968
78 Acacia mearnsii De Wild. kakalahale game mangament area Lowland mesic shrubland. PRESERVED_SPECIMEN hughes, g.d. collector number: s.n. Molokai BISH 12/7/1990
79 Acacia mearnsii De Wild. Kamiloloa Heights Edge of Pine forest PRESERVED_SPECIMEN Hughes, G. 51 Molokai US 1992-00-00
80 Acacia mearnsii De Wild. kokee state park PRESERVED_SPECIMEN d. r. herbst 1063 Oahu US 4/18/1968
81 Acacia mearnsii De Wild. PRESERVED_SPECIMEN h. m. curran 19 Maui US
82 Acacia mearnsii De Wild. PRESERVED_SPECIMEN Curran, H. M. 19 Maui US 4/11/2020
83 Acacia mearnsii De Wild. PRESERVED_SPECIMEN h. mann & w. t. brigham 214 Maui US
84 Acacia mearnsii De Wild. Waimea District, Kokee State Park, along Kokee-Halemanu Trail, from Camp Sloggett to Halemanu Valley PRESERVED_SPECIMEN Lorence, D. H.; Flynn, T. W.; Crum, E. L.; Plews, J. 5805 Kauai US 2/17/1988
85 Acacia mearnsii De Wild. east maui, 100' e of jct. of hwy.337 and haleakala hwy yard; Vitex rotundifolia, Wikstroemia uva-ursi PRESERVED_SPECIMEN henrickson, j.s. Midway Atoll BISH 7/13/1969
86 Acacia mearnsii De Wild. Waimea PRESERVED_SPECIMEN Little Jr., E.L. 31076 Hawaii BISH 8/18/1976
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