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Azolla filiculoides

Lam. (1783)

This name is accepted

Kingdom: Viridiplantae Phylum: Pteridophyta Class/Clade: Polypodiopsida Order: Salviniales Family: Salviniaceae Genus: Azolla

ferny azolla, large mosquito fern

Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

Sori:

Gametophyte:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Naturalized
O'ahu Naturalized
Molokai Naturalized
Lana'i Not in flora
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents


Bibliography

Name Published In: Encycl. 1: 343 (1783)

Other References

Palmer 2003:78 (K, O, Mo, L, M, H); Wilson 2003:5 (H); Staples & Herbst 2005:30 (DESCR); Imada & Kennedy 2020:86 (NEWNAT/O [as A. caroliniana]); Faccenda, Arthur, et al. 2025:210 (A. caroliniana misapplied = A. filiculoides); Note: remove L [no spms. to substantiate its presence, Jun 2025]

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Azolla filiculoides Keanae, Keanae Arboretum Taro patches Preserved_Specimen Hobdy, R.W. 1872 Maui BISH 1983-10-15
2 Azolla filiculoides Hamakua District, Waipio Valley, taro farm ca. 2 miles into the valley Small floating fern in taro paddy. Preserved_Specimen Imada, C. 9916 Hawaii BISH 1999-06-19
3 Azolla filiculoides Pukoo Floating in water in ditch along edge of field Preserved_Specimen Wilson, K.A. 2446 Molokai BISH 1994-06-05
4 Azolla filiculoides East Maui, Hana District, Hana Highway, Waikani Bridge Found on base of cliff face, above road on west side of stream. Growing in water seep, not standing water Preserved_Specimen Bruegmann, M.M. 190 Maui BISH 1987-02-15
5 Azolla filiculoides Kailua; edge of Kaelepulu Pond N & W borders Preserved_Specimen Neal, M.C. Oahu BISH 1940-05-30
6 Azolla filiculoides Kailua, Kaelepulu Pond Preserved_Specimen Banner 942 Oahu BISH 1948-04-01
7 Azolla filiculoides Honolulu, Manoa Valley Floating in taro patch. Preserved_Specimen Fosberg, F.R. 13833 Oahu BISH 1937-05-22
8 Azolla filiculoides W Maui, Kahakuloa Valley, Kahakuloa Floating on water in taro patches on side of road Preserved_Specimen Wilson, K.A. 60 Maui BISH 1951-12-23
9 Azolla filiculoides 96 Puiwa Lane, Honolulu Edge of taro patch Preserved_Specimen Neal, M.C. Oahu BISH 1940-03-31
10 Azolla filiculoides Laie Taro patch Preserved_Specimen Bryan Jr., E.H. Oahu BISH 1952-07-19
11 Azolla filiculoides Private lotus farm, Waialua Beach Road, Waialua Floating on surface of water. Preserved_Specimen Imada, C. 9248 Oahu BISH 1992-04-05
12 Azolla filiculoides Kahana Valley taro patch Preserved_Specimen Stemmermann, R.L. 3707 Oahu BISH 1979-02-11
13 Azolla filiculoides Kipu Point, above Keawanui Bay (N. Molokai), home garden Floating aquatic herb in taro parch Preserved_Specimen Lorence, D.H. 5475 Molokai BISH 1987-08-01
14 Azolla filiculoides Kailua, Kaelepulu Pond, west borders Edge of Pond. Preserved_Specimen Neal, M.C. Oahu BISH 1940-06-11
15 Azolla filiculoides Hamakua District, Kukuihaele quad, Waipio Valley Floating fern forming a carpet of red on water surface of taro lo'i. Preserved_Specimen Imada, C. 20018 Hawaii BISH 2001-03-13
16 Azolla filiculoides Hanalei Floating on pond with Lemna minor. Preserved_Specimen Department of Agriculture and Conservation Kauai BISH 1961-10-19
17 Azolla filiculoides Haleiwa Pond Preserved_Specimen Fosberg, F.R. 27124 Oahu BISH 1946-10-20
18 Azolla filiculoides Kauai County: Above Kauai Biomass Power Facility, on dirtroad East of Kahili Mt. Park. In a canal in a fallow cane field. w/ Desmodium triflorum, Plantago major, Megathyrsus maximus, Mimosa pudica, Commelina diffusa, Centella asiatica, Preserved_Specimen Tangalin, N 5126 Kauai BISH 2021-02-16
19 Azolla filiculoides Waimanalo; Leilani Nursery, 41-630 Kaulukanu St Floating aquatic in ponds w/water lilies. Preserved_Specimen Staples, G.W. 757 Oahu BISH 1991-11-16
20 Azolla filiculoides Near Smith-Bronte Landing site Floating in water in taro patch Preserved_Specimen Wilson, K.A. 2447 Molokai BISH 1994-06-05
21 Azolla filiculoides Kailua, Kaelepulu Pond, north & west borders Edge of Pond. Preserved_Specimen Neal, M.C. Oahu BISH 1940-05-30
22 Azolla filiculoides Morgan Toledo Taro Farm, Waipio Valley, Big Island, Hawaii Floating on the surface of the water, creating a solid mat of red. Preserved_Specimen Crago, L.M. 2005090 Hawaii BISH 2005-03-19
23 Azolla filiculoides Kawaihapai Naturalized in slightly brackish pond Preserved_Specimen Degener, O. 12913 Oahu BISH 1940-09-15
24 Azolla filiculoides Honolulu, Kalakaua Ave Floating in irrigation ditches. Preserved_Specimen Fosberg, F.R. 13815 Oahu BISH 1937-05-03
25 Azolla filiculoides Honolulu, Kanewai Area, Dole St A floating plant carpeting the surface of a sparsely planted taro patch. Most of the plants are in full sun; some shaded Preserved_Specimen Lau, J. 1616 Oahu BISH 1985-11-06
26 Azolla filiculoides Kapolei, Lowes Garden Center at the intersection of Kapolei Pkwy and Kapolei Blvd Weed around garden center area, seen growing only in pots of plants which are for sale Preserved_Specimen Faccenda, K. 2536 Oahu BISH 2022-07-11
27 Azolla filiculoides Hamakua Dist. Kemau 1. Lower Hamakua irrigation ditch Growing on wet, rotten sides of a wooden flume. Preserved_Specimen Herbst, D.R. 9785 Hawaii BISH 1996-07-10
28 Azolla filiculoides Hwy. 56, outside Hanalei Floating in ditch next to taro fields. Preserved_Specimen Wagner, W.L. 5188 Kauai BISH 1983-12-21
29 Azolla filiculoides Limahuli Valley (Botanical Garden), Napali Coast In stream and in ponds and on very wet ground, especially luxuriant in stream Preserved_Specimen Fosberg, F.R. 57444 Kauai BISH 1978-03-31
30 Azolla filiculoides Near Ala Moana Open marsh, near large nos. of Typha Preserved_Specimen Neal, M.C. 1191 Oahu BISH 1939-12-02
31 Azolla filiculoides Honolulu Watercress garden Preserved_Specimen Krauss, F.G. Oahu BISH 1938-09-29
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