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Pontederia vaginalis

Burm.f. (1768)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Commelinales Family: Pontederiaceae Genus: Pontederia

cordate monochoria, pickerel weed

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Description

Key Characters:

Growth Form: Aquatic perennial herbs from creeping rootstocks.

Stems: Stems usually inconspicuous, obliquely erect.

Roots: Fibrous root system.

Leaves: Leaves simple. Alternate. Blades linear to ovate, usually 5–10 cm long, 1.5–3 cm wide, cauline leaves smaller. Apex acuminate. Base rounded or cordate. Margins entire. Veins acrodromous. Sheathing and tubular. Stipules present 3.5–5.7 cm.

Flowers: Flowers few to numerous in racemes 2–4 cm long, peduncles emerging from the sheath of the uppermost leaf, 2–10 mm long, terminal. Flowers bisexual (perfect); Pedicels 3–6 mm long. Perianth in two series lobes purplish blue, oblong, 8–12 mm long. Stamens 6, 1 larger than others. Ovary superior, 3-celled; ovules numerous.

Fruit: Capsules ellipsoid; ca. 1 cm long. Seeds oblong; with 8–12 longitudinal ribs.

Ploidy: 2n = 26; 28; 52; 60; 72; 74; 80

Habitat: Naturalized in taro paddies and slow–moving streams.

Elevation Range: 0–30 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
Hawai'i Naturalized

Dispersal Agents


Pollinators

Specimens

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Bibliography

Name Published In: Fl. Indica: 80 (1768)

Other References

Wagner et al. 1990:1606 (K, O [as Monochoria vaginalis]); Wagner & Herbst 1995:23 (H); Staples & Herbst 2005:752 (DESCR); Oppenheimer 2011:9 (Mo); Pellegrini et al. 2018:61 (Syn. M. vaginalis = P. vaginalis)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Pontederia vaginalis In bed of irrigation ditch in bog above Kilauae Agronomics Occasional; Partly submerged aquatic. PRESERVED_SPECIMEN Hume, L. 355 Kauai BISH 10/21/1988
2 Pontederia vaginalis Waikane In taro patch. PRESERVED_SPECIMEN Suehiro, A. s.n. Oahu BISH 4/1/1934
3 Pontederia vaginalis waikane-schofield trail, waikane, koolau range. stream crossing road to ditch tender's house PRESERVED_SPECIMEN cowan, r.s. collector number: 24 Kauai BISH 7/29/1946
4 Pontederia vaginalis Machuu Taro Farm, Waipio Valley, Big Island, Hawaii Grwoing throughout fallow taro loi in 2 inches of water. PRESERVED_SPECIMEN Crago, L.M. Imada, C.; Erickson, T.; Puttock, C. Collector Number: 2005-111 Hawaii BISH 3/19/2005
5 Pontederia vaginalis Waikane-Schofield trail, Waikane, Koolau Range. Stream crossing road to Ditch Tender's house In stream. PRESERVED_SPECIMEN Cowan, R.S. 24 Oahu BISH 7/29/1946
6 Pontederia vaginalis Wailau Valley. lo'I kalo and adjacent muddy areas. PRESERVED_SPECIMEN Oppenheimer, H. L.; Perlman, S. P. H100903 Molokai US 10/11/2009
7 Pontederia vaginalis Koolau Mts., bottom of Kahaluu Valley In water in taro patch. PRESERVED_SPECIMEN Fosberg, F.R. 12204 Oahu BISH 7/4/1935
8 Pontederia vaginalis Hanalei Distr., Kahili ahupuaa, on margin of southern arm of Puu Ka Ele Reservoir Growing on mucky soil with Ludwigia octovalvis and Brachiaria mutica. PRESERVED_SPECIMEN Imada, C.T. 2001-64 Kauai BISH 9/27/2001
9 Pontederia vaginalis Hanalei Distr., Kahili ahupuaa, on margin of southern arm of Puu Ka Ele Reservoir Growing on mucky soil with Ludwigia octovalvis and Brachiaria mutica. PRESERVED_SPECIMEN Imada, C.T. Collector Number: 2001-64 Kauai BISH 9/27/2001
10 Pontederia vaginalis waipio valley In ditch on valley floor with other wetland weeds. PRESERVED_SPECIMEN stemmermann, r.l. luce, l. collector number: 7174 Oahu BISH 7/19/1987
11 Pontederia vaginalis kahaluu valley, koolau range, oahu PRESERVED_SPECIMEN f. r. fosberg 12204 NY 7/4/1935
12 Pontederia vaginalis In bed of irrigation ditch in bog above Kilauea Agronomics. Occasional. PRESERVED_SPECIMEN Tim Flynn 355 Kauai PTBG 10/21/1988
13 Pontederia vaginalis Hanapepe Valley. In wetland taro field between Ko Road and Hanapepe River. In muck with Azolla and cultivated Colocasia. PRESERVED_SPECIMEN Tim Flynn 2274 Kauai PTBG 8/3/1987
14 Pontederia vaginalis Wailau Valley. Kalo loi and adjacent muddy areas. PRESERVED_SPECIMEN Hank Oppenheimer H100903 Molokai PTBG 10/11/2009
15 Pontederia vaginalis wailau valley. lo`i kalo and adjacent muddy areas. PRESERVED_SPECIMEN h. l. oppenheimer & s. p. perlman h100903 MU 10/11/2009
16 Pontederia vaginalis oahu. waikane PRESERVED_SPECIMEN o. degener 2110 NY 7/9/1926
17 Pontederia vaginalis waikane, oahu PRESERVED_SPECIMEN d. l. topping 3289 NY 6/27/1926
18 Pontederia vaginalis Princeville, below Kapi'olani Loop. PRESERVED_SPECIMEN Lynwood Hume 352 Kauai PTBG 8/28/1988
19 Pontederia vaginalis machuu taro farm, waipio valley, big island, hawaii Grwoing throughout fallow taro loi in 2 inches of water. PRESERVED_SPECIMEN crago, l.m. imada, c.; erickson, t.; puttock, c. collector number: 2005-111 Hawaii BISH 3/19/2005
20 Pontederia vaginalis morgan toledo taro farm, waipio valley, big island. Taro loi in 2 inches of water. PRESERVED_SPECIMEN l. crago, c. imada, t. erickson & c. puttock 2005-111 Hawaii US 3/19/2005
21 Pontederia vaginalis wailau valley. kalo`lo`i and adjacent muddy areas. PRESERVED_SPECIMEN h. l. oppenheimer & s. p. perlman h100903 Molokai US 10/11/2009
22 Pontederia vaginalis Wailau Valley. lo`I kalo and adjacent muddy areas. PRESERVED_SPECIMEN H. L. Oppenheimer & S. P. Perlman H100903 Molokai US 10/11/2009
23 Pontederia vaginalis Morgan Toledo Taro Farm, Waipio Valley, Big Island. Taro loi in 2 inches of water. PRESERVED_SPECIMEN L. Crago, C. Imada, T. Erickson & C. Puttock 2005-111 Hawaii US 3/19/2005
24 Pontederia vaginalis Wailau Valley. Kalo'lo'I and adjacent muddy areas. PRESERVED_SPECIMEN Oppenheimer, H. L.; Perlman, S. P. H100903 Molokai US 10/11/2009
25 Pontederia vaginalis Morgan Toledo Taro Farm, Waipio Valley, Big Island. Taro loi in 2 inches of water. PRESERVED_SPECIMEN Crago, L. M.; Imada, C. T.; Erickson, T.; Puttock, C. F. 2005-111 Hawaii US 3/19/2005
26 Pontederia vaginalis in bed of irrigation ditch in bog above kilauae agronomics Occasional; Partly submerged aquatic. PRESERVED_SPECIMEN hume, l. flynn, t.; sloan, s. collector number: 355 Kauai BISH 10/21/1988
27 Pontederia vaginalis Waipio Valley In ditch on valley floor with other wetland weeds. PRESERVED_SPECIMEN Stemmermann, R.L. 7174 Oahu BISH 7/19/1987
28 Pontederia vaginalis Wailau Valley In lo`I kalo and adjacent muddy areas PRESERVED_SPECIMEN Oppenheimer, H.L. H100903 Molokai BISH 10/11/2009
29 Pontederia vaginalis waikane In taro patch. PRESERVED_SPECIMEN suehiro, a. collector number: s.n. Oahu BISH 4/1/1934
30 Pontederia vaginalis hanalei distr., kahili ahupuaa, on margin of southern arm of puu ka ele reservoir PRESERVED_SPECIMEN imada, c.t. collector number: 2001-64 Oahu BISH 9/27/2001
31 Pontederia vaginalis koolau mts., bottom of kahaluu valley In water in taro patch. PRESERVED_SPECIMEN fosberg, f.r. collector number: 12204 Oahu BISH 7/4/1935
32 Pontederia vaginalis Machuu Taro Farm, Waipio Valley, Big Island, Hawaii Grwoing throughout fallow taro loi in 2 inches of water. PRESERVED_SPECIMEN Crago, L.M. 2005-111 Hawaii BISH 3/19/2005
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