Stuckenia pectinata

(L.) Börner (1912)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Alismatales Family: Potamogetonaceae Genus: Stuckenia

limu alolo, sago pondweed

Description

Key Characters:

Growth Form: Plants completely submerged.

Stems: Stems filiform, terete (cylindrical), 3–8(–10) dm long, many branched throughout most of their length, arising from slender, creeping rhizomes, these terminated by a slender white tuber 1–1.5 cm long.

Roots: Fibrous root system.

Leaves: Leaves simple. Alternate. Blades filiform, 20–120(–150) mm long, 0.2–0.8(–1) mm wide. Apex attenuate. Surfaces glabrous. 1(3)-veined. Sheathing. Stipules adnate to leaf base, forming a slender sheath around the stem (10–)20–30 mm long, persistent, occasionally spreading from the leaf, the upper portion forming a short hyaline ligule.

Flowers: Flowers in slender spikes 10–30 mm long, usually with 2–6 unequally spaced whorls of flowers, peduncles slender, 10–150(–250) mm long. Flowers small, wind–pollinated, bisexual (perfect), actinomorphic. Perianth of 4 tepals in 1 series, brownish green, 1–1.5 mm long. Stamens 4 in 1 series, opposite the tepals, adnate to the claw; anthers subsessile, dithecal, opening by longitudinal slits, extrorse. Pollen spheric. Ovary superior, carpels 4, distinct, alternate with the stamens; ovule 1, attached to the ventral margin of the carpel usually toward the base, orthotropous, usually becoming campylotropous or anatropous after fertilization; style short, terminal, or absent; stigma dry, not papillose.

Fruit: Fruit obliquely ovoid; 2.5–4.2 mm long; the dorsal keel low; rounded; the 2 lateral keels inconspicuous; style persistent. Seeds without endosperm.

Ploidy: 2n = 42

Habitat: Sparingly naturalized in ponds and along water courses on Ni'ihau and Kaua'i.

Elevation Range: 0–5 m.

Historical Distribution

Synonyms (120)

Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

Ni'ihau(Incl. Lehua) Naturalized
Kaua'i Naturalized
Hawai'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Fl. Deut. Volk: 713 (1912)

Other References

Wagner et al. 1990:1608 (Ni, K [as Potamogeton pectinatus]); Wagner & Herbst 1995:25 (H); Les & Haynes 1997:390/Herbst 1998:4 (COMBNOV:Syn: P. pectinatus = Coleogeton pectinatus); Haynes et al. 1998:241/Herbst & Wagner 1999:30 (NOM:Syn. C. pectinatus)

Occurrences

SNo. Scientific Name Scientific Name Authorship Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Stuckenia pectinata (L.) Börner Loe Lake, 2 mi N of Puuwai In temporary flood water between flooded Prosopis trees. PRESERVED_SPECIMEN St. John, H. 23597 Niihau BISH 3/30/1949
2 Stuckenia pectinata (L.) Börner n end of barking sands, waimea in fresh water irrigation ditch in sugar plantation. PRESERVED_SPECIMEN h. st. john, r. s. cowan, g. l. webster & r. l. wilbur 22968 Kauai US 12/23/1947
3 Stuckenia pectinata (L.) Börner hilo; wailoa estuary Submerged in water. PRESERVED_SPECIMEN stemmermann, r.l. luce, l. collector number: 7179 Hawaii BISH 7/25/1987
4 Stuckenia pectinata (L.) Börner N end of Barking Sands, Waimea in fresh water irrigation ditch in sugar plantation. PRESERVED_SPECIMEN St. John, H.; Cowan, R. S.; Webster, G. L.; Wilbur, R. L. 22968 Kauai US 12/23/1947
5 Stuckenia pectinata (L.) Börner loe lake, 2 mi. n of punawai In temporary flood water between flooded Prosopis trees. PRESERVED_SPECIMEN st.john, h. collector number: 23597 Niihau BISH 3/30/1949
6 Stuckenia pectinata (L.) Börner waimea: north end of barking sands In fresh water of irrigation ditch in sugar plantation. PRESERVED_SPECIMEN st.john, h. cowan, r.s.; webster, g.l.; wilbur, r.l. collector number: 22968 Kauai BISH 12/23/1947
7 Stuckenia pectinata (L.) Börner Waimea: North end of Barking Sands In fresh water of irrigation ditch in sugar plantation. PRESERVED_SPECIMEN St. John, H. 22968 Kauai BISH 12/23/1947
8 Stuckenia pectinata (L.) Börner Hilo; Wailoa estuary Submerged in water. PRESERVED_SPECIMEN Stemmermann, R.L. 7179 Hawaii BISH 7/25/1987