img

Ipomoea imperati

(Vahl) Griseb. (1866)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Asterids Order: Solanales Family: Convolvulaceae Genus: Ipomoea

beach morning glory, hunakai

img

Description

Key Characters:

Growth Form: Perennial vines.

Stems: Stems trailing and rooting at the nodes, herbaceous to fleshy, up to 4 m or more long, glabrous.

Roots:

Leaves: Leaves simple. Alternate. Blades variable in shape, usually linear, lanceolate, ovate to oblong, 1.5–4(–6) cm long, the size varying greatly with habitat. Apex rounded to obtuse, emarginate or occasionally bilobed. Base obtuse, truncate to cordate. Surfaces glabrous; blades fleshy. Margins entire to undulate or 5–7-lobed, often on the same plant. Petiolate. Stipules absent.

Flowers: Flowers usually solitary in the leaf axils, pedicels 8–15 mm long, pedicels long or short, bracts scale-like to foliose. Flowers bisexual (perfect), actinomorphic, 5-merous. Calyx of 5 sepals, distinct, imbricate, subcoriaceous, oblong, the 3 inner ones 10–15 mm long, the outer 2 somewhat shorter, glabrous, apex acute to obtuse, mucronulate, often somewhat enlarging in fruit but not markedly accrescent, persistent, occasionally accrescent. Corolla of 5 fused petals,limb white, the throat yellow or basally purple in New World plants, funnelform, 3.5–5 cm long. Stamens 5, distinct; included or rarely exserted; filaments inserted on corolla tube base alternate with corolla lobes; anthers dithecal, usually linear or oblong, extrorse. Ovary superior, 2–4-carpellate, usually with as many cells, placentation basal or basal-axile; ovules 2(4, 6) per cell, or ovary 1-celled and ovules 4, these erect, anatropous; style 1, filiform, simple or bifid, or sometimes with 2 distinct style; stigma globose or 2–3-lobed, the lobes globose.

Fruit: Capsules brown; globose to ovoid; 0.8–1.2 cm long; dehiscent by 4 valves or rarely 6 valves; or splitting irregularly. Seeds 1–4; pale brown; 8–9 mm long; short–tomentose and with longer woolly hairs on the margins; endosperm absent or scanty; cartilaginous; cotyledons usually foliaceous.

Ploidy: 2n = 2n = 30

Habitat: Occurring on beaches and sand dunes.

Elevation Range: 0–20 m.

Historical Distribution

Images

img
img

Uses and Culture

USES

Natural History

Statewide Status

Indigenous

Island Status

Ni'ihau(Incl. Lehua) Indigenous
Kaua'i Indigenous
O'ahu Indigenous
Molokai Indigenous
Maui Indigenous

Dispersal Agents


Pollinators

Bibliography

Name Published In: Cat. Pl. Cub.: 203 (1866)

Other References

Wagner et al. 1990:556 (Ni, K, O, Mo, M)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Ipomoea imperati Kipukai Preserved_Specimen Alexander, A.M. 5333 Kauai BISH 1948-04-30
2 Ipomoea imperati Kekaha Trailing in sand at top of beach. Preserved_Specimen Flowers: white St.John, H. 22969 Kauai BISH 1947-12-23
3 Ipomoea imperati Kauai Preserved_Specimen Lydgate, J.M. Kauai BISH
4 Ipomoea imperati west of Kahuku point Preserved_Specimen Neal, M.C. Oahu BISH 1938-08-06
5 Ipomoea imperati Mahaulepu On eroding dunes at head of bay. Mixed with Ipomoea pes-caprae Preserved_Specimen Austin, D.F. 7458 Kauai BISH 1985-05-08
6 Ipomoea imperati On sand dunes and in loose sand back of beach, Barking sands Plants covered with sand, only leaf lamina and flowers exposed. Preserved_Specimen Flowers white with bright yellow inner surface of tube; tube pale yellow out. Leaves somewhat fleshy. Herbst, D.R. 992 Kauai BISH 1968-03-29
7 Ipomoea imperati Halawa, Top of coral sand beach Preserved_Specimen St.John, H. 23406 Molokai BISH 1948-12-21
8 Ipomoea imperati west of Kahuku point Preserved_Specimen Neal, M.C. Oahu BISH 1938-08-06
9 Ipomoea imperati Mahaulepu, Haula; covering sand dunes bck of beach. Preserved_Specimen Leaves fleshy, pale green, flowers white with a yellow throat; stems mostly buried in sand, rooting at nodes. Herbst, D.R. 2348 Kauai BISH 1972-01-28
10 Ipomoea imperati Kawaihapai In coastal dunes just above sea-stems and petioles covered by sand-rare. Preserved_Specimen Degener, O. 9956 Oahu BISH 1935-07-15
11 Ipomoea imperati North of Barking Sands Deeply buried in coastal dunes Preserved_Specimen Degener, O. 3364 Kauai BISH 1926-06-13
12 Ipomoea imperati Between Barbers Point and Pearl Harbor in sand just above high tide mark Preserved_Specimen Degener, O. 5976 Oahu BISH 1932-05-08
13 Ipomoea imperati Pounder's Beach In sand. Preserved_Specimen Corn, C. Oahu BISH 1984-04-13
14 Ipomoea imperati Kaununui Trailing, nearly buried in coral sand of foredune Preserved_Specimen Corolla tube pale greenish on lower part without, greenish yellow in eye, white elsewhere. St.John, H. 22717 Niihau BISH 1947-08-11
15 Ipomoea imperati Waimea District. Polihale State Park, dunes in fron t of reef zone near Queens Pond. Coastal dry shrubland mixed community, sand dunes and lithified sand outcrops, with Chamaesyce celastro8ides var. stokesii, Scaevola taccada, Sida fallax, Sporobolus virginicus, Ipomoea imperati, Nama sandwicensis, Vitex rotundifolia, Watheria indica, Boehavia repens, Preserved_Specimen vining along sand dunes, rooting at nodes, corolla whitish, throat with a little yellow, common Wood, K.R. 15849 Kauai BISH 2014-02-27
16 Ipomoea imperati Barking Sands Preserved_Specimen Skottsberg, C.J.F. 1061 Kauai BISH 1922-02-11
17 Ipomoea imperati Laniloa Point On beach just behind and in Saevola taccada bush. Preserved_Specimen Creepy with white stolons. Leaves dull green. flwr creamy white with darker episepalous lines. van Royen, P. 10249 Oahu BISH 1968-07-07
18 Ipomoea imperati Haleiwa coastal dune in clean sand Preserved_Specimen Degener, O. 1663 Oahu BISH 1923-05-31
19 Ipomoea imperati 1/2 mile west of Kamala Point Along beach strand. Preserved_Specimen Corn, C. Kauai BISH 1978-06-14
20 Ipomoea imperati Mokuleia Beach Park Growing among Scaevola taccada. Herb with or without runners. Preserved_Specimen Leaves subfleshy, greyish green above, light green below. flws white but tube and episepalous lines on outside creamy white, tube on inside sulphur yellow. van Royen, P. 10197 Oahu BISH 1968-02-18
21 Ipomoea imperati Waihu Beach On sand, with Boerhaavia diffusa and Sesuvium portulacastrum. Preserved_Specimen Sub-herbaceous, small sections, 5cm, of vine appearing in isolation, the main plant arootstoch below the sand fl. white. Woolford, H.A. 192 Maui BISH 1956-01-01
22 Ipomoea imperati Barking Sands On sand dunes and in loose sand back of beach. Plants covered with sand, only leaf lamina and flowers exposed. Preserved_Specimen Flws white with bright yellow inner surface of tube; tube pale yellow out. Leaves somewhat fleshy. Herbst, D.R. 992 Kauai BISH 1968-03-29
23 Ipomoea imperati Kawaihapai coastal dune Preserved_Specimen Degener, O. 5986 Oahu BISH 1931-06-01
24 Ipomoea imperati Beach Ipomoea stolonifera (Cyrill.) Poir. Preserved_Specimen Topping, D.L. 6005 Maui BISH 1927-08-05
25 Ipomoea imperati Barking Sands Sand dunes Preserved_Specimen stems prostrate, buried under sand, only leaves and flowers exposed. Fls white with yellow center. Fosberg, F.R. 12733 Kauai BISH 1935-12-30
26 Ipomoea imperati beach N.W Kahalui along beach, in sand Preserved_Specimen stems buried in sand fls. White Fosberg, F.R. 982 Maui BISH 1933-08-17
27 Ipomoea imperati Halawa Valley, Molokai, T. Hawaii Ipomoea stolonifera (Cyrill.) Poir. Preserved_Specimen (Corolla white with tulee yellow withuin.) Degener, O. 5992 Molokai BISH 1928-06-20
28 Ipomoea imperati along beach between Kaena Pt. and Kaiaka Bay, north shore of O'ahu Coral sand ridges along beach Preserved_Specimen Harris, J.A. 242198 Oahu BISH 1924-09-04
29 Ipomoea imperati Kauai Preserved_Specimen Stone, B.C. 732 Kauai BISH 1955-06-01
30 Ipomoea imperati Waimea Arboretum Preserved_Specimen Vines prostrate in full sun. Rooted in a limestone substrate. flowers white with a lemon yellow center; odorless (morning) Lau, J. 2375 Oahu BISH 1986-05-12
31 Ipomoea imperati Lualualei Beach Preserved_Specimen Forbes, C.N. 1925 Oahu BISH 1914-07-01
32 Ipomoea imperati Mokuleia, near the shore Preserved_Specimen Forbes, C.N. 1811 Oahu BISH 1912-04-26
Back to Top