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Ipomoea obscura

(L.) Ker Gawl. (1817)

This name is accepted

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

obscure morning glory

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Description

Key Characters:

Growth Form: Vines.

Stems: Stems twining or sometimes prostrate, herbaceous, slender, up to ca. 3 m long, glabrate or sometimes pilose.

Roots:

Leaves: Leaves simple. Alternate. Blades ovate to cordate, 2.7-9 cm long. Apex acuminate or apiculate. Base cordate. Surfaces pubescent or glabrate; blades chartaceous. Margins entire. Petioles about as long as blades. Stipules absent.

Flowers: Flowers solitary or several, usually axillary, peduncles 3.5-4 cm long, pedicels 10-20 mm long, bracts scalelike. Flowers bisexual (perfect), actinomorphic, 5-merous. Calyx of 5 sepals, distinct, imbricate, herbaceous to subcoriaceous, equal or unequal, narrowly to broadly ovate, 4-8 mm long, minutely verrucose, glabrous or sparsely pilose, margins scarious, apex acute or apiculate; often somewhat enlarging in fruit but not markedly accrescent, persistent, occasionally accrescent. Corolla of 5 fused petals; petals yellow or orange to white, usually the limb white and nectar-guides yellow, the throat purple or brown-tinged, campanulate, 1.4-2.5 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; 0.8-1.2 cm long; glabrous; dehiscent by 4 valves or rarely 6 valves; or splitting irregularly. Seeds 1-4; black; ovoid; 5-5.5 mm long; appressed pubescent or velvety pubescent; endosperm absent or scanty; cartilaginous; cotyledons usually foliaceous.

Ploidy: 2n = 30

Habitat: Naturalized in dry; disturbed areas.

Elevation Range: 3–250 m.

Historical Distribution

Images

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Synonyms (39)

Convolvulus curassavicus (Balb. ex Roem. & Schult.) Colla (1835)
Convolvulus gonatodes Steud. ex A.Rich. (1850)
Convolvulus insuavis (Blume) D.Dietr. (1839)
Convolvulus obscurus L. (1762)
Convolvulus ocularis (Bartl.) Endl. (1842)
Convolvulus pilifer Steud. (1840)
Convolvulus pilosus R.Br. (1814)
Convolvulus subangularis Buch.-Ham. ex Steud. (1840)
Convolvulus trigonus Buch.-Ham. ex Wall. (1829)
Ipomoea acutiflora A.Rich. (1850)
Ipomoea brownii Roem. & Schult. (1819)
Ipomoea curassavica Balb. ex Roem. & Schult. (1819)
Ipomoea demissa Hallier f. (1893)
Ipomoea fragilis Choisy (1845)
Ipomoea fragilis var. glabra Hallier f. (1899)
Ipomoea fragilis var. pubescens Hallier f. (1899)
Ipomoea inconspicua Baker (1894)
Ipomoea insuavis Blume (1823)
Ipomoea koloaensis H.Lév. (1911)
Ipomoea longipes Engl. (1888)
Ipomoea luteola R.Br. (1810)
Ipomoea micrantha var. hispida Hallier f. (1898)
Ipomoea obscura f. concolor Naik & Zate (1998)
Ipomoea obscura var. abyssinica Hallier f. (1898)
Ipomoea obscura var. demissa (Hallier f.) Verdc. (1978)
Ipomoea obscura var. fragilis (Choisy) A.Meeuse (1956)
Ipomoea obscura var. glabra Choisy (1845)
Ipomoea obscura var. indica Hallier f. (1899)
Ipomoea obscura var. longipes C.H.Wright (1904)
Ipomoea obscura var. obscura
Ipomoea obscura var. sagittifolia Verdc. (1958)
Ipomoea ocularis Bartl. (1839)
Ipomoea oculata (Naudin ex Huber) Huber (1871)
Ipomoea saltiana Rendle (1894)
Ipomoea solanifolia Burm.f. (1768)
Ipomoea tenuis E.Mey. ex Hallier f. (1893)
Ipomoea villicaulis Domin (1928)
Merremia geophiloides A.Chev. (1933)
Quamoclit oculatus Naudin ex Huber (1870)

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Naturalized
O'ahu Naturalized
Molokai Naturalized
Lana'i Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Bot. Reg. 3: t. 239 (1817)

Other References

Wagner et al. 1990:557 (K, O, M, H); Oppenheimer 2003:10 (Mo); Staples & Herbst 2005:247 (KEY), 250 (DESCR); Oppenheimer 2007:22 (L)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Ipomoea obscura below Castle Hospital Preserved_Specimen Smith, L.B. 89 Oahu BISH 1976-03-27
2 Ipomoea obscura Manana Ridge Trail Lowland mesic forest UNKNOWN . Coordinates do not match to country in source data. Not found a country in reverser geocoding. Bioversity International C. R. Annable Oahu HAPI 9/23/1996
3 Ipomoea obscura Makiki Forestry Nursery Preserved_Specimen Corn, C. Oahu BISH 1978-01-27
4 Ipomoea obscura Lihue Preserved_Specimen Barnum, C.C. Kauai BISH 1935-03-30
5 Ipomoea obscura Makiki Forestry Nursery Preserved_Specimen Corn, C. Oahu BISH 1978-01-27
6 Ipomoea obscura Kapalama Hts., Kamehameha Girls' School Preserved_Specimen Neal, M.C. Oahu BISH 1932-06-06
7 Ipomoea obscura Kawaihau, Aliomanu abandoned pineapple fields Preserved_Specimen vine with off-white flowers Herbst, D.R. 5657 Kauai BISH 1976-02-23
8 Ipomoea obscura Kapalama Hts., Kamehameha Girls' School Preserved_Specimen Neal, M.C. Oahu BISH 1932-06-06
9 Ipomoea obscura Kamehameha Heights, Honolulu waste ground Preserved_Specimen fl. yellow Christophersen, E. 1633 Oahu BISH 1931-03-03
10 Ipomoea obscura Honolulu, Makiki, 1099 Green St Growing on fence. Preserved_Specimen Vine, corolla white, with fruit. Kennedy, B. 13 Oahu BISH 1995-11-21
11 Ipomoea obscura Koloa, Kalaheo, along Niho Road and Kaloke Road Secondary vegetation along roadside near cane field and houses. Preserved_Specimen Herbaceous vine growing over low herbs. Corolla white with dark purple spot in center Lorence, D.H. 5818 Kauai BISH 1988-02-21
12 Ipomoea obscura Hulopoe Occasional in waste areas. Preserved_Specimen Flowers open midday. Oppenheimer, H.L. 100641 Lanai BISH 2006-10-20
13 Ipomoea obscura Manoa roadside thicket Preserved_Specimen corolla uniform pale yellow; tube dark purple at base within, paler yellow without Priest, C. Oahu BISH 1930-03-30
14 Ipomoea obscura Kona, between Keauhou Bay and Mamalahoa Highway along highway Preserved_Specimen vine with cream-colored flowers Herbst, D.R. 5383 Hawaii BISH 1975-06-24
15 Ipomoea obscura Kamalo Roadside. Climbing alien vegetation. Preserved_Specimen Weed; flowers white. Oppenheimer, H.L. 110132 Molokai BISH 2001-11-18
16 Ipomoea obscura West slope of Ulupau Head along abandoned road; fairly common in thick Leucaena scrub Preserved_Specimen twiner, flowers cream-color with dark purple center Fosberg, F.R. 58852 Oahu BISH 1978-12-10
17 Ipomoea obscura Highway between Laie and Kahuku loam Preserved_Specimen stems creeping, twining; leaves heart-shaped, flowers white to cream colored Lee, P. 4 Oahu BISH 1975-02-08
18 Ipomoea obscura Koolau Range, Kaneohe, 47-285 Pulama Rd., Senator Fong's Plantation and Garden with Schefflera and Schinus; lowland mesic forest Preserved_Specimen vine; flowers white Annable, C.R. 3037 Oahu BISH 1996-09-23
19 Ipomoea obscura Waimanalo, jct. of Hihimanu and Kalanianaole Hwy., Azevedo Field roadside Preserved_Specimen Wagner, W.L. 4822 Oahu BISH 1983-06-04
20 Ipomoea obscura Central ditch on sugar cane field Preserved_Specimen fls. pale sulfur yellow, with purple-black base of throat. Iltis, H.H. 255 Oahu BISH 1967-07-04
21 Ipomoea obscura East Maui, Kaupo, along highway at Nuu trailing over Panicum maximum and climbing in Leucaena Preserved_Specimen Hobdy, R.W. 2335 Maui BISH 1985-04-09
22 Ipomoea obscura Laie, BYU-HC clay Preserved_Specimen flower creamy color; leaves cordate, stem creeping, rooting at node Wong, A. 4 Oahu BISH 1980-12-08
23 Ipomoea obscura Kipapa Gulch, Waipahu waste places near mouth of stream Preserved_Specimen Hosaka, E.Y. 1248 Oahu BISH 1933-12-17
24 Ipomoea obscura 1940 Manoa Road full sun Preserved_Specimen weed twining on shrubbery. Flowers white to cream, with a maroon center; odorless (morning) Lau, J. 2576 Oahu BISH 1986-06-26
25 Ipomoea obscura Honolulu, Kalihi St., near Bishop Museum waste lots Preserved_Specimen Hume, E.P. Oahu BISH 1931-06-03
26 Ipomoea obscura Hulu, Maui. On S side of island near coast on south side of island near coast Preserved_Specimen Rare to occasional. One patch on south side of island near coast which was pulled. Starr, F. 5040425 Maui BISH 2005-04-04
27 Ipomoea obscura Honolulu, Kalihi St. near Beckwith St Farrington High School fence Preserved_Specimen vine, fls. light-yellow, center purple Kelsey, T. Oahu BISH 1960-08-04
28 Ipomoea obscura Laie, BYU-HC kaolite clay with coral sand layer underneath Preserved_Specimen creeping vine Lee, J. 14 Oahu BISH 1981-11-10
29 Ipomoea obscura Manoa Campus, Univ.Hawaii, Honolulu Preserved_Specimen Twining herb; 1.5 m. Flowers creamy white. Swarbrick, J.T. 4 Oahu BISH 1976-01-03
30 Ipomoea obscura Lawai Valley, P.T.B.G Preserved_Specimen vine with cream-colored to yellow flowers Herbst, D.R. 2329 Kauai BISH 1972-01-12
31 Ipomoea obscura Manoa Campus, Univ.Hawaii, Honolulu Preserved_Specimen cream-colored or pale yellow flowers with a purple throat. Abundant weedy vine. Herbst, D.R. 5079 Oahu BISH 1974-10-20
32 Ipomoea obscura Aiea Heights Preserved_Specimen Degener, O. 24356 Oahu BISH 1956-08-15
33 Ipomoea obscura Manoa, Honolulu Preserved_Specimen Fl. white with yellow pleats, usually trailing, weed St.John, H. 10457 Oahu BISH 1930-04-01
34 Ipomoea obscura Vacant lot, U.S. Army Reserve area, Pearl City Industrial Park Vacant lot Preserved_Specimen Corn, C. Oahu BISH 1986-06-23
35 Ipomoea obscura Hawaii County, US-HI, US UNKNOWN . Coordinates do not match to country in source data. Consortium of Pacific Northwest Herbaria Vladimir J. Krajina V180261 Maui HAPI 3/13/1962
36 Ipomoea obscura Coral Flats Preserved_Specimen corolla white, yellow bands, purple center Woolford, H.A. Oahu BISH 1957-06-29
37 Ipomoea obscura Coral Flats Preserved_Specimen Flowers white, small Woolford, H.A. Oahu BISH 1957-02-24
38 Ipomoea obscura Ewa, Pohakupuna Rd Preserved_Specimen flowers white, centers purple Woolford, H.A. Oahu BISH 1957-01-26
39 Ipomoea obscura Ewa, Pohakupuna Rd Preserved_Specimen flowers white, yellow centers Woolford, H.A. Oahu BISH 1957-02-10
40 Ipomoea obscura Aiea Heights Preserved_Specimen Degener, O. 24356 Oahu BISH 1956-08-15
41 Ipomoea obscura below Castle Hospital Preserved_Specimen Smith, L.B. 89 Oahu BISH 1976-03-27
42 Ipomoea obscura Manana Ridge Trail Lowland mesic forest UNKNOWN . Coordinates do not match to country in source data. Not found a country in reverser geocoding. Bioversity International C. R. Annable Oahu HAPI 9/23/1996
43 Ipomoea obscura Makiki Forestry Nursery Preserved_Specimen Corn, C. Oahu BISH 1978-01-27
44 Ipomoea obscura Lihue Preserved_Specimen Barnum, C.C. Kauai BISH 1935-03-30
45 Ipomoea obscura Makiki Forestry Nursery Preserved_Specimen Corn, C. Oahu BISH 1978-01-27
46 Ipomoea obscura Kapalama Hts., Kamehameha Girls' School Preserved_Specimen Neal, M.C. Oahu BISH 1932-06-06
47 Ipomoea obscura Kawaihau, Aliomanu abandoned pineapple fields Preserved_Specimen vine with off-white flowers Herbst, D.R. 5657 Kauai BISH 1976-02-23
48 Ipomoea obscura Kapalama Hts., Kamehameha Girls' School Preserved_Specimen Neal, M.C. Oahu BISH 1932-06-06
49 Ipomoea obscura Kamehameha Heights, Honolulu waste ground Preserved_Specimen fl. yellow Christophersen, E. 1633 Oahu BISH 1931-03-03
50 Ipomoea obscura Honolulu, Makiki, 1099 Green St Growing on fence. Preserved_Specimen Vine, corolla white, with fruit. Kennedy, B. 13 Oahu BISH 1995-11-21
51 Ipomoea obscura Koloa, Kalaheo, along Niho Road and Kaloke Road Secondary vegetation along roadside near cane field and houses. Preserved_Specimen Herbaceous vine growing over low herbs. Corolla white with dark purple spot in center Lorence, D.H. 5818 Kauai BISH 1988-02-21
52 Ipomoea obscura Hulopoe Occasional in waste areas. Preserved_Specimen Flowers open midday. Oppenheimer, H.L. 100641 Lanai BISH 2006-10-20
53 Ipomoea obscura Manoa roadside thicket Preserved_Specimen corolla uniform pale yellow; tube dark purple at base within, paler yellow without Priest, C. Oahu BISH 1930-03-30
54 Ipomoea obscura Kona, between Keauhou Bay and Mamalahoa Highway along highway Preserved_Specimen vine with cream-colored flowers Herbst, D.R. 5383 Hawaii BISH 1975-06-24
55 Ipomoea obscura Kamalo Roadside. Climbing alien vegetation. Preserved_Specimen Weed; flowers white. Oppenheimer, H.L. 110132 Molokai BISH 2001-11-18
56 Ipomoea obscura West slope of Ulupau Head along abandoned road; fairly common in thick Leucaena scrub Preserved_Specimen twiner, flowers cream-color with dark purple center Fosberg, F.R. 58852 Oahu BISH 1978-12-10
57 Ipomoea obscura Highway between Laie and Kahuku loam Preserved_Specimen stems creeping, twining; leaves heart-shaped, flowers white to cream colored Lee, P. 4 Oahu BISH 1975-02-08
58 Ipomoea obscura Koolau Range, Kaneohe, 47-285 Pulama Rd., Senator Fong's Plantation and Garden with Schefflera and Schinus; lowland mesic forest Preserved_Specimen vine; flowers white Annable, C.R. 3037 Oahu BISH 1996-09-23
59 Ipomoea obscura Waimanalo, jct. of Hihimanu and Kalanianaole Hwy., Azevedo Field roadside Preserved_Specimen Wagner, W.L. 4822 Oahu BISH 1983-06-04
60 Ipomoea obscura Central ditch on sugar cane field Preserved_Specimen fls. pale sulfur yellow, with purple-black base of throat. Iltis, H.H. 255 Oahu BISH 1967-07-04
61 Ipomoea obscura East Maui, Kaupo, along highway at Nuu trailing over Panicum maximum and climbing in Leucaena Preserved_Specimen Hobdy, R.W. 2335 Maui BISH 1985-04-09
62 Ipomoea obscura Laie, BYU-HC clay Preserved_Specimen flower creamy color; leaves cordate, stem creeping, rooting at node Wong, A. 4 Oahu BISH 1980-12-08
63 Ipomoea obscura Kipapa Gulch, Waipahu waste places near mouth of stream Preserved_Specimen Hosaka, E.Y. 1248 Oahu BISH 1933-12-17
64 Ipomoea obscura 1940 Manoa Road full sun Preserved_Specimen weed twining on shrubbery. Flowers white to cream, with a maroon center; odorless (morning) Lau, J. 2576 Oahu BISH 1986-06-26
65 Ipomoea obscura Honolulu, Kalihi St., near Bishop Museum waste lots Preserved_Specimen Hume, E.P. Oahu BISH 1931-06-03
66 Ipomoea obscura Hulu, Maui. On S side of island near coast on south side of island near coast Preserved_Specimen Rare to occasional. One patch on south side of island near coast which was pulled. Starr, F. 5040425 Maui BISH 2005-04-04
67 Ipomoea obscura Honolulu, Kalihi St. near Beckwith St Farrington High School fence Preserved_Specimen vine, fls. light-yellow, center purple Kelsey, T. Oahu BISH 1960-08-04
68 Ipomoea obscura Laie, BYU-HC kaolite clay with coral sand layer underneath Preserved_Specimen creeping vine Lee, J. 14 Oahu BISH 1981-11-10
69 Ipomoea obscura Manoa Campus, Univ.Hawaii, Honolulu Preserved_Specimen Twining herb; 1.5 m. Flowers creamy white. Swarbrick, J.T. 4 Oahu BISH 1976-01-03
70 Ipomoea obscura Lawai Valley, P.T.B.G Preserved_Specimen vine with cream-colored to yellow flowers Herbst, D.R. 2329 Kauai BISH 1972-01-12
71 Ipomoea obscura Manoa Campus, Univ.Hawaii, Honolulu Preserved_Specimen cream-colored or pale yellow flowers with a purple throat. Abundant weedy vine. Herbst, D.R. 5079 Oahu BISH 1974-10-20
72 Ipomoea obscura Aiea Heights Preserved_Specimen Degener, O. 24356 Oahu BISH 1956-08-15
73 Ipomoea obscura Manoa, Honolulu Preserved_Specimen Fl. white with yellow pleats, usually trailing, weed St.John, H. 10457 Oahu BISH 1930-04-01
74 Ipomoea obscura Vacant lot, U.S. Army Reserve area, Pearl City Industrial Park Vacant lot Preserved_Specimen Corn, C. Oahu BISH 1986-06-23
75 Ipomoea obscura Hawaii County, US-HI, US UNKNOWN . Coordinates do not match to country in source data. Consortium of Pacific Northwest Herbaria Vladimir J. Krajina V180261 Maui HAPI 3/13/1962
76 Ipomoea obscura Coral Flats Preserved_Specimen corolla white, yellow bands, purple center Woolford, H.A. Oahu BISH 1957-06-29
77 Ipomoea obscura Coral Flats Preserved_Specimen Flowers white, small Woolford, H.A. Oahu BISH 1957-02-24
78 Ipomoea obscura Ewa, Pohakupuna Rd Preserved_Specimen flowers white, centers purple Woolford, H.A. Oahu BISH 1957-01-26
79 Ipomoea obscura Ewa, Pohakupuna Rd Preserved_Specimen flowers white, yellow centers Woolford, H.A. Oahu BISH 1957-02-10
80 Ipomoea obscura Aiea Heights Preserved_Specimen Degener, O. 24356 Oahu BISH 1956-08-15
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