FNA: Ipomoea nil vs. Ipomoea tenuissima

	Ipomoea nil	Ipomoea tenuissima
	ivy morning glory, Japanese morning glory, whiteedge morning-glory	rockland morning-glory
Habit	Annuals.	Annuals.
Stems	twining.	twining.
Leaf	blades cordate, ± orbiculate, ovate, or 3-lobed, 50–150 × 20–140 mm overall, base cordate, surfaces sparsely hirsute to sericeous.	blades usually narrowly hastate or sagittate, sometimes ovate, 15–30 × 7–20 mm, base cordate, hastate, or sagittate, lobes usually pointed, sometimes rounded, surfaces usually ± hairy, adaxial sometimes glabrate.
Peduncles	hairy, hairs retrorse.	hairy, hairs appressed.
Flowers	sepals lance-linear, 15–25(–30) mm, herbaceous, proximally narrowly ovate, densely hispid, gradually narrowed to ± straight, hispid to strigose or glabrate distal portion longer than ovate base; corolla usually blue to purplish, sometimes red or white, tube white or yellow inside, funnelform, (20–)30–60+ mm.	sepals lance-oblong, lanceolate, or lance-ovate, 5–8 mm, chartaceous or coriaceous, margins ciliate, apex acuminate, mucronate; corolla lavender, pink, or pink-purple, throat darker inside, funnelform, 30–45 mm.
2n	= 30.

	Ipomoea nil	Ipomoea tenuissima
Phenology	Flowering Jul–Dec.	Flowering Aug–Sep.
Habitat	Abandoned plantings, fields, thickets.	Pine flatwoods.
Elevation	10–2200 m. (0–7200 ft.)	0–30 m. (0–100 ft.)
Distribution	AL; KY; LA; MD; MS; NC; OK; SC; TN; TX; Mexico; Central America; South America; West Indies [Introduced in North America; introduced also in Asia] [WildflowerSearch map] [BONAP county map]	FL [BONAP county map]
Discussion	Reports of Ipomoea nil from California are based on misidentified material of I. hederacea. (Discussion copyrighted by Flora of North America; reprinted with permission.)	After fires, Ipomoea tenuissima seeds germinate and seedlings thrive for about a year. The plants then disappear except in sites that remain open. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 14.	FNA vol. 14.
Parent taxa	Convolvulaceae > Ipomoea	Convolvulaceae > Ipomoea
Sibling taxa	I. alba, I. amnicola, I. aquatica, I. asarifolia, I. barbatisepala, I. batatas, I. cairica, I. capillacea, I. cardiophylla, I. carnea, I. coccinea, I. cordatotriloba, I. costellata, I. cristulata, I. dumetorum, I. hederacea, I. hederifolia, I. imperati, I. indica, I. lacunosa, I. leptophylla, I. lindheimeri, I. longifolia, I. macrorhiza, I. microdactyla, I. muricata, I. pandurata, I. pes-caprae, I. plummerae, I. pubescens, I. purpurea, I. quamoclit, I. rupicola, I. sagittata, I. setosa, I. shumardiana, I. sloteri, I. tenuiloba, I. tenuissima, I. ternifolia, I. thurberi, I. tricolor, I. triloba, I. violacea, I. wrightii, I. ×leucantha	I. alba, I. amnicola, I. aquatica, I. asarifolia, I. barbatisepala, I. batatas, I. cairica, I. capillacea, I. cardiophylla, I. carnea, I. coccinea, I. cordatotriloba, I. costellata, I. cristulata, I. dumetorum, I. hederacea, I. hederifolia, I. imperati, I. indica, I. lacunosa, I. leptophylla, I. lindheimeri, I. longifolia, I. macrorhiza, I. microdactyla, I. muricata, I. nil, I. pandurata, I. pes-caprae, I. plummerae, I. pubescens, I. purpurea, I. quamoclit, I. rupicola, I. sagittata, I. setosa, I. shumardiana, I. sloteri, I. tenuiloba, I. ternifolia, I. thurberi, I. tricolor, I. triloba, I. violacea, I. wrightii, I. ×leucantha
Synonyms	Convolvulus nil, Pharbitis hederacea, P. nil
Name authority	(Linnaeus) Roth: Catal. Bot. 1: 36. (1797)	Choisy in A. P. de Candolle and A. L. P. P. de Candolle: Prodr. 9: 376. (1845)
Web links	Local Web sites: LA Plants, MD Biodiversity WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Ipomoea tenuissima

ivy morning glory, Japanese morning glory, whiteedge morning-glory

rockland morning-glory

Habit

Annuals.

Stems

twining.

Leaf

blades cordate, ± orbiculate, ovate, or 3-lobed, 50–150 × 20–140 mm overall, base cordate, surfaces sparsely hirsute to sericeous.

blades usually narrowly hastate or sagittate, sometimes ovate, 15–30 × 7–20 mm, base cordate, hastate, or sagittate, lobes usually pointed, sometimes rounded, surfaces usually ± hairy, adaxial sometimes glabrate.

Peduncles

hairy, hairs retrorse.

hairy, hairs appressed.

Flowers

sepals lance-linear, 15–25(–30) mm, herbaceous, proximally narrowly ovate, densely hispid, gradually narrowed to ± straight, hispid to strigose or glabrate distal portion longer than ovate base;

corolla usually blue to purplish, sometimes red or white, tube white or yellow inside, funnelform, (20–)30–60+ mm.

sepals lance-oblong, lanceolate, or lance-ovate, 5–8 mm, chartaceous or coriaceous, margins ciliate, apex acuminate, mucronate;

corolla lavender, pink, or pink-purple, throat darker inside, funnelform, 30–45 mm.

= 30.

Ipomoea nil

Ipomoea tenuissima

Phenology

Flowering Jul–Dec.

Flowering Aug–Sep.

Habitat

Abandoned plantings, fields, thickets.

Pine flatwoods.

Elevation

10–2200 m. (0–7200 ft.)

0–30 m. (0–100 ft.)

Distribution

AL; KY; LA; MD; MS; NC; OK; SC; TN; TX; Mexico; Central America; South America; West Indies [Introduced in North America; introduced also in Asia]

[WildflowerSearch map]

[BONAP county map]

Discussion

Reports of Ipomoea nil from California are based on misidentified material of I. hederacea.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

After fires, Ipomoea tenuissima seeds germinate and seedlings thrive for about a year. The plants then disappear except in sites that remain open.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source

FNA vol. 14.

Parent taxa

Convolvulaceae > Ipomoea

Sibling taxa

I. alba, I. amnicola, I. aquatica, I. asarifolia, I. barbatisepala, I. batatas, I. cairica, I. capillacea, I. cardiophylla, I. carnea, I. coccinea, I. cordatotriloba, I. costellata, I. cristulata, I. dumetorum, I. hederacea, I. hederifolia, I. imperati, I. indica, I. lacunosa, I. leptophylla, I. lindheimeri, I. longifolia, I. macrorhiza, I. microdactyla, I. muricata, I. pandurata, I. pes-caprae, I. plummerae, I. pubescens, I. purpurea, I. quamoclit, I. rupicola, I. sagittata, I. setosa, I. shumardiana, I. sloteri, I. tenuiloba, I. tenuissima, I. ternifolia, I. thurberi, I. tricolor, I. triloba, I. violacea, I. wrightii, I. ×leucantha

I. alba, I. amnicola, I. aquatica, I. asarifolia, I. barbatisepala, I. batatas, I. cairica, I. capillacea, I. cardiophylla, I. carnea, I. coccinea, I. cordatotriloba, I. costellata, I. cristulata, I. dumetorum, I. hederacea, I. hederifolia, I. imperati, I. indica, I. lacunosa, I. leptophylla, I. lindheimeri, I. longifolia, I. macrorhiza, I. microdactyla, I. muricata, I. nil, I. pandurata, I. pes-caprae, I. plummerae, I. pubescens, I. purpurea, I. quamoclit, I. rupicola, I. sagittata, I. setosa, I. shumardiana, I. sloteri, I. tenuiloba, I. ternifolia, I. thurberi, I. tricolor, I. triloba, I. violacea, I. wrightii, I. ×leucantha

Synonyms

Convolvulus nil, Pharbitis hederacea, P. nil

Name authority

(Linnaeus) Roth: Catal. Bot. 1: 36. (1797)

Choisy in A. P. de Candolle and A. L. P. P. de Candolle: Prodr. 9: 376. (1845)

Web links

Local Web sites: LA Plants, MD Biodiversity
WildflowerSearch
iNaturalist (observations)
USDA Plants Database
LBJ Wildflower Center
SEINet
Plants of the World Online
Encyclopedia of Life
Wikipedia
Google Image Search

Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).

Choose a data source: Flora of North America

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Flora of North America species comparison

Ipomoea nil

Ipomoea tenuissima

Ipomoea nil

Ipomoea tenuissima