Flora of North America species comparison

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Ipomoea nil

Ipomoea tenuiloba

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

spiderleaf
Habit Annuals. Perennials, root tuberlike.
Stems

twining.

usually trailing, sometimes twining near tips.
Leaf

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

blades orbiculate, palmatisect, lobes 5–9, lanceolate to linear, 10–70 × 0.5–6.5 mm, surfaces glabrous.
Peduncles

hairy, hairs retrorse.

glabrous.
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.

nocturnal;

sepals chartaceous or coriaceous, outers oblong-lanceolate, 5–12 × 2–3 mm, muricate along midrib or ± smooth, margins scarious, apex mucronate, inners obovate-acuminate, 8–9 × 3–4 mm, smooth, margins scarious;

corolla white, limb sometimes purple or pale rose-red, funnelform or salverform, 35–100 mm, limb 30–36 mm diam.
2n

= 30.

Ipomoea nil

Ipomoea tenuiloba
Phenology Flowering Jul–Dec.
Habitat Abandoned plantings, fields, thickets.
Elevation 10–2200 m. (0–7200 ft.)
Distribution
from FNA
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]
from USDA
sw United States; sc United States; n Mexico
[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.)

Varieties 2 (2 in the flora).

The two varieties of Ipomoea tenuiloba are comparatively easy to distinguish; there are intergrades (G. Yatskievych and C. T. Mason 1984), some approaching I. plummerae.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Leaf blade lobes 5–7, each to 1.2 mm wide; corollas usually white, limb sometimes pink to lavender, salverform, 65–100 mm; filaments: free portions 8–11 mm.
var. tenuiloba
1. Leaf blade lobes 7–9, each to 6.5 mm wide; corollas: tube white, limb purple to red, fun­nelform, 35–65 mm; filaments: free portions 14–19 mm.
var. lemmonii
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. tenuissima, I. ternifolia, I. thurberi, I. tricolor, I. triloba, I. violacea, I. wrightii, I. ×leucantha
Subordinate taxa
I. tenuiloba var. lemmonii, I. tenuiloba var. tenuiloba
Synonyms Convolvulus nil, Pharbitis hederacea, P. nil
Name authority (Linnaeus) Roth: Catal. Bot. 1: 36. (1797) Torrey in W. H. Emory: Rep. U.S. Mex. Bound. 2(1): 148. (1859)
Web links 
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).



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