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7. Ipomoea tenuiloba Torrey in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 148. 1859.
Spiderleaf
Perennials, root tuberlike. Stems usually trailing, sometimes twining near tips. Leaf blades orbiculate, palmatisect, lobes 5–9, lanceolate to linear, 10–70 × 0.5–6.5 mm, surfaces glabrous. Peduncles glabrous. Flowers 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.
Varieties 2 (2 in the flora): sc, sw United States, n Mexico. 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.
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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 |
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7a Ipomoea tenuiloba var. tenuiloba |
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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 |
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7b Ipomoea tenuiloba var. lemmonii |
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Lower Taxa
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