Aristolochia tomentosa |
Aristolochia clematitis |
|
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common Dutchman's pipe, pipevine, woolly Dutchman's pipe |
aristoloche clématite, asarabacca, birthwort, creeping birthwort |
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Habit | Lianas, twining, to 25 m, woody. | Herbs, erect, to 1 m. Young stem ribbed, glabrous to puberulent. |
Young stem | ribbed, tomentose. |
|
Leaves | blade ovate to reniform, 9-20 × 8-15 cm, base cordate, sinus depth 1-2 cm, apex obtuse to acute; surfaces abaxially tomentose; venation palmate-pinnate. |
blade deltate to reniform, 4-6 × 5-6.5 cm, base cordate, sinus depth 1-2 cm, apex obtuse to rounded; surfaces abaxially glabrous; venation palmate. |
Inflorescences | on new growth, axillary, solitary flowers; peduncle not bracteolate, 1-7 cm. |
on new growth, axillary, fascicles or solitary flowers; peduncle not bracteolate, 1-4 cm. |
Flowers | calyx yellow-green, sharply bent; utricle pendent, globose to cylindric, 0.5-1 × 0.5-0.8 cm; syrinx absent; tube bent, cylindric, 1-3 × 0.5 cm; annulus rugulose; limb yellow, 3-lobed, lobes triangular, 2 × 2 cm, glabrous; gynostemium 3-lobed, globose, 3 mm; anthers 6; ovary 6-locular, 1-7 cm. |
calyx yellow-brown, curved; utricle angled upward, ovoid to globose, 0.5 × 0.2-0.3 cm; syrinx absent; tube curved upward, cylindric, 1-3 × 0.2-0.3 cm; annulus absent; limb purple, 1-lobed, lobe funnel-shaped, 1-6 cm, pilose; gynostemium 3-lobed, globose, 1-4 mm; anthers 6; ovary 6-locular, 1-4 cm. |
Capsule | ellipsoid to cylindric, 6-8 × 4-6 cm, dehiscence basipetal; valves 3; septa entire, not attached to valves. |
± globose, 3 × 2-3 cm, dehiscence basipetal; valves 6; septa entire, not attached to valves. |
Seeds | flat, triangular, 1 × 1 cm. |
flat, triangular, 1 × 1.2 cm. |
2n | = 28. |
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Aristolochia tomentosa |
Aristolochia clematitis |
|
Phenology | Flowering late spring–summer. | Flowering summer. |
Habitat | Alluvial soils along rivers and streams | Waste places, roadsides, ballast |
Elevation | 0–500 m (0–1600 ft) | 0-100 m (0-300 ft) |
Distribution |
AL; AR; FL; GA; IL; IN; KS; KY; LA; MO; MS; NC; OK; TN; TX
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MA; MD; NY; OH; PA; ON; QC; Europe [Introduced in North America] |
Discussion | Aristolochia tomentosa has escaped from cultivation in various places, including Virginia; this is not documented. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Aristolochia clematitis is occasionally cultivated, sometimes escapes, and probably does not persist. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Aristolochiaceae > Aristolochia | Aristolochiaceae > Aristolochia |
Sibling taxa | ||
Synonyms | Isotrema tomentosa | |
Name authority | Sims: Bot. Mag. 33: plate 1369. (1811) | Linnaeus: Sp. Pl. 2: 962. (1753) |
Web links |