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common Dutchman's pipe, pipevine, woolly Dutchman's pipe

Cory's Dutchman's-pipe

Habit Lianas, twining, to 25 m, woody. Herbs, procumbent, to 0.4 m. Young stem smooth, glabrous or 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, 3-5 × 3-5 cm, base cordate, sinus depth 1-2 cm, apex acute;

surfaces abaxially puberulent;

venation palmate.

Inflorescences

on new growth, axillary, solitary flowers;

peduncle not bracteolate, 1-7 cm.

on new growth, axillary, solitary flowers;

peduncle bracteolate, 1-4 cm;

bracteoles lanceolate, to 5 mm.

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-green or yellow-brown, curved;

utricle horizontal, ovoid to obconic, 0.8 × 0.6 cm;

syrinx present, funnel-shaped, 1-2 mm;

tube curved, cylindric, 1-3 × 0.3 cm;

annulus absent;

limb brown with purple spots, 1-lobed, lobe strap-shaped, 1.5-2 × 1.5 cm, glabrous;

gynostemium 5-lobed, crown-shaped, 1-4 mm;

anthers 5;

ovary 5-locular, 1-4 cm.

Capsule

ellipsoid to cylindric, 6-8 × 4-6 cm, dehiscence basipetal;

valves 3;

septa entire, not attached to valves.

globose, 1.2 × 1-3 cm, dehiscence basipetal;

valves 5;

septa entire, not attached to valves.

Seeds

flat, triangular, 1 × 1 cm.

flat, triangular, 0.5 × 0.6 cm.

2n

= 28.

Aristolochia tomentosa

Aristolochia coryi

Phenology Flowering late spring–summer. Flowering late spring–summer.
Habitat Alluvial soils along rivers and streams Rocky slopes, especially on limestone, occasionally river bottoms
Elevation 0–500 m (0–1600 ft) 0–600 m (0–2000 ft)
Distribution
from FNA
AL; AR; FL; GA; IL; IN; KS; KY; LA; MO; MS; NC; OK; TN; TX
[WildflowerSearch map]
from FNA
TX; Mexico
[BONAP county map]
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.)

Source FNA vol. 3. FNA vol. 3.
Parent taxa Aristolochiaceae > Aristolochia Aristolochiaceae > Aristolochia
Sibling taxa
A. californica, A. clematitis, A. coryi, A. erecta, A. macrophylla, A. maxima, A. pentandra, A. reticulata, A. serpentaria, A. watsonii, A. wrightii
A. californica, A. clematitis, A. erecta, A. macrophylla, A. maxima, A. pentandra, A. reticulata, A. serpentaria, A. tomentosa, A. watsonii, A. wrightii
Synonyms Isotrema tomentosa
Name authority Sims: Bot. Mag. 33: plate 1369. (1811) I. M. Johnston: J. Arnold Arbor. 21: 256. (1940)
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