Flora of North America species comparison

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Aristolochia tomentosa

common Dutchman's pipe, pipevine, woolly Dutchman's pipe
Habit Lianas, twining, to 25 m, woody.
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.
Inflorescences

on new growth, axillary, solitary flowers;

peduncle not bracteolate, 1-7 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.
Capsule

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

valves 3;

septa entire, not attached to valves.
Seeds

flat, triangular, 1 × 1 cm.
2n

= 28.

Aristolochia tomentosa
Phenology Flowering late spring–summer.
Habitat Alluvial soils along rivers and streams
Elevation 0–500 m (0–1600 ft)
Distribution
from FNA
AL; AR; FL; GA; IL; IN; KS; KY; LA; MO; MS; NC; OK; TN; TX
[WildflowerSearch 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.
Parent taxa 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
Synonyms Isotrema tomentosa
Name authority Sims: Bot. Mag. 33: plate 1369. (1811)
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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