Aristolochia clematitis

Linnaeus

Sp. Pl.2: 962. 1753

Common names: Birthwort aristoloche clématite asarabacca
Introduced
Treatment appears in FNA Volume 3.
Herbs, erect, to 1 m. Young stem ribbed, glabrous to puberulent. Leaves: petiole 4-7 cm. Leaf 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, fascicles or solitary flowers; peduncle not bracteolate, 1-4 cm. Flowers: 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 ± globose, 3 × 2-3 cm, dehiscence basipetal; valves 6; septa entire, not attached to valves. Seeds flat, triangular, 1 × 1.2 cm.

Phenology: Flowering summer.
Habitat: Waste places, roadsides, ballast
Elevation: 0-100 m

Distribution

V3 1005-distribution-map.gif

Ont., Que., Md., Mass., N.Y., Ohio, Pa., Europe.

Discussion

Aristolochia clematitis is occasionally cultivated, sometimes escapes, and probably does not persist.

References

None.

Lower Taxa

No lower taxa listed.

AuthorKerry Barringer + and Alan T. Whittemore +
AuthorityLinnaeus +
Common nameBirthwort +, aristoloche clématite + and asarabacca +
DistributionOnt. +, Que. +, Md. +, Mass. +, N.Y. +, Ohio +, Pa. + and Europe. +
Elevation0-100 m +
HabitatWaste places, roadsides, ballast +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
Introducedtrue +
PhenologyFlowering summer. +
Publication titleSp. Pl. +
Publication year1753 +
ReferenceNone +
Source xmlhttps://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V3/V3 1005.xml +
Special statusIntroduced +
SynonymsEndodeca +, Isotrema + and Siphisia +
Taxon familyAristolochiaceae +
Taxon nameAristolochia clematitis +
Taxon parentAristolochia +
Taxon rankspecies +
VolumeVolume 3 +