font settings and languages

Font Size: Large | Normal | Small
Font Face: Verdana | Geneva | Georgia
Languages:

Aristolochia serpentaria

(Black Snakeroot)

Interesting Facts

[ Back to top ]

Common Names

[ Back to top ]

Click on the language to view common names.

Common Names in English:

Black Snakeroot, Snakeroot, Virginia Dutchmanspipe, Virginia Serpentary, Virginia Snakeroot

Common Names in Russian:

Zmejnyj Koren, змейный корен

Description

[ Back to top ]

Family Aristolochiaceae

Herbs, shrubs , rarely lianas, subshrubs , or trees ; root , stems, and leaves with oil cells . Leaves alternate; stipules absent; petiole usually present and well defined; leaf blade simple , usually pinnately veined, sometimes palmately 3-5-veined, margin usually entire, rarely 3-5-lobed. Inflorescences terminal or axillary , racemes , cymes, or corymbs, or flowers solitary. Flowers bisexual , zygomorphic or actinomorphic . Perianth usually with 1 petaloid whorl (in Saruma with 2 whorls: outer one sepaloid , inner one petaloid), mostly connate into distinct tube , cylindric to campanulate or subglobose; limb rotate, urceolate , cylindric, or ligulate , 1-3-lobed; lobes valvate . Stamens 6-12 (in China), in 1 or 2 series; filaments adnate to ovary (in Asarum) or style column (in Thottea) with anthers free , or filaments and anthers fully adnate to style column to form gynostemium (in Aristolochia) ; anthers 2-loculed, dehiscence longitudinal . Ovary inferior to superior, 6-loculed (in Thottea 4-loculed) ; carpels connate only at base or fully fused; ovules numerous , anatropous , usually in 1 or 2 series; placentation parietal . Styles free or connate, column 3- or 6-lobed (in Thottea 5-20-lobed) . Fruit a fleshy or dry capsule, rarely siliquiform or follicular . Seeds many; testa somewhat hard or crustaceous ; endosperm copious , fleshy; embryo minute.

About eight genera and 450 600 species: primarily in tropical and subtropical regions; four genera (one endemic) and 86 species (69 endemic) in China.[1]

Genus Aristolochia

Herbs or lianas, perennial . Stems erect , twining , or procumbent . Leaves alternate, 2-ranked (evident on young growth, becoming obscure with age in some species) ; true stipules absent; pseudostipules absent [present]; petiole sometimes very short. Leaf blade membranous to leathery. Inflorescences on new growth or on older stems, axillary , racemes or solitary flowers; bracts present. Flowers: calyx usually mixture of purple, brown, green, or red, bilaterally symmetric , tubular , usually bent or curved , 1- or 3-lobed, not fleshy , base with utricle (basal, inflated portion of calyx surrounding or containing gynostemium ) ; tube narrowed, sometimes extended proximally as cylindric syrinx (tubular or ringlike structure at juncture of tube and utricle, projecting into utricle cavity) and distally as annulus (circular flange at juncture of tube and limb) on limb; corolla absent; stamens 5-6, adnate to styles and stigmas, forming gynostemium; ovary inferior, 3-, 5-, or 6-locular; styles 3, 5, or 6, connate in column. Capsule dry, dehiscent . Seeds flattened or rounded , sometimes winged . x = 6, 7, 8.

Species ca. 300: nearly worldwide.

Most European and tropical species of Aristolochia are believed to be pollinated by small flies attracted to the flowers by the fetid odors and purple-brown color. Flies enter the flower when the stigmas are receptive and are trapped until after the anthers dehisce (H. Solereder 1889, 1889b). No formal studies of pollination of the North American species have been reported.

Many species of Aristolochia have been used in the treatment of snakebite; the treatment may or may not be effective. All species contain aristolochic acid , which is variously reported as tumor-causing or tumor-inhibiting (J. A. Duke 1985).

The leaves of many species are eaten by pipe-vine swallowtail butterflies. The larvae eat leaves of these species and sequester aristolochic acid in their bodies, making them unpalatable to birds (W. H. Howe 1975).[2]

Physical Description

Species Aristolochia serpentaria

Herbs, erect to decumbent , to 0.6 m. Young stem ridged , glabrous to hispid . Leaves: petiole 0.5-3.5 cm. Leaf blade lanceolate to ovate , 5-15 × 1-5 cm, base truncate to cordate, sinus depth 0-1.5 cm, apex acute to acuminate; surfaces abaxially glabrous or hispid; venation pinnate. Inflorescences from base of stem, an additional flower in axil of stem leaf, racemes ; peduncle bracteolate , to 1.5 cm; bracteoles lanceolate, to 3 mm. Flowers: calyx brown-purple, bent; utricle pendent, pear-shaped to ovoid , 0.5-5 cm; syrinx present, ringlike, 1 mm, oblique ; tube bent, cylindric , 1 cm; annulus smooth ; limb purplish brown, 3-lobed, lobes 0.5 × 0.5 cm, glabrous; gynostemium 3-lobed, globose to crown-shaped, 1.5 mm; anthers 6; ovary 3-locular, to 1.5 cm. Capsule globose, 0.8-2 × 1-2 cm, dehiscence basipetal; valves 6; septa absent. Seeds rounded , ovate, 0.5 × 0.4 cm. 2 n = 28. [source]

Habit: Forb/herb

Flowers: Bloom Period: April, May, June. • Flower Color: maroon

Size/Age/Growth

Size: 6-12" tall.

Habitat

Mesic forests ; 50-1300 m [3].

Typically found at an altitude of 0 to 1,092 meters (0 to 3,583 feet).[4]

Biology

[ Back to top ]

Reproduction

Duration: Perennial

Growth

Culture: Space 9-12" apart.

Soil: Minimum pH: 5.6 • Maximum pH: 7.8

Sunlight: Sun Exposure: Sun to Partial Shade.

Temperature: Cold Hardiness: 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b. (map)

Taxonomy

[ Back to top ]

Synonyms

A. hastata Nuttall • A. nashii Kearney • A. serpentaria var. hastata (Nuttall) Duchartre • Aristolochia convolvulacea Small • Aristolochia hastata Nutt. • Aristolochia nashii Kearney • Aristolochia serpentaria var. hastata (Nutt.) Duchartre • Aristolochia serpentaria var. nashii (Kearney) Ahles • Endodeca serpentaria (L.) Raf. • Endodeca serpentaria var. hastata (Nutt.) C. F. Reed • Pistolochia Serpentaria

Notes

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

[ Back to top ]

Members of the genus Aristolochia

ZipcodeZoo has pages for 40 species, subspecies, varieties, forms, and cultivars in this genus:

A. anguicida (Harlequin Dutchman's Pipe) · A. baetica (Birthwort) · A. bilabiata (West Indian Dutchman's Pipe) · A. bilobata (Twolobe Dutchman's Pipe) · A. brasiliensis (Aristolochia) · A. californica (California Dutchman's Pipe) · A. chilensis (Oreja De Zorro) · A. clematitis (Birthwort) · A. contorta (Dutchmans Pipe) · A. cordifolia (Heartleaf Dutchman's Pipe) · A. coryi (Cory's Dutchman's Pipe) · A. cymbifera (Mil-Homens) · A. elegans (Calico Flower) · A. erecta (Dutchman's Pipe) · A. fimbriata (White Veined Dutchmans Pipe) · A. gigantea (Calico Flower) · A. gigantea 'Brasiliensis' (Dutchmans Pipe) · A. grandiflora (Calico Flower) · A. indica (Indian Birthwort) · A. labiata (Mottled Dutchman's Pipe) · A. leuconeura (Aristolochia) · A. littoralis (Calico Flower) · A. macrophylla (Broadleafed Birthwort) · A. manshuriensis (Birthwort) · A. maxima (Florida Dutchman's Pipe) · A. odoratissima (Fragrant Dutchman's Pipe) · A. pearcei (Scrambling Dutchmans Pipe) · A. peltata (Peltate Dutchman's Pipe) · A. pentandra (Marsh's Dutchman's Pipe) · A. peruviana (Aristolochia) · A. pilosa (Pipevine) · A. reticulata (Texas Dutchman's Pipe) · A. ringens (Dutchman's Pipe) · A. sempervirens (Dutchmans Pipe) · A. serpentaria (Black Snakeroot) · A. tomentosa (Common Dutchmanspipe) · A. trilobata (Bejuco De Santiago) · A. watsonii (Indian Root) · A. wrightii (Wright's Dutchman's Pipe) · A. 'Guimaraes' (Dutchmans Pipe)

More Info

[ Back to top ]

Further Reading

[ Back to top ]

Notes

[ Back to top ]

Contributors

Data Sources

Accessed through GBIF Data Portal November 16, 2007:

Identifiers

Footnotes

  1. Liguo Fu, Nan Li & Robert R. Mill "Aristolochiaceae". in Flora of China Vol. 5 Page 246. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. Kerry Barringer "Aristolochia". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
  3. "Aristolochia serpentaria". in Flora of North America Vol. 3. Oxford University Press. Online at EFloras.org. [back]
  4. Mean = 197.840 meters (649.081 feet), Standard Deviation = 163.400 based on 704 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012