Jeffersonia

Barton

Trans. Amer. Philos. Soc. 3: 342, plate 1. 1793.

Etymology: Named for Thomas Jefferson (1743-1826), third president of the United States
Treatment appears in FNA Volume 3.
 TaxonIllustrator 
FNA03 P53 Jeffersonia Akebia Calycocarpum pg 292.jpegJeffersonia diphylla
Akebia quinata
Calycocarpum lyonii
John Myers
John Myers
John Myers

Herbs, perennial, deciduous, 1-4 dm, glabrous. Rhizomes short, producing 4-8 or more leaves per year. Aerial stems absent. Leaves alternate, 2-foliolate; petiole long, slender. Leaf-blade reniform-orbiculate in overall outline, 1.5-18 cm, leaflet margins entire to shallowly lobed; venation palmate. Inflorescences terminal, solitary flowers borne on scapes. Flowers 4-merous, 15-30 mm; bracteoles absent; sepals caducous, (3-) 4 (-5), petaloid; petals 8, white [lavender]; stamens 8; anthers dehiscing by 2 apically hinged flaps; pollen exine striate; ovaries obovoid; placentation marginal; style central. Fruits capsulelike, brownish, obovoid, with transverse or oblique dehiscence, top forming reflexed lid. Seeds 10-25, red; aril white, not enclosing seed. x = 6.

Distribution

e North America and e Asia

Discussion

Species 2 (1 in the flora).

Selected References

None.

... more about "Jeffersonia"
Lisa O'Rourke George +
Barton +
1.5 cm15 mm <br />0.015 m <br /> (18 cm180 mm <br />0.18 m <br />) +
reniform-orbiculate +
e North America and e Asia +
small +  and large +
Named for Thomas Jefferson (1743-1826), third president of the United States +
showy +  and inconspicuous +
1.5 cm15 mm <br />0.015 m <br /> (?) +  and 3 cm30 mm <br />0.03 m <br /> (?) +
obovoid +  and capsule-like +
axillary +  and terminal +
2-foliolate +
1-carpellate +
basal +  and superior +
obovoid +
3-merous +  and 2-merous +
distinct +
Trans. Amer. Philos. Soc. +
10 +  and 25 +
distinct +
elongating +
palmate +  and pinnate +
persistent +
Jeffersonia +
Berberidaceae +
deciduous +  and perennial +