Alvaradoa

Liebmann

Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 1853: 100. 1854.

Etymology: For Pedro de Alvarado y Contreras, ca. 1485 – 1541, member of Cortez’s expedition to Mexico
Treatment appears in FNA Volume 9. Treatment on page 4. Mentioned on page 3.

Shrubs or trees, 10–70 [–150] dm. Leaves imparipinnate (mimosoid in appearance); leaflets [14–] 17–35 [–40], alternate, elliptic, 8–33 × 3–9 mm, base rounded to oblique. Inflorescences lateral to subterminal, racemes. Flowers: sepals 5; petals 5 or 0; stamens 5, anthers dorsifixed with enlarged connective, thecae parallel; pistils 3-carpellate, 2 lateral carpels sterile, central fertile, in staminate flowers pistils vestigial. Fruits samaras, flattened or recurved, usually hairy; sepals not persistent. Seeds 1, ellipsoid, ± 1/4–1/3 length of samara. x = 8.

Distribution

Fla., Mexico, West Indies, Central America, South America (Argentina), South America (Bolivia)

Discussion

Species 6 (1 in the flora).

A chromosome count for Alvaradoa subovata Cronquist of Argentina is 2n = 16 (A. M. Sanso and M. N. Seo 2005). The samara is derived from a dry, indehiscent capsule; the wings are formed from the two lateral, sterile carpels.

Selected References

None.

"/4lengthofsamara" is not declared as a valid unit of measurement for this property.

... more about "Alvaradoa"
dorsifixed +
W. Wayt Thomas +
Liebmann +
rounded;oblique +
Fla. +, Mexico +, West Indies +, Central America +, South America (Argentina) +  and South America (Bolivia) +
For Pedro de Alvarado y Contreras, ca. 1485 – 1541, member of Cortez’s expedition to Mexico +
pistillate +  and staminate +
lateral +  and subterminal +
fertile +  and sterile +
imparipinnate +
persistent +
0.8 cm8 mm <br />0.008 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
3 +  and 2 +
distinct +
Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn +
not arillate +
ellipsoid +
not persistent +
distinct +  and connate +
antipetalous +
persistent +
Alvaradoa +
Picramniaceae +
tree +  and shrub +