monomerous

from The Century Dictionary.

• In zoology, having the tarsi single-jointed; uniarticulate, as a tarsus; specifically, of or pertaining to the Monomera.
• In botany, having but one member in each cycle (pistil, stamen, petal, or sepal): said of a flower. Compare dimerous, 2.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Bot.) Composed of solitary parts, as a flower with one sepal, one petal, one stamen, and one pistil.
• adjective (Zoöl.) Having but one joint; -- said of the foot of certain insects.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective botany Composed of solitary parts, as a flower with one sepal, one petal, one stamen, and one pistil.
• adjective zoology Having only one joint; said of the foot of certain insects.