Bupleurum americanum J.M.Coult. & Rose

국표에 없다.

Common name:

American thorow wax

Family:

Carrot (Apiaceae)

Scientific name:

Bupleurum americanum

Main flower color:

Yellow

Range:

The northern Rocky Mountains, plus small areas of Colorado, Oregon and New Mexico

Height:

Up to 20 inches

Habitat:

Rocky places, grassy hillsides, meadows; 4,000 to 12,000 feet

Leaves:

Linear or narrowly lanceolate, undivided, up to 5 inches long and less than half an inch wide

Season:

June to September

Bupleurum americanum is the only native US species of this small genus, and has a limited distribution, generally restricted to the northern Rocky Mountains, but also found in the San Juan Mountains of southwestern Colorado, and Lincoln county, New Mexico. Unusually for a plant in the apiaceae family, the leaves are simple, and undivided, growing mostly around the base. Stems and leaves are grey-green in color (glaucous), and hairless. Stems grow vertically upwards, or at an angle.

Flowers form at the tip of the stems, and also from the upper leaf nodes; a compound umbel of between 4 and 14 umbellets, with rays up to 2 inches long. Individual clusters are compact, and hemispherical, typically containing 10 to 20 tiny yellow flowers. A whorl of 2 to 6 light green, ovate, differently-sized bracts subtends each cluster, and also the base of the umbel. Flowers become reddish as they wither.

Western USA wildflowers: American Thorow Wax, Bupleurum Americanum (americansouthwest.net)

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