Al Schneider's Rocky Mountains Plant Descriptions

Orange Agoseris
Agoseris aurantiaca
Aster family (Asteraceae)

Orange Agoseris is the only orange-flowered Agoseris. The flower resembles the common dandelion in general form. Orange Agoseris also resembles Orange Hawkweed (Hieracium aurantiacum), an exotic alien distinguished by its multiple flowerheads per stem. Also known as "devil's paintbrush," it is an introduced species that prefers disturbed soils. "Agoseris" is Greek for "goat Chicory."


©2010 Keir Morse

Description

, 4-24" tall, with solitary leafless stems and milky sap. Each stem is topped by an orange (rarely yellow) flower consisting of only , which often turn pink-purple with age. Outer tips of are squared with 5 small . Narrow, leaves are in a . Leaves are long- with smooth-edged margins or with scattered or small . are smooth with long, slender beaks and of clustered white hairs.

Field Marks

Single orange dandelion-like flower.

© Al Schneider

ray flowers -- The outer petals of a sunflower or daisy are ray flowers.

A perennial plant lives and blooms for many years.

lobe -- A rounded parts of a leaf (or other organ).

A herb is a plant whose stems die back to the ground in the winter.

ray flowers -- The outer petals of a sunflower or daisy are ray flowers.

pappus -- Small scales, bristles or hairs at the top of the seed in Asteraceae. For example, dandelion parachutes. Plural: pappi.

basal -- at the base, situated or attached at the base.

achene -- a type of simple dry fruit produced by many species of flowering plants. For example, a rose hip holds a few achenes.

Like the teeth on a saw, leaves and other surfaces can have toothed edges.

fruit -- any seed-bearing structure in flowering plants. It is formed from the ovary after flowering.

stalk -- The supporting structure of an organ. Examples of stalks are stem, peduncle, petiole, ...

lanceolate -- Lance-shaped. Long, wider in the middle.

rosette -- usually a dense cluster of leaves at the base of a plant.