Western Dwarfdandelion

Krigia occidentalis grows in the Eastern deciduous forest biome, tallgrass prairie, and mixedgrass prairie. It has superficial similarity in pappus form to K. virginica; it was consistently placed as the sister species to K. cespitosa in chloroplast cpDNA and nuclear rDNA studies by K. J. Kim et al. (1992b, 1992c). In morphology, it is most similar to the polyploid species K. wrightii, with 2n = 18.

Annuals, 4–16 cm; taprooted. Stems 1–20+, ± scapiform, erect, eglandular or lightly glandular-villous . Leaves basal (rosettes) and proximally cauline (on scarcely elongated branches close to ground); petiolate (petioles sometimes ciliate-glandular); blades linear, oblanceolate, or obovate, 1–7 cm, margins entire or sparingly lobed, lobes linear or triangular to rounded. apices acute or obtuse, faces eglandular. Heads borne singly. Peduncles from basal rosettes. Involucres 2.5–6.5 mm. Phyllaries 4–7, erect in fruit, lanceolate in flower, becoming ovate-lanceolate in fruit, midveins and sometimes secondary veins becoming prominent in fruit, curving inward at bases to form keels, apices acute . Florets 5–25; corollas yellow, 5–9 mm. Cypselae reddish brown, broadly obconic, 1.2–1.8 mm (apical areas broader than basal areoles). 10–15-ribbed; pappi of 5, hyaline, rounded outer scales 0.4–0.6 mm plus usually 5, sometimes 0, scabrous inner bristles 1.2–2 mm. 2. = 12.

Cymbia occidentalis (Nuttall) Standley

Krigia occidentalis, known as western dwarfdandelion, is a North American species of plants in the family Asteraceae. It is native to the southern Great Plains and the Ozark Mountains of the south-central United States (Kansas, Missouri, Arkansas, Oklahoma, Texas, Louisiana).

Krigia occidentalis is a small annual herb, rarely more than 16 cm (6.4 inches) tall, with a taproot. The plant produces only one flower head per flower stalk, each head with 5–25 yellow ray flowers but no disc flowers.