Krigia occidentalis

Nuttall

J. Acad. Nat. Sci. Philadelphia 7: 104. 1834.

Common names: Western dwarfdandelion
Endemic
Synonyms: Cymbia occidentalis (Nuttall) Standley
Treatment appears in FNA Volume 19. Treatment on page 365. Mentioned on page 364, 366.

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 ovatelanceolate 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. 2n = 12.


Phenology: Flowering Mar–Jun.
Habitat: Sandy or clay soils, meadows, prairies, edges of open oak-hickory and pine woods
Elevation: 10–400 m

Distribution

V19-582-distribution-map.gif

Ark., Ga., Kans., La., Mo., Okla., Tex.

Discussion

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.

Selected References

None.

Lower Taxa

None.

"fine" is not a number.

... more about "Krigia occidentalis"
reduced +
scarious +
ovate +  and lanceolate +
paniculiform +  and corymbiform +
indeterminate +  and determinate +
Kenton L. Chambers +  and Robert J. O’Kennon +
Nuttall +
decurrent +
compound +  and simple +
obovate;oblanceolate;obovate;oblanceolate;linear +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
tuberculate +, rugose +, muricate +  and smooth +
filiform +
Western dwarfdandelion +
zygomorphic +, actinomorphic +  and (3-)5-merous +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
reddish-brown +
Ark. +, Ga. +, Kans. +, La. +, Mo. +, Okla. +  and Tex. +
10–400 m +
winged +  and beaked +
dispersed +
Sandy or clay soils, meadows, prairies, edges of open oak-hickory and pine woods +
indeterminate +
each +  and sessile +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
turbinate;campanulate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
cauline +  and basal +
triangular +  and rounded +
lobed +  and entire +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
2-carpellate +
persistent +
Flowering Mar–Jun. +
connate +  and distinct +
subequal +  and unequal +
J. Acad. Nat. Sci. Philadelphia +
low-convex;flat +
10 +  and 20 +
brownish;yellowish +
exalbuminous +
1 +  and 20 +
scapiform +
appendaged +  and truncate +
papillate +
Cymbia occidentalis +
Krigia occidentalis +
species +
globose +
4 cm40 mm <br />0.04 m <br /> (16 cm160 mm <br />0.16 m <br />) +
shrub +  and subshrub +
9] +, [6 +  and 5 +