Krigia biflora (Walter) S.F.Blake

Twoflower dwarfdandelion (en)

Species

Angiosperms > Asterales > Asteraceae > Krigia

Characteristics

Perennials, 10–70 cm; caudices stout, fibrous-rooted (sometimes propagating by adventitious buds on roots). Stems 1–5+, erect, scapiform, eglandular or glandular-villous distally. Leaves mostly basal (rosettes), some cauline (proximal); petioles ± winged; blades oblance-olate to obovate or spatulate, 5–25 cm, margins entire or remotely dentate to pinnately lobed, lobes narrow to bluntly triangular or rounded, apices acute to obtuse or rounded, faces glabrous. eglandular (usually glaucous); cauline 1–4, sessile, lanceolate, bases sheathing or auriculate-clasping, usually entire, distalmost sometimes reduced, bractlike. Heads (2–)3–20+. Peduncles usually in groups of 2–6 from axils of single or paired distal cauline bracts. Involucres 7–11 mm. Phyllaries 8–18, reflexed in fruit. lanceolate, midveins obscure, apices acute, faces glabrous. Florets 25–60; corollas orange or yellow-orange, 15–25 mm. Cypselae reddish brown, columnar, 2–2.5 mm, 12–15-ribbed; pappi of ca. 10 outer scales 0.3–0.5 mm plus 20–40, barbellulate inner bristles 4.5–5.5 mm. 2n = 10, 20.
More
Fibrous-rooted perennial 2–8 dm from a short caudex, glabrous except generally under the heads, somewhat glaucous; basal lvs oblanceolate to broadly elliptic, mostly 4–25 cm (petiole included) × 1–5 cm, entire or toothed, or sometimes pinnatifid below but with a large, broad terminal segment; cauline lvs few, sessile and clasping, often much reduced, the uppermost often subopposite and with several long peduncles in their common axil; heads several; invol 7–14 mm, much surpassed by the orange fls; bracts 9–18, narrow, reflexed in age; pappus of 20–35 very fragile, unequal bristles and ca 10 inconspicuous hyaline scales less than 0.5 mm; 2n=10. Woods, roadsides, and fields; Mass. to Ga., w. to Man., Colo., and Ariz. May–Oct. (K. amplexicaulis)
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.7
Root system adventitious-root fibrous-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 84
Germination temperacture (C°) -5 - 3
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Leaf

Krigia biflora leaf picture by Josh Murray (cc-by-sa)
Krigia biflora leaf picture by Charles Labedz (cc-by-sa)

Flower

Krigia biflora flower picture by Otto (cc-by-sa)
Krigia biflora flower picture by Audrey R (cc-by-sa)

Distribution

Krigia biflora world distribution map, present in Canada and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:133926-2
WFO ID wfo-0000064460
COL ID 6NNWN
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Krigia biflora f. biflora Hyoseris amplexicaulis Krigia biflora Krigia amplexicaulis Tragopogon virginicus Hyoseris prenanthoides Hyoseris biflora Cynthia falcata Hyoseris minor Troximon virginicum Cynthia amplexicaulis Cynthia viridis Cynthia virginica Troximon virginicum Cynthia virginica Adopogon virginicus Troximon virginicum Cynthia griffithii Krigia virginica Adopogon amplexicaule Krigia biflora subsp. biflora Adopogon virginicum var. virginicum Krigia biflora var. viridis Krigia biflora var. biflora Luthera virginica