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Published In: Genera Plantarum 2: 532–533. 1791. (Gen. Pl.) Name publication detail
 

Project Name Data (Last Modified On 8/11/2017)
Acceptance : Accepted
Project Data     (Last Modified On 8/10/2009)

 

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38. Krigia Schreb. (dwarf dandelion)

Plants annual or perennial herbs, taprooted or fibrous-rooted (producing tubers in K. dandelion). Latex white. Stems erect or ascending, sometimes loosely ascending from a spreading base, finely ridged, glabrous or hairy. Leaves all basal or basal and alternate, glabrous or hairy, sessile or short- to long-petiolate. Leaf blades entire or pinnately lobed, linear to lanceolate, ovate, or oblong-ovate in outline, the margins entire or with widely spaced, broadly triangular, spreading teeth, with 1 main vein visible and sometimes also a faint network of anastomosing secondary veins. Inflorescences of solitary flowers at the stem or branch tips or open terminal clusters, rarely appearing as small panicles in K. biflora. Involucre not or only slightly becoming elongated as the fruits mature, cup-shaped or somewhat bell-shaped, the bracts in 1 or 2 series, all similar in size and shape (no shorter, outer bracts present), narrowly lanceolate to oblong-ovate, often purplish-tinged, the margins sometimes thin and pale, the tip ascending at flowering. Receptacle naked, usually minutely pitted at the base of each floret. Ligulate florets 6–60 per head. Corollas yellow to orange. Pappus of 5 to numerous bristles and/or 5 or (8–)10 scales or absent. Fruits variously shaped, not flattened, sometimes 5-angled in cross-section, often somewhat oblique at the base, with 10–20 fine, longitudinal nerves or ridges, usually also finely cross-wrinkled, glabrous, reddish brown to dark brown, not beaked, the pappus attached to a sometimes slightly expanded tip. Seven species, U.S. and adjacent Canada, Mexico.

 

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1 1. Involucral bracts 4–7(–9), lanceolate to ovate or oblong-ovate, persistently scalelike and remaining ascending with age (sometimes eventually withering in place); pappus absent or with the longest bristles 1–2 mm long

2 2. Leaves basal and alternate along the stems; pappus absent ... 2. K. CESPITOSA

Krigia cespitosa
3 2. Leaves all basal; pappus present, of 5 short bristles alternating with 5 shorter scales ... 4. K. OCCIDENTALIS

Krigia occidentalis
4 1. Involucral bracts 8–16, narrowly lanceolate to oblong-lanceolate, shriveling and becoming strongly reflexed with age; pappus with the longest bristles 4–8 mm long

5 3. Involucre 4–7 mm long; pappus of 5 bristles alternating with 5 shorter scales; plants annual ... 5. K. VIRGINICA

Krigia virginica
6 3. Involucre 7–15 mm long; pappus of 20–45 bristles and 10(–15) short, inconspicuous scales; plants perennial

7 4. Stems with at least 1 leaf above the base, few-branched toward the tip; corollas yellowish orange to orange; plants not producing tubers ... 1. K. BIFLORA

Krigia biflora
8 4. Leaves all basal, the stems usually unbranched; corollas lemon yellow to orangish yellow; plants producing small, globose to oblong-ovoid tubers ... 3. K. DANDELION Krigia dandelion
 
 
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