Home Flora of Missouri
Home
Name Search
Families
Volumes
Hieracium caespitosum Dumort. Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: Florula belgica, opera majoris prodromus, auctore ... 62. 1827. (Fl. Belg.) Name publication detail
 

Project Name Data (Last Modified On 8/11/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

Export To PDF Export To Word

1. Hieracium caespitosum Dumort. (yellow king-devil)

Map 1067

Plants with short to long, spreading rhizomes and also usually with stolons, thus frequently forming colonies. Stems solitary or few to several, 25–100 cm long, moderately to densely pubescent toward the base with light orangish brown, spreading to loosely ascending hairs 2–4 mm long having a bulbous or slightly expanded base, these becoming sparse or absent toward the tip, also inconspicuously pubescent with minute, branched hairs, especially toward the tip, also with moderate to dense, dark-colored, gland-tipped hairs toward the tip. Basal leaves persistent at flowering, sessile or with a short, indistinct, winged petiole, the blade 4–25 cm long, narrowly oblanceolate, sharply pointed at the tip, the surfaces and margins pubescent with moderate to dense, spreading, bulbous-based hairs (these often relatively dark-colored) and sparse to moderate, minute, branched hairs. Stem leaves only 1 or 2 toward the stem base, similar to but shorter than the basal leaves, mostly sessile, narrowly oblanceolate to linear, the base not clasping the stem. Inflorescences mostly short, spreading panicles, sometimes reduced to a loose or dense terminal cluster of few to several heads. Involucre 6–9 mm long, the inner series of bracts narrowly oblong-elliptic, pubescent with spreading, dark-colored, gland-tipped hairs and usually also inconspicuous, minute, cobwebby, branched hairs, the outer series variable and grading into the inner series, some of the bracts more than 1/2 as long as those of the inner series. Ligulate florets 25–70. Corollas 8–14 mm long, bright yellow. Pappus bristles 4–6 mm long, white. Fruits 1.5–2.0 mm long, more or less cylindrical, not tapered at the tip. 2n=18, 27, 36, 45. June–September.

Introduced, known thus far only from Franklin County (native of Europe, introduced widely in the eastern and northwestern U.S., Canada). Open, grassy areas.

This species was first collected in 1993 by Jane Stevens (now curator of insects at the St. Louis Zoo) in a meadow at the Shaw Nature Reserve (then known as the Shaw Arboretum) in Gray Summit, where it had not been planted and was well naturalized. Efforts to control it have since been undertaken.

 
 


 

 
 
© 2024 Missouri Botanical Garden - 4344 Shaw Boulevard - Saint Louis, Missouri 63110