small logoThe Friends of the Wild Flower Garden, Inc.

Plants of the Eloise Butler Wildflower Garden

The oldest public wildflower garden in the United States

Thumbnail

Common Name
Golden Ragwort (Heart-leaved Groundsel, Golden Groundsel, Squaw weed, Life root)

 

Scientific Name
Packera aurea (L.) A. Löve & D. Löve

 

Plant Family
Aster (Asteraceae)

Garden Location
Woodland

 

Prime Season
Late Spring Flowering

 

 

Ragworts have small flower heads on long stalks appearing in a branched terminal cluster. Golden Ragwort is an erect native perennial. The flower stem can be from 6 to 30 inches high, and is usually hairless and a dark purple color at the top.

Leaves: Golden Ragwort has a rosette of long-stalked basal leaves that are bluntly rounded with wavy lightly indented to crenate margins, heart shaped at the base and longer than wide, often with a purplish color on the stalk. The stem leaves are alternate, lyrate to lance shaped with 2 to 4 pairs of lobes, with long stalks, and become progressively shorter, and then on the uppers they are without stalks (sessile), but not clasping.

The floral array is a somewhat flat-topped branched cluster of 6 to 20+ flower heads with each head stalked.

Flowers: The flower head consist of 55 to 70+ bisexual disc florets with golden colored corolla tubes that are 3 to 3.5 mm long, surrounded by 8 to 13 shiny yellow pistillate ray florets whose laminae are 8 to 10+ mm long and which are slightly reflexed; in all the flower head is 1/2 to 1.3 inches wide, slightly wider than long with the involucre cylindric. Both types of flower are fertile. The styles of the disc florets branch. The phyllaries around the outside of the flower head number 13 to 21, are green with purple or black pointed tips. The calyculi (bract-like structures) are inconspicuous but there are very small bracts at the base of the cluster.

Seed: The cypselae (dry achene like seeds), without hair, 1 to 1.5 mm long, with fluffy white pappus for wind distribution. Seeds are very small and need light plus at least 60 days of cold stratification for germination.

 

Habitat: Golden Ragwort grows from rhizomes in moist conditions of marshes and in moist woods and meadows in full sun to light shade. Full sun requires most conditions.

Names: In older reference works Golden Ragwort was classified as Senecio aureus. The genus Packera is now considered a segregate of Senecio. The name Packera is an honorary for Canadian plant systematist and contributor to Flora of North America, John Packer. The species aurea is Latin for "golden". The author names for the plant classification are: First to classify was '(L.)' which refers to Carl Linnaeus (1707-1778), Swedish botanist and the developer of the binomial nomenclature of modern taxonomy. His work was updated by 'A. Löve & D. Löve' which refers to Áskell Löve (1916-1994) Icelandic botanist, cofounder of the Flora-Europaea project and professor at various universities in North America and Doris Löve (1918-2000), Swedish systematic botanist, active in the Arctic and collaborator with Áskell Löve on numerous publications. The older common names containing the word 'groundsel', according to Mrs. Grieve (Ref.#7) go back to Anglo-Saxon times and were derived from groundeswelge which ment 'ground-swallower' which referred to the rapid way in which some plants of the genus Senecio could spread.

Comparisons: Another similar ragwort is Prairie Ragwort, Packera plattensis, where the flowers are more yellow and the stems and leaves have hair. Read Eloise Butler's notes below.

See bottom of page for notes on the Garden's planting history, distribution in Minnesota and North America, lore and other references.

Golden Ragwort Drawing

Above: The floral array is a branched cluster of stalked flower heads. Note the much reduced upper stem leaf. Drawing ©USDA-NRCS Plants Database.

Below: 1st photo - The outer ray florets surround a flattish central disc of numerous disc florets. 2nd photo - The phyllaries of the flower head are green with spreading purple tips.

Golden Ragwort Golden Ragwort phyllaries

Below: 1st photo - A basal leaf. 2nd photo - The flower clusters have very small purple tipped bracts at the base of the cluster.

Basal Leaf Golden Ragwort flower cluster stems

Below: Two views of the lower stem leaves, which are stalked with 2 to 4 pairs of lateral lobes. These are much reduced toward the top of the stem as seen in the photo above.

stem leaf stem leaf

Notes:

Notes: Golden Ragwart is listed on Eloise Butler's tally of indigenous plants of the Garden area. She first noted it in bloom on June 3, 1908. Martha Crone noted planting in in June 1945 and in 1946, '48, and '50. She listed it on her 1951 Garden census. It is native to many counties in Minnesota, principally in the northern 2/3rds of the state and in SE corner. In North America it is found in the eastern half of the continent. It is one of six species of Packera in the state and is one of the three most common along with P. plattensis (Prairie Ragwort) and P. paupercula (Balsam Ragwort).

Eloise Butler wrote: "In the meadows may also be seen an early composite, the Golden Ragwort (Packera aurea L.). In the composite family what seems to be a flower, at a careless glance, is in reality a flower cluster, composed of small closely crowded flowers, with buds or tubular flowers in the center that might be mistaken for stamens and pistils, and surrounded on the outside by whorls of green leaves called bracts that exactly imitate a calyx. The foliage of the ragwort is more or less cut or parted, hence the name." Published May 28, 1911, Sunday Minneapolis Tribune.

Medicinal Lore: There is literature on the use of the flowers and the root for medicinal purposes. A tincture of the fresh flower was used for many ailments. The root in powdered form made into a liquid extract was used to treat women's gynecological disorders and also for treating consumption. Details in Hutchins (Ref. #12) and Grieve (Ref. #7). The active principles are Pyrrolizidine alkaloids.

References and site links

References: Plant characteristics are generally from sources 1A, 32, W2, W3, W7 & W8 plus others as specifically applied. Distribution principally from W1, W2 and 28C. Planting history generally from 1, 4 & 4a. Other sources by specific reference. See Reference List for details.

©2013

040617