Twiggy Wreath Plant

Stephanomeria spp.

purple flower on twig branches
Twiggy wreath plant (Stephanomeria spp.) is easily dismissed as a dead weed. By the time flowers appear in summer, most of the leaves have shriveled and dropped, giving the plant the appearance of a skeleton lightly dusted with confetti flowers. The flowers, however, deserve a closer look. They are composite flowers (related to daisies) but have only ray florets, lacking the disk florets that give daisies their central “eye”. They look like a garden pink or a delicate sort of carnation. Walking through a “forest” of twiggy wreath plants in bloom is magical.
At present, there are two similar species of wreath plant listed as occurring in the Reserve. However, the taxonomy is being examined and it is possible that we may have more species, fewer species, or different species than we now think.
Other Common Names:

wreath plant

Description 2,11,23,59

Twiggy wreath plants are branching, green-stemmed, annual plants, usually less than 6 feet (2.5 m) tall.
A basal rosette of leaves disappears before flowering. These leaves are elongate, less than 7 inches (18 cm) in length and irregularly incised along the margins. Cauline leaves are progressively smaller and simpler and are usually withered by flowering time.
Numerous white to lavender flower heads occur on the terminal portions of the branches. Flower heads are less than ¾ inch (2 cm) across and consist of 6-18 ray florets, which are toothed across the end and may be striped with a darker shade; disk florets are absent. Floret color is often deeper underneath. Flower heads resemble pinks or carnations (to which they are not related) rather than daisies (to which they are). Flowers bloom in late summer through fall, July – January.1
The stamens are mostly purple; united in a tube around the pistil, which extends 1-2 mm beyond them. Together, both appear as a white tube with a broad purple band. The striped petals of the opening flower buds give them the appearance of mint candies stuck along the stem. Flowers open in the morning.
Seeds are small tapered 5-sided cylinders, less than 1/8 inch (3 mm) long, sculpted with ridges and bumps. They are wind-distributed by means of a terminal cluster of feathery white bristles (the pappus) that are slightly longer than the seeds.
purple flower
dried twig branches
light purple flower close up

Distribution 5,7,8

Twiggy wreath plants are a wide-spread group of species, native to western North America and found throughout California. They occur below 7,000 feet (2,000 m) in disturbed areas in several vegetation types, including coastal sage scrub, chaparral, and coastal strand.

In the Reserve, they are commonly found along the trails and in openings in the coastal sage scrub and revegetated areas along the Pole Road.

Classification 2,11,34,143

Twiggy wreath plant is a name given to a group of species that are dicot angiosperms in the sunflower family, Asteraceae. This is the largest family of vascular plants in the Northern Hemisphere. “Flowers” of Asteraceae are made up of one or both of two types of flowers (florets): symmetrical disk florets and strapped-shaped ray florets. These are crowded onto a common base (receptacle) and together are often assumed to be a single flower, which is called a flower head.44,49 
Other familiar Asteraceae that occur in the Reserve include California sagebrush (Artemisia californica), bush sunflower (Encelia californica), and goldenbush (Isocoma menziesii).
Species of Stephanomeria have only ray florets; they lack the disk florets that form the “eye” of the daisy.
Three species of Stephanomeria have been reported from the Reserve: S. exigua, S. diegensis, and S. virgata spp. pleurocarpa.48 At present, there is uncertainty about the validity of these species.42 A recent Jepson states “Annual species complexly interrelated, distinguished by different combinations or expressions of same traits.”  Thus, it is possible that the Reserve may have more species, fewer species, or different species than we now think. We will leave the solution this puzzle to the experts and here discuss our plants together as one.
Jepson eFlora Taxon Page
light purple flowers
purple flower bulbs
dry, twig branched plant

Ecology

Twiggy wreath plant blooms during the driest time of the year. The loss of leaves before flowering is seen in other sage scrub plants, such as deerweed (Acmispon glaber) and sand aster (Corethrogyne filaginfolia) and is presumed to be a strategy to reduce water loss during the dry period.

twig branches with small purple flowers
close up of flower seed
twig branches tangled in bush

Human Uses 16

The Kumeyaay dried the whole twiggy wreath plant for future medicinal use. A tea from the roots would get rid of intestinal worms. The Spanish used the whole plant in a tea to clean the stomach after a hangover.

twig bush on side of trail
small purple flowers
small purple flower

Interesting Facts

The origin of the common name, twiggy wreath plant, comes partly from the Latin genus name Stephanomeria, which in turn comes from the Greek: “stephane”, meaning wreath and “meros” meaning division.21 While the adjective “twiggy” is appropriate, the relationship of this plant to a wreath is a mystery.23

purple flower on dried out twig branch
bush with purple flowers on top
small purple flowers

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