Carnegiea gigantea, Giant Saguaro

Southwest Desert Flora

Home to the plants of the Sonoran, Chihuahuan and Mojave Deserts

Cirsium ochrocentrum, Yellowspine Thistle

Mimosa roemeriana, Roemer's Mimosa

Roemer's Mimosa has pink or lavender, showy puff-ball type flowers. The “puff-ball” flowers each have several small individual flowers that have 5 petals and 8 to 10 protruding yellow or gold tipped stamen with pink filaments and yellow anthers. Mimosa roemerianaRoemer's Mimosa  blooms from April to July. It is also called Cat’s Claw, Catclaw, Pink Sensitive Briar, Roemer’s Sensitive Briar, Roemer’s Mimosa, Sensitive Briar, Sensitive Plant and Shame Vine. Mimosa roemerianaRoemer's Mimosa leaves are alternate and pinnately compound. The small leaflet pairs quickly fold back looking like the leaves are closing-up, and thus the common name “sensitive”. Mimosa roemerianaRoemer's Mimosa is a member of the Fabaceae or Leguminosae family of plants. It is native to Texas and perhaps Oklahoma. This species prefers elevations from 600 to 3,000 feet (182.88 to 914.4 m). Mimosa roemerianaRoemer's Mimosa may be observed in the following habitat preferences: Roadways, pastures, fields, prairies, rocky-areas, calcareous and chalky type soils, sandy soils. Mimosa roemeriana

Scientific Name: Mimosa roemeriana
Common Name: Roemer's Mimosa

Also Called: Cat’s Claw, Catclaw, Pink Sensitive Briar, Roemer’s Sensitive Briar, Roemer’s Mimosa, Sensitive Briar, Sensitive Plant, Shame Vine

Family: Fabaceae or Leguminosae Family

Synonyms: (Mimosa quadrivalvis var. platycarpa, Schrankia roemeriana)

Status: Native to Texas.

Duration: Perennial

Size: 1 to 2 feet (30.48 to 60.96 cm), may spread horizontally several feet (up to 6 feet (1.82 m).

Growth Form: Forb/herb, vining; plants low growing, trailing, prostrate, stems ribbed with numerous recurved painful prickles (thus the common name briar), branching, lower parts of stems rounded or 5-sided, young stems puberulent or sometimes glabrous, stems 12 to 40 inches (30.48 to 101.6 cm) long.

Leaves: Green; alternate, pinnately compound; when touched the leaflet pairs quickly fold back looking like the leaves are closing-up, thus the name "sensitive".

Flower Color: Pink or lavender, showy 1 inch (25 mm) puffball type flowers; flowers with fragrance; inflorescence from leaf axils, puffball "flower" with several small individual flowers containing 5 petals and 8 to 10 extending yellow or gold tipped stamens with pink filaments and yellow anther; fruit flattened pods at maturity 3 to 6 times as wide as thick, seed pods also with prickles, seeds almost square, smooth.

Flowering Season: April to July

Elevation: 600 to 3,000 feet (182.88 to 914.4 m)

Habitat Preferences: Roadways, pastures, fields, prairies, rocky-areas, calcareous and chalky type soils, sandy soils.

Recorded Range: Mimosa roemeriana is found primarily in North Central Texas and on the Edwards Plateau, where it is common and wide-spread. Possibly native also to Oklahoma.

North America & US County Distribution Map for Mimosa roemeriana.

U.S. Weed Information: Not considered a weed as such but regarded as an important lawn pest in Galveston County, Texas which can quickly become a major problem without quick preventative measures.

Invasive/Noxious Weed Information: No information available.
Wetland Indicator: No information available.
Threatened/Endangered Information: No information available.

Genus Information: In North America there are 22 species for Mimosa. Most native Mimosa are found in Texas. Worldwide, The Plant List includes 708 accepted species names and a further 344 scientific names of infra-specific rank for the genus.
The genus Mimosa is closely related to Acacia and Albizia, the differences are Mimosa flowers are reported to have 10 or fewer stamen per flower.

In the Southwestern United States: Arizona has 5 species of genus Mimosa, California has 0 species, Nevada has 1 species, New Mexico has 6 species, Texas has 17 species, Utah has 1 species. All data approximate and subject to revision.

Comments: Roemer's Mimosa is also called, among other common names, "sensitive briar" because its leaves close-up quickly when touched. Members of the genus Mimosa are among the few plants that are capable of this fast, rapid movement.

Also see in Southwest Desert Flora; Catclaw Mimosa, Mimosa aculeaticarpa biuncifera and Velvetpod Mimosa, Mimosa dysocarpa.

Special Value to Native Bees, Butterflies, Birds and Insects
The genus Mimosa is a known host to butterflies and moths of both the Pieridae (Whites and Sulphurs) and Galacticidae (Galacticid Moths) families: - Find out more from Butterflies and Moths of North America.

Etymology:
The genus Mimosa is from the Greek word "mimos", an actor or mime and the suffix "osa" meaning resembling", a reference to rapidly closing leaves which appears to "mimic" conscious life.
The species epithet roemeriana is named in honor of Ferdinand von Roemer, a German geologist who lived in Texas from 1845 to 1847 and became known as the "father of Texas geology". Mr. Roemer collected specimens in the New Braunfels, Texas, area from 1845-47.

Ethnobotany
No information available.

Date Profile Completed:11/04/2019
References:
U.S. Dept. of Agriculture, Natural Resources Conservation Service on-line database and USGS ITIS search - (accessed 10/09/2019)
https://plants.usda.gov/java/stateSearch
The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 11/02/2019).
http://www.theplantlist.org/1.1/browse/A/Leguminosae/Mimosa/
Marian Kimbrough, Master Gardener, Article, 2009; Weed of the Month (July 2009); Roemer's Sensitive Briar; Galveston County Master Gardener Association, Inc. (GCMGA); (accessed 11/03/2019).
https://aggie-horticulture.tamu.edu/galveston/Weeds/Weed-ID-134-Roemer's-Sensitive-Briar.htm
Botanical Research Institute of Texas; Flora of North Central Texas Online' Shinners and Mahler's Illustrated Flora of North Central Texas (accessed 11/04/2019).
https://www.brit.org/brit-press/nctexasflora
Tom Lebsack, Texas Wildbuds, 2019, (accessed 11/04/2019).
http://www.texaswildbuds.com/flower-database/redpink/mimosa-species/
Wikipedia contributors, 'Mimosa', Wikipedia, The Free Encyclopedia, 11 May 2019, 19:28 UTC,
https://en.wikipedia.org/w/index.php?title=Mimosa&oldid=896618660 [accessed 3 November 2019]
Native Plant Information Network, NPIN (2013). Published on the Internet http://www.wildflower.org/plants/ (accessed 11/02/2019). Lady Bird Johnson Wildflower Center at The University of Texas, Austin, TX.
https://www.wildflower.org/plants/result.php?id_plant=miro6
SEINet synonyms, scientific names, geographic locations, general information, (accessed 11/02/2019).
http://swbiodiversity.org/seinet/
ETYMOLOGY: Michael L. Charters; California Plant Names: Latin and Greek Meanings and Derivations; A Dictionary of Botanical and Biographical Etymology; (accessed 11/03/2019)
http://www.calflora.net/botanicalnames/pageR.html