Amphiachyris dracunculoides (DC.) Nutt.
PRAIRIE BROOMWEED
  Dicotyledoneae   Asteraceae   Amphiachyris


IDnature guide
Names
Scientific source:

Supported by
Associates · map
FamilyScientific name @ source (records)
Alcyoniidae  Rhytisma solidaginis @ BPI (1)
Apidae  Nomada asteris @ BBSL (1)

Nomada placida @ BBSL (1)
Coleosporiaceae  Coleosporium delicatulum @ BPI (1)

Coleosporium solidaginis @ BPI (1)
Dothioraceae  Metasphaeria @ BPI (1)

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Amphiachyris dracunculoides (DC.) T.&G.

Broom Snakeroot

Gutierrezia dracunculoides plant

Family - Asteraceae

Habit - Taprooted annual, sometimes with slightly woody base.

Stems - To 60 cm tall, erect, branched, herbaceous, typically single from the base and simple in the basal 1/2-2/3. Lower stem appearing woody, 3-5 mm in diameter, grayish-brown. Stems in inflorescence divaricate, glabrous, green, angled or grooved.

Gutierrezia dracunculoides lower stem Lower stem.

Gutierrezia dracunculoides upper stem Upper stem.

Leaves - Mostly absent at anthesis. Leaves of the inflorescence linear, sessile, with punctate dots (use lens to see) and minute serrulate teeth on the leaf margins (use lens to see), +/-1 mm broad, to 6cm long.

Inflorescence - Many small flower heads terminating each branch of the inflorescence. Stems spreading to +/-50cm broad at anthesis in a "mound" shape. Each flower head subtended by linear bracts giving way to the involucre.

Gutierrezia dracunculoides inflorescence

Involucre - 2-3 mm broad, 2-3 mm tall, essentially biseriate. Lower series with green phyllaries. Phyllaries glabrous, linear-lanceolate, 2 mm long, 1 mm broad, acute. Inner series of phyllaries yellow-green (translucent at the base), glabrous, 3 mm long, 1.5-1.8 mm broad at the apex, acute, with the apical 1/4 spreading outward.

Gutierrezia dracunculoides involucre

Ray flowers - +/-8 per flower head, spreading, pistillate and fertile. Ligule yellow, 3-4 mm long, 2 mm broad, elliptic-oblong, glabrous, with 2 impressed veins above (expressed below). Corolla tube 1-1.5 mm long, whitish, glabrous. Style slightly exserted and bifurcate, whitish, .5-.6 mm long, glabrous. Stigmas 1 mm long, yellow, glabrous. Pappus absent or a minute, translucent crown.

Disk flowers - Disk +/-3 mm broad, with +/-15 flowers. Flowers staminate. Corolla tube translucent-yellow, glabrous, 3 mm long, 5-lobed. Lobes spreading, yellow, acute, +/-.5 mm long, glabrous. Stamens 5, adnate at the base of the corolla tube. Filaments translucent, .7 mm long. Anthers yellow, connivent around the undivided style, 1 mm long, partially exserted. Style +2 mm long, translucent in the basal 2/3, with the apical 1/3 pubescent and yellowish and exserted. Receptacle flat, naked but with ridges around the flower bases. Pappus a translucent awned crown. Awns equaling or exceeding the corolla. Crown (undivided portion) short, .3-.5 mm long.

Gutierrezia dracunculoides flower

Fruits - Achenes 1.5-2.2 mm long, oblong-obovoid, sometimes slightly flattened, with 7-9 fine, green nerves, the surface otherwise densely pubescent with short, white hairs, purplish brown to nearly black.

Flowering - July - October.

Habitat - Upland prairies, limestone and dolomite glades, bluff tops, riverbanks, fallow fields, disturbed sites, roadsides, railroads.

Origin - Native to U.S.

Other info. - This attractive little species can be found in the southwest corner of Missouri. Although it is not seen in the plant photo above, the plant nearly always grows from a single trunk-like base and then branches widely in the upper half (the whole plant being as wide or wider than tall). This species grows in profusion along roadsides in parts of the Great Plains and is quite common there. It is far less abundant in Missouri.

A synonym is Gutierrezia dracunculoides (DC.) S.F. Blake

Photographs taken at Tall Grass Prairie National Preserve, KS., 9-18-06.


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You are here: Home / Plant Profile

Amphiachyris dracunculoides (DC.) Nutt.
prairie broomweed

Image of Amphiachyris dracunculoides

General Information
Symbol: AMDR
Group: Dicot
Family: Asteraceae
Duration: Annual
Growth Habit : Forb/herb
Native Status : L48   N
Data Source and Documentation
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Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Amphiachyris thumbnails at the Plants Gallery

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United States, MO, Kansas City. Usage Requirements .

©Robin R. Buckallew. United States, OK, Edmond. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 370. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

slideshow

Synonyms

Symbol Scientific Name
BRDR Brachyris dracunculoides DC.
GUDR2 Gutierrezia dracunculoides (DC.) S.F. Blake
XADR Xanthocephalum dracunculoides (DC.) Shinners

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Amphiachyris (A. DC.) Nutt. – broomweed
Species Amphiachyris dracunculoides (DC.) Nutt. – prairie broomweed

Subordinate Taxa

This plant has no children

Legal Status

Wetland Status

Interpreting Wetland Status

Related Links

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ARS Germplasm Resources Information Network (AMDR)
Integrated Taxonomic Information System (AMDR)
Integrated Taxonomic Information System (BRDR)
Integrated Taxonomic Information System (GUDR2)
Integrated Taxonomic Information System (XADR)
Lady Bird Johnson Wildflower Center Native Plant Information Network (AMDR)
Native American Ethnobotany (University of Michigan - Dearborn) (AMDR)
University of Tennessee Herbarium (Distribution) (AMDR)
Related Websites
IL-Weeds of the North Central States (GUDR2)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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Following modified from Flora of North America
   
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FNA | Family List | FNA Vol. 20 | Asteraceae | Amphiachyris

2. Amphiachyris dracunculoides (de Candolle) Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 313. 1840.

Prairie broomweed

Brachyris dracunculoides de Candolle, Mém. Soc. Phys. Genève 7: 265. 1836; Gutierrezia dracunculoides (de Candolle) S. F. Blake; Xanthocephalum amoenum Shinners var. intermedium Shinners

Plants 30—100(—200) cm. Primary stems 0.3—1(—2) mm diam. Leaf blades narrowly to broadly lanceolate, 5—60 × 0.5—6 mm. Heads in crowded corymbiform arrays. Phyllaries 2—3 × 1—2 mm. Receptacles deeply pitted, glabrous. Cypselae 1.2—2.2 mm, 7—9-ribbed, short-setulose. 2 n = 10 (rarely 8).

Flowering Jul—Nov. Calcareous, clay, or sandy soils, disturbed habitats; 0—500 m; Ala., Ark., Ill., Ind., Iowa, Kans., Ky., La., Miss., Mo., Nebr., N.Mex., Okla., Ohio, Pa., S.C., Tenn., Va.

Amphiachyris dracunculoides is common in the south-central states, often in relatively large populations.

Following modified from CalPhotos
   
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Amphiachyris+dracunculoides&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Amphiachyris+dracunculoides&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 22
Query: SELECT * FROM img WHERE ready=1 and taxon like "Amphiachyris dracunculoides%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Field Goldeneye
ID: 0000 0000 0914 2068 [detail]
© 2014 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Field Goldeneye
ID: 0000 0000 0914 2073 [detail]
© 2014 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Field Goldeneye
ID: 0000 0000 0914 2074 [detail]
© 2014 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1014 1412 [detail]
© 2014 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1014 1413 [detail]
© 2014 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1014 1414 [detail]
© 2014 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0001 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0002 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0003 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0004 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0005 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0006 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0007 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1015 0008 [detail]
© 2015 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1016 3267 [detail]
© 2016 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 1016 3268 [detail]
© 2016 Richard Spellenberg

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 0119 2291 [detail]
© 2019 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 0119 2290 [detail]
© 2019 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 0119 1900 [detail]
© 2019 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 0119 1906 [detail]
© 2019 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 0119 1905 [detail]
© 2019 Wynn Anderson

Amphiachyris dracunculoides
Amphiachyris dracunculoides
Prairie Broomweed
ID: 0000 0000 0119 1907 [detail]
© 2019 Wynn Anderson

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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