Ambrosia psilostachya

• Overview
• Interesting Facts
• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Overview

Interesting Facts

Common Names

Click on the language to view common names.

Description

Family Compositae

The largest family of flowering plants , the Compositae (Asteraceae), comprising about 1,100 genera and more than 20,000 species and characterized by many small flowers arranged in a head looking like a single flower and subtended by an involucre of bracts. A head may consist of both ray flowers and disk flowers, as in the sunflower, of disk flowers only, as in the burdock, or of ray flowers only, as in the dandelion.

Tribe Heliantheae

The Heliantheae are a tribe of closely related genera of the sunflower family that can be readily recognized due to the association of a receptacular bract or chaff scale with each disk floret in the head . The heads usually include bisexual , actinomorphic disk florets with tubular corollas that have 4 or 5 distal lobes and also peripheral zygomorphic female or sometimes sterile florets with strap-shaped corollas that have 3 or fewer distal teeth. However, the ray flowers are sometimes absent and the heads are then discoid , containing only bisexual florets with tubular corollas. The pappus is absent or more commonly ranges from scales to stiff bristles . -- Gerald Carr.

Genus Ambrosia

Annuals , perennials , or shrubs , 10-400+ cm (usually rhizomatous ). Stems erect , decumbent , or prostrate , branched. Leaves usually cauline; opposite ± throughout or opposite (proximal ) and alternate or mostly alternate; sessile or petiolate ; blades (or lobes ) deltate, elliptic , filiform , lanceolate, linear , obovate , ovate , or rhombic (and most intermediate shapes ), usually pinnately, sometimes palmately lobed , ultimate margins entire or toothed , faces hairy or glabrate , usually gland-dotted or stipitate-glandular . Heads discoid (unisexual , pistillate proximal to or intermixed with staminates , staminates usually in racemiform to spiciform arrays; rarely, single plants all or mostly staminate or pistillate). Pistillate heads: phyllaries 12-30(-80+) in 1-8+ series, outer (1-) 5-8 distinct or ± connate , herbaceous, the rest (sometimes interpreted as paleae) ± connate, usually with free tips forming tubercles , spines, or wings (the whole becoming a hard perigynium or "bur") ; florets 1(-5+), corollas 0. Staminate heads: involucres cup-shaped to saucer-shaped , 1.5-6+ mm diam.; phyllaries 5-16+ in ± 1 series, ± connate; receptacles ± flat or convex ; paleae spatulate to linear, membranous, sometimes villous , hirtellous, and/or gland-dotted or stipitate-glandular, sometimes none; florets 5-60+; corollas whitish or purplish, ± funnelform , lobes 5, erect or incurved ; staminal filaments connate, anthers distinct or weakly coherent. Cypselae (black) ± ovoid or fusiform , enclosed within globose to obovoid , pyramidal , pyriform , obconic, or fusiform, hard, smooth , tuberculate , spiny , or winged "burs"; pappi 0. x = 18.

Species 40+: tropical to subtropical and temperate New World, mostly North America, some established in Old World.[1]

Physical Description

Habitat

Disturbed sites, often wet, alkaline , clay soils ; 0-2200 m (Ref. 51603).

Typically found at an altitude of 0 to 2,998 meters (0 to 9,836 feet).[2]

Biology

Reproduction

Duration: Annual , Perennial

Growth

Culture: Space 12-15" apart.

Sunlight: Sun Exposure: Full Sun .

Moisture: Drought Tolerance: High

Temperature: Cold Hardiness: 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b. (map)

Taxonomy

Synonyms

A. psilostachya var. coronopifolia (Torrey & A. Gray) Farwell • A. psilostachya var. lindheimeriana (Scheele) Blankinship • A. rugelii Rydberg • Ambrosia californica Rydb. • Ambrosia coronopifolia Torr. & Gray • Ambrosia cumanensis auct. non Kunth • Ambrosia psilostachya var. californica (Rydberg) S. F. Blake • Ambrosia psilostachya var. coronopifolia (Torr. & Gray) Farw. • Ambrosia psilostachya var. lindheimeriana (Scheele) Blank. • Ambrosia rugelii Rydb.

Notes

Name Status: Accepted Name .

Comment: Data Providers: CONABIO, African Flowering Plants Database , SANBI, New Zealand Plant Name Database, Govaerts World Compositae Checklist A-G, IPNI, Tropicos, Euro+Med, Queensland Census, New South Wales Flora Online, Western Australia Census, Electronic F. GCC LSID: urn :lsid:compositae.org:names:0FFDCFBB-8051-476D-8CD9-94E5013AB0C7

Last scrutiny: 13-Nov-09

Similar Species

Members of the genus Ambrosia

ZipcodeZoo has pages for 36 species, subspecies, varieties, forms, and cultivars in this genus:

A. acanthicarpa (Annual Bursage) · A. ambrosioides (Ambrosia Bursage) · A. artemisifolia (Common Ragweed) · A. artemisiifolia (Annual Bur-Sage Ambrosia Artemisiifolia) · A. artemisiifolia L. var. artemisiifolia L. (Ragweed) · A. artemisiifolia L. var. paniculata (Michx.) Blank. (Annual Ragweed) · A. artemisiifolia var. artemisiifolia (Common Ragweed) · A. artemisiifolia var. elatior (Annual Ragweed) · A. artemisiifolia var. paniculata (Annual Ragweed) · A. bidentata (Lance-Leaf Ragweed) · A. canescens (Hairy Ragweed) · A. chamissonis (Beach-Bur) · A. cheiranthifolia (Rio Grande Ragweed) · A. chenopodiifolia (San Diego Ambrosia) · A. confertiflora (Ragweed) · A. cordifolia (Heartleaf Bursage) · A. deltoidea (Rabbit Bush) · A. dumosa (Burro Bush) · A. elatior var. elatior (Ragweed) · A. eriocentra (Hollyleaf Bursage) · A. grayi (Bur Ragweed) · A. helenae (Helen Ragweed) · A. hispida (Coastal Ragweed) · A. ilicifolia (Holly-Leaf Bursage) · A. intergradiens (Intergrading Ragweed) · A. linearis (Linear-Leaf Bursage) · A. peruviana (Peruvian Ragweed) · A. psilostachya (Cuman Ragweed) · A. pumila (Dwarf Burr Ragweed) · A. tenuifolia (Field Ragweed) · A. tomentosa (Bur Sage Ragweed) · A. trifida (Blood Ragweed) · A. trifida var. texana (Texan Great Ragweed) · A. trifida var. trifida (Great Ragweed) · A. × helenae (Helen Ragweed) · A. × intergradiens (Intergrading Ragweed)

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Further Reading

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Notes

Contributors

• "Ambrosia psilostachya". in Flora of North America Vol. 21 Page 12, 15, 18. Published by Oxford University Press. Online at EFloras.org.
• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
• GCC: Global Compositae Checklist. Release date: November 18, 2009
• Global Biodiversity Information Facility. Accessed January 23, 2008. http://www.gbif.org Mediated distribution data from 3 providers.
• Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.
• USDA, ARS, National Genetic Resources Program. Germplasm Resources Information Network - (GRIN) [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland. URL (April 27, 2008)

Data Sources

Accessed through GBIF Data Portal November 15, 2007:

• Australian National Herbarium
• , Australian National Herbarium
• Berkeley Natural History Museums, University and Jepson Herbaria DiGIR provider
• Canadian Museum of Nature, Canadian Museum of Nature Herbarium
• Institute of Nature Conservation PAS, IAS
• Missouri Botanical Garden, Missouri Botanical Garden
• National Herbarium of New South Wales, NSW herbarium collection
• Natural History Museum, University of Oslo, Vascular Plant Herbarium, Oslo
• Oregon State University, Vascular Plant Collection
• School of Life Sciences, Arizona State University, Arizona State University Vascular Plant Herbarium
• The New York Botanical Garden, Vascular Plant Type Specimens
• The Swedish Museum of Natural History
• , Herbarium of Oskarshamn
• UK National Biodiversity Network, Botanical Society of the British Isles - Vascular Plants Database
• USDA PLANTS, USDA PLANTS Database
• University of Alabama Biodiversity and Systematics, Herbarium
• University of Vienna, Institute for Botany - Herbarium WU, Herbarium WU

Identifiers

• Biodiversity Heritage Library NamebankID: 2657939
• Catalogue of Life Accepted Name Code: Ast-657
• Global Biodiversity Information Facility Taxonkey: 4490920
• Globally Unique Identifier: urn:lsid:ipni.org:names:176123-1
• GRIN Nomen Number: 103825
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 36516
• International Plant Names Index (IPNI) ID: 109235-3
• Natural Heritage Network Species Identifier: PDAST0C0L0
• U.S.D.A. Plant Symbol: AMRU2
• Zipcode Zoo Species Identifier: 20771

Footnotes

1. John L. Strother "Ambrosia". in Flora of North America Vol. 21 Page 3, 9, 10, 25. Oxford University Press. Online at EFloras.org. [back]
2. Mean = 537.320 meters (1,762.861 feet), Standard Deviation = 566.720 based on 1,194 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]

©2004-2012 David Stang. All rights reserved.