Ageratina ligustrina

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

Overview

Interesting Facts

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.

Genus Ageratina

Perennials , subshrubs , or shrubs [trees ], mostly 20-220 cm. Stems usually erect , rarely scandent , sparsely to densely branched. Leaves cauline; mostly opposite (distal sometimes alternate) ; petiolate ; blades 3(-5) -nerved from bases , usually deltate, lanceolate, ovate , rhombic , or triangular, sometimes orbiculate, margins entire, crenate , dentate , or serrate, faces glabrous or hispidulous , pilose , or puberulent , sometimes gland-dotted (A. occidentalis, A. adenophora). Heads discoid , usually in compact , (terminal and axillary ) corymbiform arrays, sometimes borne singly. Involucres campanulate , 3-6 mm diam. Phyllaries persistent , 8-30 in 2(-3) series, 0- or 2-nerved, lanceolate to linear , ± equal (herbaceous). Florets 10-60; corollas white or lavender, throats obconic to campanulate (lengths 1.5-2 times diams.) ; styles: bases sometimes enlarged, glabrous, branches linear, seldom distally dilated . Receptacles convex (glabrous or hairy ), epaleate. Cypselae prismatic or ± fusiform , usually 5-ribbed, scabrellous and/or gland-dotted; pappi usually persistent, sometimes fragile, rarely falling, of 5-40, barbellulate bristles in 1 series. x = 17.

Species ca. 250: North America, Mexico, Central America, Andean South America.[1]

Physical Description

Biology

Growth

Culture: Space 4-6' apart.

Sunlight: Sun Exposure: Full Sun .

Temperature: Cold Hardiness: 9a, 9b, 10a, 10b, 11. (map)

Taxonomy

Synonyms

Ageratina ligustrina< /i> (Dc.) R. M. King & H. Rob.Eupatorium Ligustrinum

Notes

Name Status: Accepted Name .

Comment: Data Providers: CONABIO, Govaerts World Compositae Checklist A-G, IPNI, MesoAmericana, Tropicos. GCC LSID: urn :lsid:compositae.org:names:4CD47C5F-2A38-4A57-B78E-2CA6CC4437DD

Last scrutiny: 17-Oct-09

Similar Species

Members of the genus Ageratina

ZipcodeZoo has pages for 24 species, subspecies, varieties, forms, and cultivars in this genus:

A. adenophora (Crofton Weed) · A. altissima (Richweed) · A. altissima (L.) R.M.King and H.Rob. var. roanensis (Small) Clewell and Wo (Appalachian White Snakeroot) · A. altissima var. altissima (White Snakeroot) · A. altissima var. angustata (White Snakeroot) · A. altissima var. roanensis (White Snakeroot) · A. aromatica (Lesser Snakeroot) · A. aromatica (L.) Spach var. aromatica (L.) Spach (Lesser Snakeroot) · A. aromatica (L.) Spach var. incisa (Gray) C.F.Reed (Lesser Snakeroot) · A. aromatica var. aromatica (Lesser Snakeroot) · A. aromatica var. incisa (Lesser Snakeroot) · A. havanensis (Havana Snakeroot) · A. herbacea (Fragrant Snakeroot) · A. jucunda (Hammock Snakeroot) · A. lemmonii (Lemmon's Snakeroot) · A. ligustrina (Ageratina) · A. luciae-brauniae (Lucy Braun's Snakeroot) · A. occidentalis (Western Eupatorium) · A. paupercula (Santa Rita Mountains Thorough-Wort) · A. resiniflua (Resinous Snakeroot) · A. riparia (Creeping Croftonweed) · A. rothrockii (Rothrock's Snakeroot) · A. shastensis (Shasta Eupatorium) · A. wrightii (Wright Snakeroot)

More Info

• Search for Pictures: images.google.com
• Search for Scholarly Articles: Google Scholar
• Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
• Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books

Further Reading

• Flora of Guatemala / Dorothy L. Nash, Louis O. Williams; genera contributed by Kenneth M. Becker. .. [et al.]. 24 1976 Chicago, Ill.: Field Museum of Natural History, 1976. url p. 104.
• Clewell, A. F. and J. W. Wooten. 1971. A revision of Ageratina (Compositae: Eupatorieae) from eastern North America. Brittonia 23: 123-143

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.

Data Sources

Accessed through GBIF Data Portal January 24, 2008:

• Comisión nacional para el conocimiento y uso de la biodiversidad, Herbario del Instituto de Ecología, A.C., México
• Comisión nacional para el conocimiento y uso de la biodiversidad, Herbario del Instituto de Ecología, A.C., México
• Instituto Nacional de Biodiversidad
• , Biodiversidad de Costa Rica
• Missouri Botanical Garden, Missouri Botanical Garden

Identifiers

• Biodiversity Heritage Library NamebankID: 5874753
• Catalogue of Life Accepted Name Code: Ast-3903
• Globally Unique Identifier: urn:lsid:ipni.org:names:175321-1
• International Plant Names Index (IPNI) ID: 175321-1
• MoBot NameID: 2712269
• Zipcode Zoo Species Identifier: 708135

Footnotes

1. Guy L. Nesom "Ageratina". in Flora of North America Vol. 21 Page 461, 462, 541, 547, 552. Oxford University Press. Online at EFloras.org. [back]

©2004-2012 David Stang. All rights reserved.