Vernonia sechellensis

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

Overview

Extinct

Interesting Facts

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 Vernonia

Perennials, 2-20(-30+) dm (rhizomatous or not) . Leaves usually mostly cauline (rarely mostly basal or basal and cauline) ; sessile or petiolate ; blades ovate , elliptic , lanceolate, oblanceolate , spatulate , linear , or filiform , bases usually ± cuneate (rounded-truncate in V. pulchella), margins usually toothed (rarely entire), apices acute to attenuate, abaxial faces usually ± scabrellous to strigillose or tomentose to pannose , sometimes glabrate or glabrous , usually resin-gland-dotted (sometimes ± pitted ), adaxial faces ± scabrellous or glabrate, sometimes resin-gland-dotted (rarely pitted) . Heads discoid , ± pedunculate , not subtended by foliaceous bracts, (6-) 40-100+ in ± corymbiform to paniculiform arrays (6-) 10-25+ cm diam. Involucres ± campanulate to obconic or hemispheric , 3-8(-11+) mm diam. Phyllaries 18-70+ in 4-7+ series, the outer ovate to lanceolate or subulate , inner ± lanceolate to oblong , all ± chartaceous , margins entire, often ciliolate , tips rounded (then sometimes apiculate ), or acuminate, subulate, or filiform, faces glabrous or sparsely strigillose to tomentose, sometimes ± gland-dotted. Florets 9-30(-65+) ; corollas usually purplish or pink (rarely white), tubes longer than funnelform throats , lobes 5, lance-linear , ± equal. Cypselae ± columnar , sometimes arcuate , 8-10-ribbed, glabrous or ± strigillose to hirtellous, often resin-gland-dotted; pappi persistent , of 20-30+ outer, erose to subulate scales or bristles plus 20-40+ inner, longer, subulate to setiform scales or bristles. x = 17.

Species 20 or so: mainly c, e North America, n Mexico, 2-3 species in South America.

The circumscription of Vernonia adopted here follows that of H. Robinson (1999) .

Vernonias hybridize ; almost every one of the species recognized here has been noted as sometimes hybridizing with one or more others. Putative hybrid plants are usually intermediate between parentals in some traits ; such plants may not "key" satisfactorily to any of the species treated here. Some putative hybrids have been named. Vernonia guadalupensis is "without much doubt a hybrid of V. baldwinii Torrey and V. lindheimeri Engelmann & Gray" (L. H. Shinners 1950) ; V. vulturina Shinners (known only from the type collection ) may be a product of V. baldwinii × V. marginata; V. ×georgiana Bartlett may refer to V. acaulis × V. angustifolia. Additional putative hybrids (S. B . Jones 1964) are V. ×concinna Gleason (V. ovalifolia × V. angustifolia), V. ×dissimilis Gleason (V. altissima × V. angustifolia), and V. ×recurva Gleason (V. pulchella × V. angustifolia) .[1]

Habitat

Biome: Terrestrial [2].

Ecology: This species inhabited primary forest on Mahé.[2].

List of Habitats :

•     1     Forest   
  
•     1.6     Forest - Subtropical/Tropical Moist Lowland   
[more info]

Taxonomy

Synonyms

Cacalia sechellensis • Vernonia seychellensis

Notes

Name Status: Accepted Name .

Comment: Data Providers: Govaerts World Compositae Checklist A-G, IPNI. GCC LSID: urn :lsid:compositae.org:names:B6BFC020-0E83-4CDC-B745-21FCF6AF4110

Last scrutiny: 17-Aug-09

Similar Species

Members of the genus Vernonia

ZipcodeZoo has pages for 35 species, subspecies, varieties, forms, and cultivars in this genus:

V. acaulis (Stemless Ironweed) · V. albicaulis (Santa Maria) · V. angustifolia mohrii (Tall Ironweed) · V. anthelmintica (Ironweed) · V. arkansana (Arkansas Ironweed) · V. baldwinii (Baldwin Ironweed) · V. blodgettii (Blodgetts Ironweed) · V. borinquensis (Puerto Rico Ironweed) · V. concinna (Ironweed) · V. dissimilis (Ironweed) · V. fasciculata corymbosa (Ironweed) · V. flaccidifolia (Tennessee Ironweed) · V. galamensis (Ironweed) · V. galamensis galamensis (Ironweed) · V. georgiana (Ironweed) · V. gigantea (Giant Ironweed) · V. gigantea gigantea (Giant Ironweed) · V. gigantea ovalifolia (Giant Ironweed) · V. glauca (Broadleaf Ironweed) · V. guadalupensis (Guadalupe Ironweed) · V. illinoensis (Illinois Ironweed) · V. larsenii (Larsen's Ironweed) · V. lettermannii (Gray Narrowleaf Ironweed) · V. lindheimeri (Woolly Ironweed) · V. marginata (Ironplant) · V. missurica (Missouri Ironweed) · V. noveboracensis (New York Ironweed) · V. noveboracensis 'Richard Simon' (New York Ironweed) · V. peralta (Ironweed) · V. proctori (Proctor's Ironweed) · V. pulchella (Georgia Ironweed) · V. sericea (Longshoot) · V. texana (Texas Ironweed) · V. vulturina (Ironweed) · V. x georgiana (Ironweed)

More Info

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Further Reading

• Baker, J.G. 1877. Flora of Mauritius and the Seychelles: A Description of the Flowering Plants and Ferns of those Islands. L. Reeve & Co., Convent Garden, London, UK.
• Friedmann, F. 1994. Flore des Seychelles. Dicotyle?dones. OSTROM, Paris, France.
• IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.2). Available at: http://www.iucnredlist.org. (Accessed: 10 November 2011).
• Vesey-Fitzgerald, D. 1940. On the vegetation of the Seychelles. Journal of Ecology 28: 465-483.
• Gleason, H. A. 1922b. Vernonia. In: N. L. Britton et al., eds. 1905+. North American Flora. 47+ vols. New York. Vol. 33, pp. 5295.
• Jones, S. B. 1964. Taxonomy of the narrow-leaved Vernonia of the southeastern United States. Rhodora 66: 382401.
• Jones, S. B. and W. Z. Faust. 1978. Vernonia. In: N. L. Britton et al., eds. 1905+. North American Flora. 47+ volumes. New York. Ser. 2, part 10, pp. 180195.
• Shinners, L. H. 1950. Notes on Texas Compositae. IV. Field & Lab. 18: 2532.

Notes

Contributors

• Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 12, 2012.
• Huber, M.J., Ismail, S. & Mougal, J. 2011. Vernonia sechellensis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloadedon 05February2012.
• IUCN 2012. IUCN Red List of Threatened Species. Version 2011.2. . Downloaded on January 28, 2012.

Identifiers

• Catalogue of Life Accepted Name Code: Ast-8690
• IUCN ID: 248520
• Zipcode Zoo Species Identifier: 4457824

Footnotes

1. John L. Strother "Vernonia". in Flora of North America Vol. 19, 20 and 21 Page 58, 67, 200, 201, 206, 207. Oxford University Press. Online at EFloras.org. [back]
2. Huber, M.J., Ismail, S. & Mougal, J. 2011. Vernonia sechellensis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 05 February 2012. [back]

©2004-2012 David Stang. All rights reserved.