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Acanthospermum hispidum

(Hispid Greenstripe)

Common Names

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Click on the language to view common names.

Common Names in English:

Bristly Starbur, Goat´s-Head, Hispid Greenstripe, Hispid Starburr, Starbur

Common Names in Portuguese:

Cabeça-De-Boi, Carrapicho-Chifre-De-Veado, Carrapicho-De-Carneiro, Espinho-De-Agulha, Espinho-De-Cigano

Common Names in Spanish:

Corona De La Reina, Cuagrilla

Description

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Genus Acanthospermum

Annuals (sometimes persisting), 10-60(-120) cm. Stems erect to ± prostrate (repeatedly "forked"). Leaves cauline; opposite; petiolate or ± sessile; blades mostly elliptic to deltate, rhombic , or ovate , sometimes lyrate, ultimate margins entire or toothed , faces usually pilosulous to sericeous or scabrellous, sometimes glabrate or glabrescent , usually gland-dotted. Heads radiate , 1(-3) in "forks" of branches (terminal , appearing axillary by sympodial growth). Involucres ± hemispheric , 3-5 mm diam. (becoming ± rotate in fruit). Phyllaries persistent (outer) or falling, 10-13 in 2 series (outer 4-6 herbaceous, inner 5-8 each investing a ray ovary, enlarging in fruit to form a perigynium, shed with enclosed cypsela). Receptacles convex , paleate (paleae cuneate to spatulate , ± conduplicate or flattish, membranous). Ray florets 5-8, pistillate , fertile ; corollas yellowish (tubes shorter than to equaling laminae , laminae ovate to elliptic or linear ). Disc florets 3-8(-12+), functionally staminate ; corollas yellowish, tubes shorter than funnelform or campanulate throats , lobes 5, deltate. Cypselae each enclosed within and shed with an often hardened, ± prickly perigynium (the ultimate "fruits" plumply ellipsoid to fusiform , or ± compressed ) ; pappi 0 or rudimentary . x = 11.

Species 6: introduced ; mostly tropical to warm-temperate New World; also introduced in Old World.[1]

Physical Description

Species Acanthospermum hispidum

Plants 10-60+ cm. Stems erect . Leaf blades rhombic-ovate to obovate , (20-) 40-120(-150+) mm, faces finely pilosulous, gland-dotted. Fruits ± compressed , ± cuneate to obovate, 4-6+ mm, not notably ribbed , terminal spines 2, divergent, 3-4 mm, often 1 ± uncinate , prickles seldom notably uncinate, ± scattered . 2n = 22. Flowering year round, mostly Aug-Oct. [source]

Habit: Forb/herb

Habitat

Disturbed , often sandy sites; 0-100+ m [2].

Typically found at an altitude of 0 to 3,992 meters (0 to 13,097 feet).[3]

Biology

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Reproduction

Duration: Annual , Perennial

Taxonomy

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Unambiguous Synonyms

  1. Acanthospermum Humile Hispidum

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Place of publication : Prodr. 5:522. 1836

Name verified on 31-Aug-2004 by ARS Systematic Botanists. Last updated: 31-Aug-2004

Similar Species

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Members of the genus Acanthospermum

ZipcodeZoo has pages for 20 species, subspecies, varieties, forms, and cultivars in this genus:

A. australe (Paraguayan Starburr) · A. brachyceratum · A. brasilianum · A. brasilium · A. brasilum · A. consobrinum · A. donii · A. glabratum · A. hirsutum · A. hispidum (Hispid Greenstripe) · A. humile (Roadside Greenstripe) · A. humile var. normale · A. lecocarpoides · A. leptolobum · A. microcarpum · A. simile · A. spinosum · A. xanthioides (Southern Starburr) · A. xanthioides var. acutifolium · A. xanthioides var. obtusifolium

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 15, 2007:

Identifiers

Footnotes

  1. John L. Strother "Acanthospermum". in Flora of North America Vol. 21 Page 33, 36. Oxford University Press. Online at EFloras.org. [back]
  2. "Acanthospermum hispidum". in Flora of North America Vol. 21 Page 37. Oxford University Press. Online at EFloras.org. [back]
  3. Mean = 266.220 meters (873.425 feet), Standard Deviation = 648.630 based on 237 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/1/2009