scholarly journals Ficus carica (common fig).

Author(s):  
Marianne Jennifer Datiles

Abstract Ficus carica, the common fig, is a rapidly growing tree that can spread by both seeds and cuttings, and if left unattended will form dense thickets that displace native trees and shrubs (Weber, 2003). It is known to be invasive to Australia and the western United States (Weber, 2003) since the introduction of its pollinator wasp to the USA in 1900 (Hanelt et al., 2001); in California's wildland, it is reportedly threatening the state's increasingly rare riparian forests (California Invasive Plant Council, 2014). The species is listed as "casual alien, cultivation escape, environmental weed, garden thug, naturalised, noxious weed, weed" in the Global Compendium of Weeds (Randall, 2012), but is not listed in the Geographical Atlas of World Weeds (Holm, 1979) and is currently considered a low-risk species according to a risk assessment of the species prepared for Hawaii (PIER, 2014). Re-evaluation is recommended in the future.


2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez ◽  
Charlie Riches

Abstract The erect, profusely tillering annual grass R. cochinchinensis grows up to a height of 4 m or more and is extremely competitive with annual crops, readily invading disturbed sites along roads and railways. Commonly known as itchgrass, it has brace roots near the base of the plant, a cylindrical spikelet seedhead and siliceous hairs on the leaf sheath that can penetrate and irritate the skin. Individual plants produce 2000 to 16,000 seeds that are shed as soon as they mature. A native of Indo-China, it is naturalised throughout the tropics of Asia, and is found in north-eastern Australia and savannah zones of Africa. It has been introduced into tropical America, as a potential pasture grass in the USA in the early 1900s and since the 1960s has been spread widely by contaminated rice seed, agricultural equipment and along transport routes in Central and South America, the Caribbean, and in the Gulf Coast region of the USA. An aggressive, significant weed in more than 40 countries, R. cochinchinensis is listed as a Federal Noxious Weed in the USA, and is suggested by Vibrans (2009) to be possibly the most harmful invasive plant in Mexico.





Author(s):  
Jeanine Velez-Gavilán

Abstract Pteris multifida is a herbaceous fern native to temperate and tropical eastern Asia and naturalized on many continents as a result of being widely cultivated. Although it is an urban weed, it is not considered by most countries as an invasive or noxious weed. There is no information available on the species affecting native species or natural habitats. Although one source lists P. multifida as an invasive species in many countries outside of Africa due to it being easily dispersed by spores, there are no references or further information to support this statement. It is reported as an alien invasive species in Germany, but only as occurring in sheltered sites, growing on light-vents in cellars and walls. A species assessment for Florida, USA indicates, P. multifida is neither a weed of natural habitats nor of agriculture. The species has not been listed as an invasive plant in any state or natural areas of the USA. However, P. multifida has been assigned a Tier II Invasive Species status (defined as having moderate negative impacts on wildlife or natural communities in Louisiana), but of limited concern and/or extent in Louisiana. Pteris multifida is recorded in Cuba as potentially invasive being categorized as a species with a tendency to proliferate in some areas and capable of producing vast amounts of diaspores with high dispersal potential. No further details are given about potential invasiveness.



1988 ◽  
Vol 75 (12) ◽  
pp. 1913-1922 ◽  
Author(s):  
N. G. Beck ◽  
E. M. Lord


1977 ◽  
Vol 79 (1) ◽  
pp. 163-171 ◽  
Author(s):  
J. GALIL ◽  
G. NEEMAN




2007 ◽  
Vol 7 (6) ◽  
pp. 1311-1314 ◽  
Author(s):  
D. BANDELJ ◽  
B. JAVORNIK ◽  
J. JAKSE


1988 ◽  
Vol 75 (12) ◽  
pp. 1904-1912 ◽  
Author(s):  
N. G. Beck ◽  
E. M. Lord


Sign in / Sign up

Export Citation Format

Share Document