New in October 2014 from the ISC

In October 2014 the following datasheets were published on CABI’s Invasive Species Compendium (ISC). You can explore the open-access ISC here: www.cabi.org/isc

Silybum marianum Invasive Species Compendium datasheet
Silybum marianum Invasive Species Compendium datasheet

Silybum marianum (variegated thistle) – this large, aggressive thistle was already recognised as a serious invasive way back in the 1800s. Native to the Mediterranean and parts of Asia and Russia, S. marianum is now present on every continent except Antarctica. Standing up to two metres tall, and armed with a spiky flowerhead and prickly leaves, the thistle can outcompete native plants, swamp farmland and impede the movement of people and animals. If eaten, S. marinaum can cause potentially fatal nitrate poisoning.

Lumbricus terrestris (lob worm) – after more than 2000 years of human-mediated introductions, the humble earthworm is now found in South Africa, India, Australia, New Zealand, Europe and North America, where it has picked up the exciting name nightcrawler. When introduced to an environment lacking native earthworms, L. terrestris can dramatically alter soil profiles. Thick leaf mats are quickly converted to humus, depriving native invertebrates of a habitat, altering the microbial community and changing the chemistry of the forest floor.

Cestrum nocturnum (night jessamine) – native to Central America, this showy and fragrant but toxic shrub is now widespread throughout the Old and New World tropics, where it forms dense thickets that crowd out native flora. Its small and profuse seed means there is a high risk of further introductions. C. nocturnum is known to be invasive in Hawaii, the Cook Islands, Fiji, French Polynesia, Western Samoa, Tonga, New Caledonia and New Zealand.

Other invasive species datasheets recently published include:

Acacia hockii (white thorn acacia)
Amaranthus dubius (spleen amaranth)
Dipsacus fullonum (common teasel)
Ehrharta erecta (panic veldtgrass)
Erodium botrys (long-beaked stork’s bill)
Erodium cicutarium (common storksbill)
Gaillardia pulchella (Indian blanket)
Glechoma hederacea (ground ivy)
Hypochaeris radicata (cat’s ear)
Juncus planifolius (broadleaf rush)
Lactuca floridana (woodland lettuce)
Lolium perenne (perennial ryegrass)
Lonicera maackii (Amur honeysuckle)
Malva pusilla (round-leaved mallow)
Marrubium vulgare (horehound)
Melilotus albus (honey clover)
Mentha pulegium (pennyroyal)
Nasturtium microphyllum (one-row watercress)
Odontonema callistachyum (purple firespike)
Oryza barthii (African annual wild rice)
Oxalis corniculata (creeping woodsorrel)
Parentucellia viscosa (yellow glandweed)
Paspalidium geminatum (Egyptian paspalidium)
Persicaria punctata (dotted smartweed)
Polycarpon tetraphyllum (fourleaf allseed)
Rosa multiflora (multiflora rose)
Rubus rosifolius (roseleaf raspberry)
Sanchezia parvibracteata (sanchezia)
Silene gallica (common catchfly)
Stenotaphrum secundatum (buffalo grass)
Tibouchina herbacea (cane tibouchina)