A provisional vascular plant red data list for VC63 (S.W. Yorkshire) The first season's fieldwork - a review

摘要

In 2012, I announced plans to begin working towards the production of a Red Data Plant List for VC63 (Wilmore, 2013a) and gave a fairly comprehensive inventory of plant taxa which are (or were!) known to be rare or scarce in the vice-county. This listof plants was broken down into several categories: 1) Native Species; 2) Native Species Presumed Extinct in the VC; 3) Hybrids; 4) Archaeophytes; 5) Grey Area Species - Native or Introduced; and 6) Unconfirmed Species. The drawing up of this list was assisted and informed by Cheffings & Farrell (2005), in which various Threat Categories of Rarity are employed using IUCN (International Union for the Conservation of Nature and Natural Resources, now The World Conservation Union (WCU)) criteria. These are