Botanical Journal of the Linnean Society
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A population of Himantoglossum hircinum(L.) Spreng. (lizard orchid) has been monitored since the 1940s at a site in the south-east of Great Britain. A map of the site showing the number and position of flowering plants has been produced in most summers between 1978 and 1994. The maps ...
Orchid seeds are minute and the first seedling stages of terrestrial species are underground, so there is little knowledge about the biology of the early life history and the size of seed/seedling populations relative to the number of plants that eventually emerge above ground. A recently d...
Coeloglossum viride(L.) Hartm. has a worldwide distribution in the Northern hemisphere where it can be found in a broad range of habitats; it is not, at present, threatened with extinction. However, in several European countries there has been a dramatic decline in sites occupied by ...
Orchis militarisL. underwent a catastrophic decline in range and plant numbers in the British Isles around the end of the nineteenth century, and was long thought to be nationally extinct. A small number of colonies have been discovered since then, including one in Buckinghamshire, w...
Ophrys sphegodesis a rare species in the United Kingdom. The largest extant population of the species, at Castle Hill National Nature Reserve in Sussex, has been monitored each year since 1975. At each annual census, which is conducted during the peak period of flowering (May), the c...
Orchid population size has long been believed to be highly variable in time and space. Here we present the first quantitative assessment of the variability of orchid population sizes and compare them with plant and animal population data from the literature. Three measures of temporal varia...
The Sainsbury Orchid Conservation Project (SOCP), based in the Micropropagation Unit of the Royal Botanic Gardens, Kew, has worked for many years with English Nature, and the Species Recovery Programme in particular, in raising plants of the lady's slipper orchid for re-establishment. This ...
The conservation of few plants produces such an emotive response as that of hardy slipper orchids of the genus Cypripedium. The genus, comprising 45 species and two varieties, is holarctic in distribution with the centre of diversity in China. Much is known about the status of some sp...
The fenland form of Liparis loeseliiis currently known from only three sites in eastern England, having been lost from about 30 former localities since the start of the nineteenth century. The reason for its loss is sometimes uncertain, but in only a small number of instances can it b...
Information taken from two long-term demographic studies on Orchis morioL. and Herminium monorchis(L.) R.Br. is used to explore some of the factors which influence flowering. The proportion of plants which flowered each year varied considerably between species, flowering in ...
One of the challenges facing orchid conservationists is to get a better understanding of seed parent fecundity. This can be especially laborious for orchids whose seed is difficult to germinate. Mature seeds of Cypripedium calceolusvar. pubescens(Willd.) Correll (Orchidaceae) ha...
The overall mean percentage of fruiting for over 3500 flowers observed in eight Estonian populations of a self-compatible clonal orchid Cypripedium calceolusover 11 years was 10.5%. The larger clones set relatively fewer fruits, otherwise the general pattern of fruiting was close to r...