Trees and Shrubs Online

Trees & Shrubs Online is a project to create a modern reference for temperate trees & shrubs in cultivation. Currently there are ca. 730 genera & 4,500 species, each with an article describing subspecies, forms & cultivars. New material is being written and old material rewritten

Of the many great #plants @GardenHighBeech yesterday none was more jaw dropping than this Styrax hemsleyanus, outshining even the best Cornus kousa! @IDSTSO

Argyrocytisus battandieri in flower on the terraces @Ness_Gardens. According to @IDSTSO native of Morocco on the middle Atlas Mountains at 5,000 to 6,000 ft altitude, where it flowers in June. It was named in 1915 and introduced to this country about 1922.

This Meliosma veitchiorum is doing its best impression of a Laburnum @TheBotanics absolutely stunning! #rbgehort @IDSTSO

Our manuscript is online: "Genetic diversity in British populations of Taxus baccata L.: Is the seedbank collection representative of the genetic variation in the wild?" authors.elsevier.com/a/1YnsK1R~eAtpj @clareten @michaelffay60 @bede_west @Gabriele_Evo @KewScience @Kew_MSBUK

The rather wonderful Rhododendron schlippenbachii @Ness_Gardens. According to @IDSTSO discovered by Baron Schlippenbach on the coast of east Korea in 1854

Recent collection from #Sichuan #China of Corylopsis platypetala which is in the Witch Hazel family flowering @TheBotanics #rbgehort

2003 collection of Viburnum furcatum from #Honshu #Japan flowering edge of Woodland Garden @TheBotanics #RBGEhort

Early flowering Rhododendron moupinense from #Sichuan #China @TheBotanics lower Chinese Hillside #signsofspring #rbgehort

One of #Scotland's best Madroña (Arbutus menziesii) #trees at Castle Menzies, brightening up a #Perthshire winter! @PKCTrust @ArbAssociation @IDSTSO

NEWS: Ginkgo, monkey puzzle and Japanese cedar among unusual tree species in Forestry Commission garden at Chelsea → forestryengland.uk/news/unusual-s… #forests100

"The most widely traded illegal wild product in the world today is rosewood, an endangered hardwood prized for its use in traditional Chinese furniture." e360.yale.edu/features/the-r…

Distylium racemosum flowering at the @LovellQuintaArb yesterday morning. Not sure I agree with Bean that "It belongs to the curious rather than to the beautiful class of shrubs"! @IDSTSO

Hamamelis ×intermedia 'Jelena' in flower @TheBotanics with characteristics from both its parent species #Chinese mollis and #Japanese japonica #rbgehort

Help protect NY’s forests by learning how to ID and report hemlock woolly adelgid (HWA), an invasive forest pest that kills hemlocks in the eastern US. HWA infestations are best identified by their white woolly masses, seen Nov-April dec.ny.gov/animals/7250.h… #ForestFriday

Originating in Mexico the semi-evergreen leaves of our #oakoftheweek Quercus canbyi look great. Amongst the red oaks Q. Canbyi is unusual as its acorns ripen in the first autumn after flowering. This one was planted in 2003

#DidYouKnow that the genus #Stewartia was named for John Stuart, 3rd Earl of Bute @MS_gardens ? Full descriptions and horticultural accounts for the genus are now available here treesandshrubsonline.org/articles/stewa…

The last tree planted @BictonPark for #NationalTreeWeek was the @IUCNRedList endangered, Picea chihuahuana thanks to @BedgeburyP

This stunning Chinese evergreen always looks fantastic in the low winter sun. Quercus guyavifolia has the honour of being the first #oakoftheweek

The fine form of Viburnum x bodnantense 'Charles Lamont' named after 1930's Arboretum Supervisor @TheBotanics #rbgehort

Another #SeedDispersal enigma: #Calycanthus floridus - member of anciently-diverging #Magnoliid lineage w/ fossils tracing back >100 million yrs in eUS! Seeds held in persistent #hypanthium that hangs un-dispersed for 1 yr+, even as next crop ripens; toxic to mammals. What gives?