Trees

Trees
Trees
A schematic, simplified and pragmatic classification of fruits is presented. This arrangement is principally based on external morphological characters. All fruit types are clarified by a few examples.
Trees

Two species of the genus Alangium are occasionally cultivated in the botanic gardens of central europe. the following paper gives an introduction to the genus. the species A. chinense and A. platanifolium are presented according to BS’s own studies in words and pictures. the leaf shape is highly variable so it is not possible to differentiate between species using the leaf as the sole criterion. Both species can usually be identified with the aid of inflorescences, flowers and fruits.

Trees
In the first of an occasional series of articles on tree species thought to be extinct in the wild, CAROL GURNEY introduces Amherstia nobilis (Fabaceae), which is spectacular in flower.
Trees
Araucaria araucana has its natural distribution in the Andes Mountains between 37o and 40o S and between 600 and 1800 m.a.s.l. Around 1960 its distribution area was estimated at 250,000 - 300,000 ha, with 75% on the Chilean side of the...
The conference opened in Auckland on Thursday morning with Professor David de Laubenfels, who has described more of the currently-accepted species in the family than any other scientist, presenting a controversial paper on ‘New...
Following the RHS Woody Plants Committee meeting on the 18 September 2008 at Wisley, HUGH McALLISTER AND KEITH RUSHFORTH thought it might be helpful to draw together their personal conclusions on the Thibetica group within the genus...
Trees
October 17, 2015

The root cause of my interest in trees was my father’s love of all the trees that we grew up with in South Africa. He was a member of the Dendrology Society, and was financially very generous to all who shared this interest and were promoting the knowledge of trees. One of the great projects at that time, c. 1955, was the palm-sized National Tree List that listed all the indigenous treeswithauniquenumber. OnselectedtreesthroughouttheKrugerNational Park, and in all rest camps, numbers were attached. For the first time ever, the general public were able to identify and compare trees. Following in his footsteps, I spent many thousands of dollars donating tree name tags to game lodges, parks etc. throughout Africa.

Trees

The root cause of my interest in trees was my father’s love of all the trees that we grew up with in South Africa. He was a member of the Dendrology Society, and was financially very generous to all who shared this interest and were promoting the knowledge of trees. One of the great projects at that time, c. 1955, was the palm-sized National Tree List that listed all the indigenous trees with a unique number.  

Trees
2012
GENNADY FIRSOV reflects on some of the outstanding species of trees that come into their own in the autumn at the St Petersburg Botanic Garden. 
Plant hunters have searched the globe travelling to far and distant places for millennia, but only in recent times have plant breeders realised the value of the earth’s germplasm. Vietnam, with an area of 330,000km2, contains at...
Trees
Following Chris Callaghan’s update on Cathaya in cultivation published in the 2008 yearbook, DICK VAN HOEY SMITH sent the following photos.
Trees
The discovery of the relict Cathaya argyrophylla or Cathay Silver Fir in a remote wilderness area of Kwangsi province (now Guangxi Zhuang Autonomous Region) in Southern China in May, 1955, created more than a ripple of excitement in...
Trees
Following the article published in the 2006 yearbook CHRIS CALLAGHAN has sent photos of Cathaya argyrophylla flowering in cultivation, outside China.
Trees
October 17, 2015

Researching the affinities of ‘Pseudocathaya’ featured in the previous yearbook (Callaghan 2011), has made me realise that there are a number of key facts regarding its progenitor, the endangered endemic relict Cathaya argyrophylla that are in error in the literature authored by numerous conifer authorities, and even in Flora of China of all places!

Trees

Researching the affinities of ‘Pseudocathaya’ featured in the previous yearbook (Callaghan 2011), has made me realise that there are a number of key facts regarding its progenitor, the endangered endemic relict Cathaya argyrophylla that are in error in the literature authored by numerous conifer authorities, and even in Flora of China of all places! 

Trees
FREDERIC WEBER has, since childhood, had the privilege of observing the cedar of Lebanon that has been growing at Le Vallon in Switzerland since the early nineteenth century. Here he lists the differences between Cedrus libani and C....
Trees
There is no doubt that the flowering dogwoods are among the most beautiful ornamental trees and shrubs. Gerd Krüssmann, co-founder of the IDS, once wrote that if he had to decide to grow just one species of the large-bracted dogwoods,...
Trees

Wood’s cycad is one of the most magnificent and rare plants of this family of ancient plants. It has been extinct in the wild for nearly a century. Only one four-stemmed male plant was ever found. It was first collected by John Medley Wood, director of the Natal Government Herbarium and leading Natal botanist. He was on a botanical expedition in Zululand in 1895, and found it when exploring Ngoye Forest (now spelt Ongoye). 

Trees
October 17, 2015

Wood’s cycad is one of the most magnificent and rare plants of this family of ancient plants. It has been extinct in the wild for nearly a century. Only one four-stemmed male plant was ever found. It was first collected by John Medley Wood, director of the Natal Government Herbarium and leading Natal botanist. He was on a botanical expedition in Zululand in 1895, and found it when exploring Ngoye Forest (now spelt Ongoye). 

Trees
Euonymus species are particularly prized for their decorative fruits. This work describes and illustrates (in water colour), the fruits and seeds of 30 commonly cultivated species found in Central European plant collections. The text...
Trees
In October 2010 a group of champion tree recorders, from all over Europe, met in Belgium, to exchange notes and discuss their findings. CHRISTOPHER CARNAGHAN1 reports on this international meeting, its purpose and aims, and makes an...
Trees
In the second of this occasional series on tree species extinct in the wild, CHARLES CRESSON, writes about the discovery of Franklinia alatamaha and its history in cultivation.
Trees
The walnuts have always excited interest for their combination of utility and beauty, but despite this, most species of Juglans remain little known in cultivation and poorly described in the literature, while specimens in many...
Trees
The Australian Bicentennial Arboretum celebrated its twentieth year in 2008 with the arrival of a new hybrid magnolia, appropriately herein named ‘Bicentennial’. In this article, CHRIS CALLAGHAN suggests that the...
Trees
On the IDS tour to Sikkim in May 2010 we found a few trees of Magnolia hodgsonii (Talauma hodgsonii), this very handsome low-altitude magnolia growing as widely spaced trees of about 12m high in the wild forest up the Teesta valley near...
Trees
In general magnolia seeds respond readily to a variety of rearing techniques, and experienced growers often evolve their own particular methods for getting good results. For those interested, the following advice from STEFAN COVER*...
Trees
As is so often the case, what was expected to be a leisurely pursuit of magnolia study in the tranquil atmosphere of the Australian Bicentennial Arboretum, turned out to be an exciting adventure into the wilderness of China’s remote...
Trees
October 17, 2015

The genus Acer is most frequently admired for its autumn colour and in some species its bark but one less well documented attribute is the diversity and beauty of its inflorescences. PETER GREGORY has been studying them for his new book on the identification of maples, What Maple is that?, and writes about the many different forms and colours the different species have. 

Trees

The genus Acer is most frequently admired for its autumn colour and in some species its bark but one less well documented attribute is the diversity and beauty of its inflorescences. Peter Gregory has been studying them for his new book on the identification of maples, What Maple is that?, and writes about the many different forms and colours the different species have. 

July 23, 2013 - Vietnam

Last year CHRIS CALLAGHAN travelled to Vietnam for a reconnaissance of the tallest mountain in the country, in search of a rare endemic fir.

Trees
The IDS Araucariaceae symposium, held in Auckland, New Zealand, 14-17 March 2002, and the pre-symposium tour of Northland is described above by Timothy Waters. Here we give an account of the post-symposium tour to New Caledonia, which...
Trees
Of the 34 known species of the genus Nothofagus, nine are found in Chile and Argentina, three in New Zealand, and three in Australia; the remaining 19 come from New Guinea and New Caledonia. Nothofagus are commonly called Southern Beech and...
Trees
Among the many street trees in Vancouver are numerous parrotias including two cultivars not mentioned in last years “Tree of the year”. CLIVE JUSTICE gives further details.
Trees
An over-view of the genus Picea (Pinaceae) in China is given, with particular reference to the P. likiangensis group of species. This group is considered to include P. likiangensis (Franch.) E. Pritz. subspecies likiangensis, P....
Trees
The silver fir (Abies: Pinaceae) in the Yarlung tsangpo drainage of southeast Tibet (Xizang, China) is compared with other species in Abies section Pseudopicea Hickel emend Farjon & Rushforth subsection Delavayianae Farjon &...
Trees
The newly described white pine from northeast Mexico Pinus stylesii Frankis ex Businský is compared with other related pines, including P. flexilis James, P. reflexa (Engelm.) Engelm., P. strobiformis Engelm., P. veitchii...
Trees
All over Greece, from the very north to the extreme south, on the mainland and islands alike, in villages or country towns, one finds magnificent, age-old plane trees draped gracefully over churchyards or main squares. In the squares,...
Trees
CHRIS CALLAGHAN of the Australian Bicentennial Arboretum reports the finding of an intriguing new conifer in the Pinaceae related to the living fossil Cathaya argyrophylla from China and, pending valid publication, provisionally...
Trees
Palms in Cuba, magnolias in China or conifers in Vietnam – all around the world tree species are in serious trouble. While the extinction crisis and the fate of the world’s forests have been relatively high profile in the past...
During the 1990s a plant was distributed under the name Quercus x fernaldii and was acquired by several collections in Britain and continental Europe. It was also listed under the name Quercus ilicifolia rubra or Q. ilicifolia x rubra.
Trees
During the Austrian Danube tour of June 2006 we were shown a layered oak in the Lednice Chateau Park situated in South Moravia (Czech Republic). At least one of the local foresters remembered the presence of a branch connecting the trunk...
Trees
The Commander Islands are the western group of the Aleutian Islands, the western extremity and the upper part of a huge underwater volcanic range, which protrudes from east to west for up nearly 2,000 kilometres. They lie in the northern...
Trees
The island of Sakhalin, situated at the eastern edge of Eurasia, is a unique region of Russia, and is home to a number of interesting plants. 75% of this large island (which measures 943 km from north to south) consists of hills and mountains,...
Trees
We arrived in Petropavlovsk-Kamchatsky on a gloomy July morning, after a nine-hour direct flight from Moscow. The primary purpose of this botanical expedition being to replenish the holdings of the herbaria of RBG Kew, UK, and the...
Trees
Though named in 1933 by Handel-Mazzetti and collected numerous times by George Forrest, Sorbus filipes does not seem to have been introduced to cultivation until recently (1985), since when several expeditions and individual...
Trees
October 17, 2015

Sorbus keenanii Rushforth is described from North East India and North Burma. The species is allied to Sorbus insignis and Sorbus harrowiana

Trees

Abstract: Sorbus keenanii Rushforth is described from North East India and North Burma. The species is allied to Sorbus insignis and Sorbus harrowiana

Trees
KEITH RUSHFORTH reviews the species in Sorbus section Thibeticae Aldsasoro et al and names a new section, Sorbus section Dunnii Rushforth and nine new species, viz Sorbus burtonsmithii Rushforth, Sorbus guanii Rushforth, Sorbus...
Trees
On a warm, sunny Friday afternoon in late October members from all over Europe gathered on the cafeteria terrace of Kalmthout Arboretum before being led out by its Director Abraham Rammeloo. Abraham briefly introduced the arboretum and...
Trees
The distribution zone of Taxus baccata extends from Finno-Scandia to Asia Minor and the Caucasus and southward into north Africa, but mainland Britain contains the greatest concentration of truly ancient trees. The range of this...
On a botanical exploration in October 1999 in remote karst limestone mountains NW of Quan Ba close to the Chinese border in the northern Vietnamese province of Ha Giang an unidentified conifer was found growing on the summit ridge of one of...
Trees
2012
ABRAHAM RAMMELOO, Curator of the Kalmthout Arboretum, writes about this rare conifer that recently produced seed for the first time. 
Trees
2012
On 7 November 2012 the Society held a national conference in the Jodrell Lecture Theatre at the Royal Botanic Gardens, Kew, on some of the threats facing trees not only in the United Kingdom but throughout the temperate world. Over...
October 17, 2015
In Saint-Petersburg the earliest cultivation of trees and shrubs is connected
with Peter the Great and goes back to the first years of existence of the new capital of Russia. It is also connected with his personal physician Robert Erskine, a nobleman from Scotland, who signed the edict on establishing
the Apothecary Garden on 14 February 1714 (now the Botanic Garden of the Komarov Botanical Institute of the Russian Academy of Sciences, BIN). Using
the main literature sources beginning with the first Catalogue of J. Siegesbeck (1736), it seems to be that more than 5,000 woody taxa have been tested here during three centuries. Another important dendrological collection in the city
is the Arboretum of the State Forest-Technical University, FTU (established
in 1833). More than 2,000 taxa are present in St-Petersburg’s parks and 63 gardens today.
October 17, 2015
In Saint-Petersburg the earliest cultivation of trees and shrubs is connected
with Peter the Great and goes back to the first years of existence of the new capital of Russia. It is also connected with his personal physician Robert Erskine, a nobleman from Scotland, who signed the edict on establishing
the Apothecary Garden on 14 February 1714 (now the Botanic Garden of the Komarov Botanical Institute of the Russian Academy of Sciences, BIN). Using
the main literature sources beginning with the first Catalogue of J. Siegesbeck (1736), it seems to be that more than 5,000 woody taxa have been tested here during three centuries. Another important dendrological collection in the city
is the Arboretum of the State Forest-Technical University, FTU (established
in 1833). More than 2,000 taxa are present in St-Petersburg’s parks and 63 gardens today.

A remarkable meteorological record dating back to the eighteenth century and uninterrupted phenological record dating back to the nineteenth century have been accumulated in Saint-Petersburg, Russia. GENNADY A. FIRSOV and INNA V. FADEYEVA have studied the effect of climate on the survival of the woody plants that have been grown in St-Petersburg’s parks and gardens for the last three centuries. 

Trees
CHRIS CALLAGHAN of the Australian Bicentennial Arboretum updates his woody plants comparison of Wa Shan and its sister mountain, World Heritage-listed Emei Shan, finding Wa Shan to be deserving of recognition as one of the...
Trees
Wollemia nobilis first hit the headlines in 1994 when David Noble found the grove of them northwest of Sydney, the exact location still secret. Tregothnan had been busy adding to its collection of rarities for and immediately set about...
Trees
2012
It is ten years since the first introductions of this conifer were made to cultivation. TOM CHRISTIAN assesses its performance in the United Kingdom and Ireland in this time. 
Trees
2012
SUSYN ANDREWS writes about unusual forms of dogwood that may deserve to be better known. 
Trees
The island of Rodrigues lies 574km east of Mauritius at 63° 30'E, 19° 40' S (Strahm 1996), in the western Indian Ocean. With Mauritius and Reunion it forms the Mascarenes group; a trio of young volcanic islands, the oldest...