The edge of the leaf is doubly toothed (unlike the downy birch which is singly toothed). [2], Both B. pubescens and B. pendula can be tapped in spring to obtain a sugary fluid. [12], The larva of the autumnal moth (Epirrita autumnata) feeds on the foliage of Betula pubescens and other tree species. The genus Betula comprises some 40 species, both trees, shrubs, and dwarf shrubs. BETULA PUBESCENS – Downy Birch Characteristics Many people find it difficult to distinguish between Betula pendula – Silver Birch and Betula pubescens – Downy Birch, particularly when they are young. It is a deciduous tree growing to 10 to 20 m (33 to 66 ft) tall (rarely to 27 m), with a slender crown and a trunk up to 70 cm (28 in) (exceptionally 1 m) in diameter, with smooth but dull grey-white bark finely marked with dark horizontal lenticels. Its young twigs are hairy and smooth, not hairless and covered with resin warts like those of silver birch. [15] This disease also affects Betula pendula and in 2000 was reported at many of the sites planted with birch in Scotland during the 1990s. Betula alba), commonly known as downy birch and also as moor birch, white birch, European white birch or hairy birch, is a species of deciduous tree, native and abundant throughout northern Europe and northern Asia, growing farther north than any other broadleaf tree. [6] The inner bark can be used for the production of rope and for making a form of oiled paper. These may eventually overshadow the downy birch and replace it as the dominant tree. Betula pubescens is commonly known as downy birch, with other common names including moor birch, white birch, European white birch or hairy birch. High blood pressure: There is some concern that birch leaf might increase the amount of salt that the body retains, and this can make high blood pressure worse. and hybrids Sarah E. Edwards. Scientific Name: Betula pubescens. It grows to an altitude of 760 m in Scotland. Average Dried Weight: 39 lbs/ft 3 (625 kg/m 3) Specific Gravity (Basic, 12% MC):.48, .62. czerepanovii) dominates. This is how north-western Europe was recolonised by trees following th… They flower when coming into leaf in the spring. Both can get to 20m (65ft) have silvery white bark and a similar shaped leaf. Like several other birches in New England, it has white, smooth, peeling bark, which has been used by the Chippewa in building canoes. The observations are collected either on paper and are subsequently submit-ted manually to an open-source online database or submitted directly via a newly developed mobile app. Narrowly conical habit. 8–20 m. Flower: Small, greenish to brownish, lacking perianth. Downy birch is native to Europe but has naturalized in Connecticut, Massachusetts, Maine, and Vermont. Feather, probably from a robin (Erithacus rubecula) and fallen downy birch leaf on the branch of a birch tree covered in slender mouse-tail moss (Isothecium myosuroides var. Some of the most common fungi include Ceriporia reticulata, Chondrostereum purpureum, Exidia repanda, Hyphoderma spp, Inonotus obliquus, Inonotus radiatus, Mycena galericulata, Mycena rubromarginata, Panellus ringens, Peniophora incarnata, Phellinus lundellii, Radulomyces confluens, Stereum rugosum, Trechispora spp., Tubulicrinis spp. Dwarf Birch, Downy birch can reach over 20m in height with a light canopy and slender crown. Downy birch, also known as white birch, is a very variable tree. Downy birch is a deciduous broadleaf tree native to the UK and northern Europe and northern Asia It is also known as moor birch, white birch, common white birch and European white birch Downy birch is found on damper soils than silver birch, and can even tolerate waterlogged or peaty condition It quickly grows into a tree, up to 30m, with a dominant trunk and overhanging branches. This variety is notable as being one of very few trees native to Iceland and Greenland, and is the only tree to form woodland in Iceland. Birch leaves are a source of food for various butterflies. Always green at emergence. Appearing from April to May, male catkins are long and yellow-brown in colour. White Birch, Downy birch: Family: Betulaceae: USDA hardiness: Coming soon: Known Hazards : The aromatic and aliphatic hydrocarbons in birch tar are irritating to the skin. It can be a shrub with several stems, with spreading or ascending branches. The bark can also be turned into a high quality charcoal favoured by artists. The two species can be distinguished by their leaves, with those of downy birch being rounder in shape than silver birch, and having a single row of teeth on the leaf margin, in contrast to the double row of teeth on silver birch leaves. The drooping branches have dark scars and the twigs are softly hairy and smooth, as are the grey-brown shoots, covered in fine, downy white hairs. The leaf margins also differ, finely serrated in downy birch, coarsely double-toothed in silver birch. → Distribution map of Mountain birch (Kasviatlas, University of Helsinki). [17], The Sami people of Scandinavia used the bark of both B. pubescens and B. pendula as an ingredient in bread-making; the reddish phloem, just below the outer bark, was dried, ground up and blended with wheat flour to make a traditional loaf. Young leaves of Downy Birch are thinly pubescent. woodlands. [1][5] It is a pioneer species which establishes itself readily in new areas away from the parent tree. Downy birch is the most commonly seen birch in Northern Ireland. [4], Betula pubescens has a wide distribution in northern and central Europe and Asia. In spring, the male catkins (or 'lamb's tails') turn yellow and shed their pollen, which is carried by the wind to the short, green, female catkins that appear on the same tree. This makes it possible for other, more demanding trees to move in. Damage to the leaf tissue stimulates the tree to produce chemicals that reduce foliage quality, retarding the growth of the larvae and reducing their pupal weights. [2][3], B. pubescens is closely related to, and often confused with, the silver birch (B. pendula). Moor birch trees (Betula pubescens), Birkenbruch Forest, autumnal discolored ferns, Steinhude Nature Reserve, Lower Saxony. Birch Rust caused by Melampsoridium betulinum on leaf of downy birch or Betula pubescens - Buy this stock photo and explore similar images at Adobe Stock Sales: 888-649-2990 Sell [21] The removal of bark was at one time so widespread that Carl Linnaeus expressed his concern for the survival of the woodlands. Tough and flexible timber of downy birch is good for making furniture. In Iceland, dwarf birch and downy birch sometimes hybridise, the resulting plants being triploid (with three sets of chromosomes). Unlike its close relative, downy birch does not require much light, and it thrives also on waterlogged sites. Simple leaf that is roughly triangular with rounded corners and a leaf margin that is quite toothed (serrated). Inês da Costa Rocha. Both silver birch and downy birch have a wide natural dis-tribution area on the Eurasian continent, ranging from the Silviculture of birch ( Betula pendula Roth and Betula pubescens Ehrh.) 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