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Class:angiosperms
Order:Fagales
Family:Betulaceae
Genus:Betula
Scientific name: Betula platyphylla Sukacz.
Name acc. to:Gubanov 1996
Herbar:list records    scans available    photo available    
Description:Leaves with 5-7 pairs of lateral veins. Floral scales of fruit-bearing aments large, with long base. Fruiting wings equal to nutlet or a little wider and much higher than nutlet.
Tax. Comments:Near to B. pendula. Species rank should be verify.
Comments:See also: http://www.manfred-vesper.de/datei.php?did=206 [DE] and http://www.manfred-vesper.de/datei.php?did=267 [MON]
Link to Flora of China:http://www.efloras.org/browse.aspx?flora_id=2&name_str=Betula+platyphylla
open map in a new windowtaxon distribution for Betula platyphylla acc. to Geobotanical Regions of Mongolia by Grubov (1955)
Habitat:Forms kolki and groves at mountain slopes, in river valleys and creek valleys within forest and forest-steppe belts, as well as occurs in larch, cedar-pine-larch and pine forests (Grubov 2001).
Habit (i)general appearance of a plant
Growth form: (i)Herb, shrub, tree or climber.tree (i)Woody plant with a clear main trunk, at least 2-3 m tall
example: Ulmus pumila

Parasite status: (i)Is the plant a half- or full parasite?no parasite/saprophyte (i)Plant fully autonomous, leaves with chlorophyll
example: Most plants, Ranunculus
inherited by family Betulaceae: no parasite/saprophyte
Water or terrestrial plant: (i)Where do the plants grow?terrestrial (i)Plant grows on dry land
example: Orostachys spinosa
inherited by family Betulaceae: terrestrial
Leaf (i)expanded, usually photosynthetic organ of a plant (including phylloclades)
Leaf development: (i)Structure and development of leaves.with green leaves (i)Plant with green leaves inherited by family Betulaceae: with green leaves
Leaf arrangement: (i)Arrangement of leaves at the stem.alternate (i)One leaf per node; distiche: arranged in two vertical rows, equitant
example: Phragmites
inherited by family Betulaceae: alternate
Simple or divided leaves: (i)Are the leaves simple or completely divided in several parts? Blade of the leaf entire or (more or less) deeply dissected. Attention: There are various appearances of the leaf margin (from entire to toothed and lobed). Here, we ignore this and ask only for dissections that separate the leaf for more than one third of its length or width, whatever is smaller. Sometimes, it is difficult to tell apart compound leaves from a shoot system with simple leaves: look for stipulae and/or axillary buds at the ground of the leaves: if only some possess these structures, the others are most likely leaflets of a compound leaf.simple (i)Non-divided leaf, but margin may be incised nearly to the ground inherited by family Betulaceae: simple
Leaf margin: (i)Structure of leaf margin (or that of a leaflet in case of compound leaves). Attention: Here we ask for the leaf margin, defined as all those dissections that separate the leaf for less than one third of its length or width, whatever is smaller. To be worked out: how to handle margin of pinnate leaves?serrate / dentate / crenulate (i)Margin saw-like or rounded teethed
example: Betula, Lophanthus (crenulate)
inherited by genus Betula: serrate / dentate / crenulate
Petiole: (i)Leaf divided into stalk (petiole) and blade.with (i)Leaves with petiole (stalk) inherited by family Betulaceae: with
Stipule: (i)Leaflets at the base of the petiole, these are smaller and of different shape.pair (i)A pair of free stipulae
example: Lathyrus, Trifolium
inherited by family Betulaceae: pair
Leaf colour upper side: (i)Shades of green on the leaf, upper side.green (i)Clear green
example: Tribulus terrestris
inherited by family Betulaceae: green
Leaf colour lower side: (i)Shades of green on the leaf, lower side.green (i)Clear green, in most species
example: Angelica decurrens
inherited by family Betulaceae: green
Leaf veination: (i)Arrangement of the main veins of a leaf.pinnate (i)One main vein, several side veins, sometimes inconspicuous
example: Cicerbita
inherited by family Betulaceae: pinnate
Flower (i)reproductive portion of the plant, consisting of sepals, petals, stamens, and pistils
Flower appearance and pollination: (i)General appearance of the flower.not attractive, wind-pollinated or some water plants (i)Small, colourless or green flowers
example: Betula, grasslike plants: Carex, Setaria, Juncus
inherited by family Betulaceae: not attractive, wind-pollinated or some water plants
Flower colour: (i)Attention: assess colour of the most colourful parts of the flower, but not of the stamens; be aware of single plants with a mutation (mostly white) on flower colour.colourless (i)Dry membranous inherited by family Betulaceae: colourless
Perianth arrangement: (i)Attention: in some plants, flowers may be dimorphic in different ways (dioecious or gynodioecious). If flowers vary, record the characters of the most showy flowers.absent or strongly reduced (i)No perianth leaves ensheathing stamen and/or carpels
example: Callitriche
inherited by family Betulaceae: absent or strongly reduced
Diameter of flower: (i)Diameter of flower or flower head. to 5 mm (i)
example: Aruncus
inherited by family Betulaceae:
Spur: (i)A hollow, slender, sac-like appendage of the perianth leaves, storing nectar.no spur (i)Flower without appendage
example: Peganum
inherited by family Betulaceae: no spur
Stamen number: (i)Attention: We ask for the reproductive organs of the flower dispersing pollen. Count only fully fertile stamens, not staminodia (e.g. Parnassia).2 (i)
example: Cypripedium
inherited by genus Betula: 2
5 (i)
example: Peucedanum
inherited by genus Betula: 5
Stamen fusion: (i)To which degree are the stamens fused? Attention: Whereas the pollen sacs itself are often free., their stalks (filaments) may be fused. Here, we count them as fused if they are together over at least one thirth of their length.free (i)Stamens with separate bases
example: Malus
inherited by family Betulaceae: free
Carpel number: (i)Number of carpels (carpel: forming a simple pistil or part of a compound pistil, modified leaf).2 inherited by family Betulaceae: 2
Carpel fusion: (i)To which degree are the carpels (modified leaf forming simple pistil or part of a compound pistil) fused.fused (i)Carpels united into an ovary, only styles are free
example: Malus, Berberis
inherited by family Betulaceae: fused
Ovary position: (i)For entirely or partly fused carpels, describe their position in relation to the insertion point of perianth leaves (best done by doing a longitudinal section of a flower).inferior (i)Ovary below the point where perianth leaves are inserted, always fused to an ovary
example: Vaccinum
inherited by family Betulaceae: inferior
Sex: (i)Distribution of male and female organs among flowers, only most commonly cases.unisexual (i)
example: Rhodiola
inherited by family Betulaceae: unisexual
monoecious (i)Male and female flowers at the same plant
example: Xanthium, Larix, Atriplex
inherited by family Betulaceae: monoecious
Inflorescence (i)flowering part of a plant, describes the arrangement of the flowers on the flowering axis
Inflorescence: (i)Structure of the inflorescence.Flowers in inflorescence (i)No solitary flowers inherited by family Betulaceae: Flowers in inflorescence
Appearance: (i)Outer look of the inflorescence.axillary (i)Usually several inflorescences in axillary shoots or single flowers in leaf axils, main shoot remains mostly leafy
example: Tragopogon, Aconogonon
inherited by family Betulaceae: axillary
Inflorescence type: (i)Types of inflorescence. Attention: We here ask for the botanical nomenclature of inflorescences, which is sufficiently complicated. Tick only, if you are certain, or tick all inflorescence types that appear similar of these of the plant in question.catkin (i)Mostly unisexual flowers, in pendulous spikes ore racemes, often falling as a whole after fruiting
example: Betula (male pendulous, female upward), Corylus (only male inflorescences, pendulous), Salix (strict upward), Populus (pendulous)
inherited by family Betulaceae: catkin
Fruit (i)the seed bearing organ, with or without adnate parts; a ripened ovary and any other structures which are attached and ripen with it. Aggregate fruits are handled like simple fruits for determination.
Consistency: (i)Fleshy fruits or dry fruits, see dispersal adaptations for further classification.dry (i)With a dry outer shell, no fleshy parts, but seed (embryo) could be edible inherited by family Betulaceae: dry
Type of fruit: (i)Common fruit types (including pseudocarp).Indehiscent fruits inherited by family Betulaceae: Indehiscent fruits
Solitary fruits (i) inherited by family Betulaceae: Solitary fruits
nut or nutlet (i)Dry fruit with a single, hard stone inside (and usually a large often edible embryo) inherited by family Betulaceae: nut or nutlet
Opening of fruit: (i)Mode of dehiscence at maturity to release seeds.not opening / indehiscent (i)Fruits remain closed at maturity and disperse with seeds inside
example: Corylus (nut), Vaccinium (berry)
inherited by family Betulaceae: not opening / indehiscent
Size of fruit: (i)Size of the fruit including appendage. to 5 mm (i)
example: Halerpestes: many folicles forming dry nutlets
inherited by family Betulaceae:
Dispersal: (i)Appearance of fruit or seed (if single) and adaptations to dispersal.Flying (wind dispersed) (i)Fruits or seeds with appendages to fly
example: Taraxacum, Atraphaxis, Pulsatilla
inherited by family Betulaceae: Flying (wind dispersed)
Seed number: (i)Estimate the number of seeds per fruit, if recognizable seeds are in the fruit (in rare cases a fruit may contain one seeded nuts: rose hip, carex).1 (i)A single seed (stone) or seed and fruit wall tightly connected
example: Prunus, Amygdalus: drupe
inherited by family Betulaceae: 1
Shoot/Stem (i)a young stem or branch
Cross section: (i)Shape of the cross section of a stem or shoot (look at first to second year shoots).round (i)Stem or shoot round
example: Allium
inherited by family Betulaceae: round
Spines, thorns or prickles: (i)Shoot with conspicuous spines, thorns or prickles.absent (i)Stem glabrous or hairy, but never with spines, thornes or prickles
example: Gentiana barbata
inherited by family Betulaceae: absent
Root / shoot below ground (i)plant part below ground (in most cases), including below ground shoots, without leaves
Root type: (i)Organisation of the roots.allorhizous (i)Plant with a conspicuous tap root, one larger tap root with side roots
example: Dicotyledonae
inherited by order Fagales: allorhizous
Distribution (i)region where the plant is likely to be found
Distribution (Veg. Zones): (i)acc. to Grubov 1952Khubsgul (i)In distribution data often named as '1'
Khentei (i)In distribution data often named as '2'
Khangai (i)In distribution data often named as '3'
Mongol-Daurian (i)In distribution data often named as '4'
Great Khingan (i)In distribution data often named as '5'
Middle Khalkha (i)In distribution data often named as '8'
acc. to: Gubanov 1996