| Class: | angiosperms |
| Order: | Fagales |
| Family: | Betulaceae |
| Genus: | Betula |
| Scientific name: | Betula rezniczenkoana (Litv.) Schischk. |
| Name acc. to: | Gubanov 1996 |
| Synonym: | B. microphylla var. rezniczenkoana (acc. to IPNI online) |
| Description: | Differs from B. microphylla by form of lateral lobes of floral scales only. |
| Confuse with: | B. microphylla |
| Comments: | FloraGREIF accessible material of Mongolia (HAL, GFW) does not include this species. |
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| Habitat: | Alkaline spring banks and small river valleys at mountain slopes, alkaline floodplain peashrub bushes and chee-grass communities (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 
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| Petiole: (i)Leaf divided into stalk (petiole) and blade. | with (i)Leaves with petiole (stalk)  inherited by family Betulaceae: with
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| Diameter of flower: (i)Diameter of flower or flower head. | to 5 mm (i)
example: Aruncus inherited by family Betulaceae:
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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
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| 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:
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| 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)
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| 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
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| 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
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| 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
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| 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
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| Distribution (i)region where the plant is likely to be found | |
| Distribution (Veg. Zones): (i)acc. to Grubov 1952 | Mongol-Daurian (i)In distribution data often named as '4' 
Khobdo (i)In distribution data often named as '6' 
Mongolian Altai (i)In distribution data often named as '7' 
Depression of Great Lakes (i)In distribution data often named as '10' 
Valley of Lakes (i)In distribution data often named as '11' 
Gobi-Altai (i)In distribution data often named as '13' 
acc. to: Gubanov 1996 |