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Class:	angiosperms
Order:	Rosales
Family:	Rosaceae
Genus:	Crataegus
Scientific name:	Crataegus dahurica Koehne ex Schneid.
Name acc. to:	Gubanov 1996
Herbar:	list records
Description:	Shrub or tree 2-6 m tall, with thin spines up to 2.5 cm long or without spines. Leaves oblong obovoid-rhombic, 2.5-5 cm long,1.5-3 cm broad, glabrous or sub- on both sides or with white hairs in corners between nerves underneath. Ovary with 2-4 styles, fruits red-orange, with 2-4 stones, 6-8 mm in diameter.
Confuse with:	C. sanguinea
Tax. Comments:	For differentiation to C. sanguinea mainly hairiness is used.
Link to Flora of China:	http://www.efloras.org/browse.aspx?flora_id=2&name_str=Crataegus+dahurica
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Habitat:	River valleys, floodplains, uremas, waterside shrubberies, pine forests (Grubov 2001).
Habit (i)general appearance of a plant
Growth form: (i)Herb, shrub, tree or climber.	herb (i)Herbaceous, erect plant, up to 2m high, mostly with a leafy shoot; if perennial, shoots die to the ground each season, shoots are not woody example: Artemisia pectinata inherited by genus Crataegus: herb perennial (i)Living for several to many years, as opposed to annual and biennial inherited by genus Crataegus: perennial shrub, subshrub or semishrub (i)Shrub, multi-stemmed, mostly (0.2) 0.5 - 5 m high, shoots woody up to the tip example: Caragana leucophloea inherited by genus Crataegus: shrub, subshrub or semishrub tree (i)Woody plant with a clear main trunk, at least 2-3 m tall example: Ulmus pumila inherited by genus Crataegus: tree
Size of plant: (i)Attention: use flowering or fruiting specimens to assess plant height (many biennial plants possess only a basal rosette in the first year).	from 1000 mm to 3000 mm inherited by genus Crataegus: more than 3000 mm inherited by genus Crataegus:
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 Rosaceae: 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 genus Crataegus: 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 Rosaceae: 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 genus Crataegus: 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 genus Crataegus: 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 Crataegus: serrate / dentate / crenulate lobed (i)Curved division, be aware of deeply lobed leaves than compare with palmatisected (character: leaf division) example: Crataegus, Dryas, Rubus humulifolius inherited by genus Crataegus: lobed
Petiole: (i)Leaf divided into stalk (petiole) and blade.	with (i)Leaves with petiole (stalk) inherited by genus Crataegus: 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 genus Crataegus: pair
Leaf colour upper side: (i)Shades of green on the leaf, upper side.	green (i)Clear green example: Tribulus terrestris inherited by genus Crataegus: 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 genus Crataegus: 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 genus Crataegus: 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.	attractive, animal-pollinated (i)attractive and coloured flowers, mostly large, attracting surely animals example: Trollius, Rosa, Chamaerhodos inherited by family Rosaceae: attractive, animal-pollinated
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.	double, different (i)Two types of perianth leaves, differently coloured (sepals: outer periant leaves, usually greenish, and petals: inner perianth leaves, usually coloured) example: Parnassia inherited by genus Crataegus: double, different
Flower symmetry: (i)Symmetry of the perianth leaves. Attention: to assess this character, look on sepals, petals and stamens, but neglect carpels and ovary.	radiary, regular (actinomorphic) (i)More than two axis of symmetry example: Saxifraga: 5; Iris: 3 inherited by family Rosaceae: radiary, regular (actinomorphic)
Flower form: (i)common forms of flowers ? Veronica	simple (flat) - Do not confuse with inflorescences as in some Asteraceae (i)Petals spread out, flower appearing flat example: Mollugo, Trientalis, Pulsatilla, Saxifraga inherited by family Rosaceae: simple (flat) - Do not confuse with inflorescences as in some Asteraceae
Sepal number: (i)Number of sepal leaves (outer perianth leaves, calyx leaves, mostly greenish). Attention, this character applies only for flowers separated in sepals and petals, thus excluding most monocots. Be aware of the bracts (involucral leaves) of Asteraceae flowerheads, do not qualify these as sepals! Be also aware in Rosaceae is often an epicalyx developed, in this case count all parts.	5 (i) example: Polemonium inherited by genus Crataegus: 5
Petal / Tepal number: (i)Number of petal leaves (inner perianth leaves, usually coloured).	5 (i) example: Potentilla inherited by genus Crataegus: 5
Petal / Tepal fusion: (i)To which degree are the petal leaves connected? Petals sympetalous.	free (i)all petal leaves separate from each other example: Anthriscus inherited by family Rosaceae: free
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 Rosaceae: 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).	> 10 (i) example: Nymphaea, Callianthemum, Rosa inherited by genus Crataegus: > 10
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 Rosaceae: free
Carpel number: (i)Number of carpels (carpel: forming a simple pistil or part of a compound pistil, modified leaf).	5 inherited by genus Crataegus: 5
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 genus Crataegus: inferior
Sex: (i)Distribution of male and female organs among flowers, only most commonly cases.	bisexual, hermaphrodite (i)All or nearly all flowers of a plant with male and female parts example: Haplophyllum, Chenopodium inherited by genus Crataegus: bisexual, hermaphrodite
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 genus Crataegus: Flowers in inflorescence
Appearance: (i)Outer look of the inflorescence.	terminal (i)Inflorescence is the highest point of the plant and may consist of a single flower only example: Cypripedium, Rhaponticum, Ligularia sibirica, Echinops inherited by genus Crataegus: terminal
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.	others (in traits_comments nicht aufgefÃ¼hrt) (i)Not as above example: Sparganium: globose capitate inherited by genus Crataegus: others (in traits_comments nicht aufgefÃ¼hrt)
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.	fleshy (i)Usually non dehiscent; with a fleshy (swollen because of a high water content) outer shell, flesh edible at least for animals example: Prunus, Amygdalus, Malus inherited by genus Crataegus: fleshy
Type of fruit: (i)Common fruit types (including pseudocarp).	pomelike fruit (i)Some (often about 5) fruitlets (follicles) surrounded by fleshy receptacle example: Malus, Crataegus, Cotoneaster inherited by genus Crataegus: pomelike fruit Aggregated fruits (i) inherited by genus Crataegus: Aggregated fruits
Dispersal: (i)Appearance of fruit or seed (if single) and adaptations to dispersal.	Fleshy, edible (i)At least parts with a soft tissue edible at least for some animals (not necessarily for humans) inherited by genus Crataegus: Fleshy, edible
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).	2-6 (i)2-6 single seeds, well recognizable example: Crataegus: few-seeded berry inherited by genus Crataegus: 2-6
Shoot/Stem (i)a young stem or branch
Spines, thorns or prickles: (i)Shoot with conspicuous spines, thorns or prickles.	spines or thornes (i)Sharp pointed woody structure originating from the plant (thornes derived from a reduced branch, spines from leaves) example: Prunus spinosa no in Mongolia inherited by genus Crataegus: spines or thornes
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 Rosales: allorhizous
Distribution (i)region where the plant is likely to be found
Distribution (Veg. Zones): (i)acc. to Grubov 1952	Khentei (i)In distribution data often named as '2' Mongol-Daurian (i)In distribution data often named as '4' Great Khingan (i)In distribution data often named as '5' East Mongolia (i)In distribution data often named as '9' acc. to: Gubanov 1996