| Class: | angiosperms |
| Order: | Rosales |
| Family: | Ulmaceae |
| Name acc. to: | APGII |
| Herbar: | list records    |
| Description: | Trees. Leave base asymmetric, stipules inconspicuous.
Small apetalous flowers in bunches/cymes, drooping on long pedicels. Fruits winged. |
| Link to Flora of China: | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=10928 |
| open map in a new window |  |
| genus: 1 |
| species: 3 |
| 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
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| Water or terrestrial plant: (i)Where do the plants grow? | terrestrial (i)Plant grows on dry land
example: Orostachys spinosa
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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
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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  
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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 
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| Shape of blade: (i)Easy for simple leaves. In compound leaves use the general shape of leaflet. Always check the ground for largest leaves of a plant. To be worked out: how to handle pinnate leaves? | elliptic (including ovate and obovate) (i)Elliptic: broadest at the middle and narrower at the two equal ends; ovate: egg-shaped, attached at the broad end; obovate: attached at the narrower end
example: Limosella aquatica 
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| Length of leaves: (i)How long is the leaf, be carefull in compound leaves, measure the complete leaf. | from 21 mm to 50 mm
more than 50 mm
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| Leaf apex: (i)Appearance of the tip of leaf resp. leaflets in compound leaves. | acuminate (i)Gradually tapering to a (sharp) point
example: Populus laurifolia? 
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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) 
finely serrate / dentate (i)Fine teeth, more than 20 per leaf length; usually only one lateral vein per tooth
example: Pedicularis 
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| Leaf base: (i)The angle the leaf blade forms with a real or imaginary (sessile leaves) petiole. Attention: Here, we consider only the base of leaves or leaflets (in case of compound leaves). | asymmetric (i)Base of leaf distinctly unequal
example: Ulmus 
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| Petiole: (i)Leaf divided into stalk (petiole) and blade. | with (i)Leaves with petiole (stalk) 
shorter than blade (i)Petiol shorter than leaf blade
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| Leaf colour upper side: (i)Shades of green on the leaf, upper side. | green (i)Clear green
example: Tribulus terrestris
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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
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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   
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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
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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. | greenish (i)petals absent or not distinctly different from colours of leaves, only stigmas (white) or anthers (yellow) may differ in color
example: Chenopodium, Triglochin
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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. | simple, similar (i)Only one type of perianth leaves (tepals)
example: Tulipa 
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| 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 
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| 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 
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| Petal / Tepal number: (i)Number of petal leaves (inner perianth leaves, usually coloured). | 4 (i)
example: Galium
5 (i)
example: Potentilla
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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
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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
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| Pistil number: (i)Number of pistils (female floral organs: style, if developed; stigma and carpels/ovary together build the pistil). | 1 (i)One carpel, but clearly one stigma
example: Pyrola, Primula, Alyssum
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| Carpel number: (i)Number of carpels (carpel: forming a simple pistil or part of a compound pistil, modified leaf). | 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
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| Style number: (i)Portion of the pistil connecting the stigma to the ovary. | 2
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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). | superior (hypogynous) (i)Base of carpels attached above insertion point of perianth leaves, carpels free or fused
example: Delphinium, Anemone  
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| 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
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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
Compound inflorescences (i)Flowers on shoots of higher orders (complex branched)
example: Solidago 
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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
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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. | others (in traits_comments nicht aufgeführt) (i)Not as above
example: Sparganium: globose capitate
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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
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| Type of fruit: (i)Common fruit types (including pseudocarp). | Indehiscent fruits
Solitary fruits (i)   
nut or nutlet (i)Dry fruit with a single, hard stone inside (and usually a large often edible embryo) 
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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
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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 Rosales: allorhizous
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