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Class:angiosperms
Group:monocotyledons
Order:Alismatales
Family:Alismataceae
EditorS. Rilke, January 2012
Name acc. to:APGII
Herbar:list records    scans available    habitat photo available    
Description:Radical leaves with a distinct petiole with an expanding sheathing base. Usually 3 tepals persistend in fruit and 3 are decidous. Inflorescence pyramidal paniculate. Fruit aggregate of numerous dried one-seeded follicles, capitate.
open map in a new windowtaxon distribution for   acc. to Geobotanical Regions of Mongolia by Grubov (1955)
genus: 2
species: 4
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

perennial (i)Living for several to many years, as opposed to annual and biennial
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

Water or terrestrial plant: (i)Where do the plants grow?aquatic, leaves floating (i)Plant submerged in water, but leaves and flowers above surface
example: Nuphar

water or swamp plant
plants in swamps, marshes or bogs, leaves rising above water (i)Semiaquatic; plant terrestrial, but restricted to wet or moistured environments with ground water at or near the surface
example: Phragmites communis

Leaf (i)expanded, usually photosynthetic organ of a plant (including phylloclades)
Leaf development: (i)Structure and development of leaves.flattened blade (i)Cross-section of lamina flat, plain
common leaf (i)Green, often divided in blade and petiole
example: Cotoneaster

Leaf arrangement: (i)Arrangement of leaves at the stem.basal rosette (i)Leaves positioned at the base of the stem; stem often without leaves, no visible internodes (but flowers often on erect stems, and these may have few leaves)
example: Limonium, Potentilla, Plantago; also used in Liliales with basaly crouwded leaves (Tofieldia, Zigadenus etc.)

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
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?lanceolate (i)Lance-shaped; much longer than wide, with the widest point in the middle or below
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?entire (i)Plain margin, not toothed
example: Iris

Petiole: (i)Leaf divided into stalk (petiole) and blade.with (i)Leaves with petiole (stalk)
Leaf veination: (i)Arrangement of the main veins of a leaf.parallel (i)Most veins arranged parallel to the length of leaf, mostly no pronounced main vein (usually in elongate to linear leaves)
example: Most Monocotyledonae, Plantago, Veratrum, a lot of Caryophyllaceae looks like that.

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

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

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

Petal / Tepal number: (i)Number of petal leaves (inner perianth leaves, usually coloured).6 (i)
example: Allium, Lilium, Dactylorhiza

Spur: (i)A hollow, slender, sac-like appendage of the perianth leaves, storing nectar.no spur (i)Flower without appendage
example: Peganum

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).6 (i)
example: Veratrum, Smelowskia, Juncus

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

Pistil number: (i)Number of pistils (female floral organs: style, if developed; stigma and carpels/ovary together build the pistil).3 (i)Three stigmas, usually in a triangle
example: Stellaria, Euphorbia, Campanula, Allium

Carpel fusion: (i)To which degree are the carpels (modified leaf forming simple pistil or part of a compound pistil) fused.free (i)Carpels entirely free
example: Geum, Aconitum

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

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.
Type of fruit: (i)Common fruit types (including pseudocarp).Solitary fruits (i)
follicle (i)A pod arising from a single carpel, opening along a single side (the inner suture to which the seeds are attached)
Dehiscent fruits (i)Fruits open along a longitudinale line (except silicula)
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

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.homorhizous (i)Many equal roots
example: Monocotyledonae
inherited by class: homorhizous