| Class: | angiosperms |
| Order: | Fabales |
| Family: | Fabaceae |
| Genus: | Pisum |
| Scientific name: | Pisum arvense L. |
| Name acc. to: | Gubanov 1996 |
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| Habitat: | Weed in crops (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 Pisum: herb
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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 Fabaceae: no parasite/saprophyte
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| Leaf (i)expanded, usually photosynthetic organ of a plant (including phylloclades) | |
| 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 Fabaceae: 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. | paripinnate / evenpinnate (i)A pinnate leaf with all leaflets in pairs inherited by genus Pisum: paripinnate / evenpinnate
compound (i)Composed of several similar parts inherited by genus Pisum: compound
pinnate (i)With leaflets on both sides of an axis, at least 2 pairs or more
example: Onobrychis  inherited by genus Pisum: pinnate
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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 Fabaceae: pair
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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 Fabaceae: 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. | attractive, animal-pollinated (i)attractive and coloured flowers, mostly large, attracting surely animals
example: Trollius, Rosa, Chamaerhodos inherited by family Fabaceae: attractive, animal-pollinated
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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. | white (i)Most plants of the population white
example: Pleurospermum, Maianthemum inherited by genus Pisum: white
pink (i)Between red and white
example: Centaurium inherited by genus Pisum: pink
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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. | 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 family Fabaceae: double, different
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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. | zygomorphic (i)One axis of symmetry, monosymmetrical flowers
example: Pedicularis, Nepeta, Viola    inherited by family Fabaceae: zygomorphic
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| Flower form: (i)common forms of flowers ? Veronica | papilionaceous (i)Butterfly-like flower is structured: standard, 2 wings and keel
example: Most Fabaceae (Astragalus), Polygala    inherited by family Fabaceae: papilionaceous
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| 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 family Fabaceae: 5
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| Sepal fusion: (i)To which degree are the sepal leaves connected? 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! | fused (i)Leaves united, only tips are free
example: Fabaceae, Silene   inherited by family Fabaceae: fused
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| Petal / Tepal number: (i)Number of petal leaves (inner perianth leaves, usually coloured). | 5 (i)
example: Potentilla inherited by family Fabaceae: 5
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| 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 Fabaceae: free
fused (i)petal leaves united, only tips are free (gamopetalous, sympetalous)
example: Linnaea, Adenophora, Stellera inherited by family Fabaceae: fused
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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 Fabaceae: 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). | 10 (i)
example: Silene inherited by family Fabaceae: 10
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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. | fused with each other (i)All or most stamens fused with each other to a tube-like structure
example: Caragana, Petasites inherited by family Fabaceae: fused with each other
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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 inherited by family Fabaceae: 1
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| Style number: (i)Portion of the pistil connecting the stigma to the ovary. | 1 inherited by family Fabaceae: 1
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| Stigma number per style: (i)Number of stigmas per style. | 1 (i)One stigma, sessile or with a developed style inherited by family Fabaceae: 1
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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   inherited by family Fabaceae: superior (hypogynous)
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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. | |
| Type of fruit: (i)Common fruit types (including pseudocarp). | Solitary fruits (i)    inherited by family Fabaceae: Solitary fruits
Dehiscent fruits (i)Fruits open along a longitudinale line (except silicula) inherited by family Fabaceae: Dehiscent fruits
legume (a special form of pod) (i)Dry to slightly fleshy fruit, formed of a single carpel, opening along one line only, without remaining wall
example: Fabaceae, Pea  inherited by family Fabaceae: legume (a special form of pod)
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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 Fabales: allorhizous
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| Distribution (i)region where the plant is likely to be found | |
| Distribution (Veg. Zones): (i)acc. to Grubov 1952 | Khangai (i)In distribution data often named as '3' 
Mongol-Daurian (i)In distribution data often named as '4' 
acc. to: Gubanov 1996 |
| Distribution Khangay: (i)acc. Flora Khangaya 1989 | III
IV
V
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