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• Amaranthaceae
• Atriplex
• Atriplex prostrata

Atriplex prostrata — hastate-leaved orache

Facts

Hastate-leaved orache has a patchy distribution across North America, and most of its range probably consists of introduced plants. However, plants inhabiting the east coast of the United States, including New England, are probably native.

Habitat

Anthropogenic (man-made or disturbed habitats), brackish or salt marshes and flats, coastal beaches (sea beaches), marshes

Characteristics

• Clonal plantlets

  Bulbils

  the plant does not appear to have bulbils

  Bulblets replace flowers

  there are no bulblets where the flowers are located

• Flowers

  Anther attachment

  the anther is attached near its midpoint to the filament

  Anther color

  the anthers show no hint of a pink, reddish or purplish tint

  Anther length

  0.2–0.3 mm

  Anther opening

  the anthers have narrow slits or furrows that run lengthwise along the anthers

  Anther spurs

  the anthers do not have spurs on them

  Calyx symmetry

  • NA
  • there are two or more ways to evenly divide the calyx (the calyx is radially symmetrical)

  Carpels fused

  the carpels are fused to one another

  Cilia on petals

  NA

  Cleistogamous flowers

  there are no cleistogamous flowers on the plan

  Corolla morphology

  NA

  Corolla palate

  NA

  Corona lobe length

  0 mm

  Epicalyx

  the flower does not have an epicalyx

  Epicalyx number of parts

  0

  Filament length

  0.2–0.4 mm

  Filament surface

  the filament is smooth, with no hairs or scales

  Flower description

  • NA
  • the flower has a superior ovary, and lacks a hypanthium

  Flower petal color

  NA

  Flower reproductive parts

  the flower has either only pollen- or only seed-producing parts

  Flower symmetry

  there are two or more ways to evenly divide the flower (the flower is radially symmetrical)

  Flowers sunken into stem

  no

  Form of style

  the style is branched above the base

  Fringed petal edges

  NA

  Fused stamen clusters

  NA

  Hairs on inflorescence

  the axis of the inflorescence has no hairs on it

  Horns in hoods (Asclepias)

  NA

  Hypanthium

  the flower does not have a hypanthium

  Hypanthium length

  0 mm

  Inflorescence length

  20–90 mm

  Inflorescence one-sided

  the flowers are arrayed in a spiral around the inflorescence axis or branches, or occur singly, or in several ranks

  Inner tepals (Rumex)

  NA

  Marks on petals

  NA

  Nectar spur

  the flower has no nectar spurs

  Number of branches in umbel

  0

  Number of carpels

  2–3

  Number of pistils

  1

  Number of sepals, petals or tepals

  • there are five petals, sepals, or tepals in the flower
  • there are no petals, sepals, or tepals in the flower, or they are not clearly present

  Number of styles

  2

  Ovary position

  the ovary is above the point of petal and/or sepal attachment

  Petal and sepal arrangement

  • the flower includes neither petals nor sepals
  • the flower includes only one cycle of petals or sepals

  Petal and sepal colors

  • NA
  • green to brown

  Petal appearance

  NA

  Petal base

  NA

  Petal folds or pleats

  NA

  Petal glandular dots or scales

  NA

  Petal hairs (Viola)

  NA

  Petal hairs on inner/upper surface

  NA

  Petal length

  0 mm

  Petal length relative to sepals

  NA

  Petal nectaries

  NA

  Petal number

  0

  Petal shape

  NA

  Petal tip shape

  NA

  Petal tips (Cuscuta)

  NA

  Petal width

  0 mm

  Raceme attachment (Veronica)

  NA

  Reproductive system

  each flower has only carpels or only stamens, but both types of flower are present on each plant (monoecious)

  Scales inside corolla

  NA

  Sepal and petal color

  NA

  Sepal appearance

  the sepals are green or brown, and leaf-like in texture

  Sepal appendages

  the sepals do not have appendages on them

  Sepal appendages (Oenothera)

  NA

  Sepal color

  green to brown

  Sepal length

  0.3–0.4 mm

  Sepal number

  0–5

  Sepal shape

  • the sepal outline is oblong (rectangular, but with rounded ends)
  • the sepal outline is obovate (egg-shaped, but with the widest point above the middle of the leaf blade)

  Sepal texture

  the sepals are thin and dry, paperlike

  Sepal tip shape

  the sepal tip is acute (is sharply pointed)

  Stamen attachment

  the stamens are not attached to the petals or tepals

  Stamen length

  0.4–0.7 mm

  Stamen number

  5

  Stamen relative length

  anything

  Stamens fused

  the stamens are not attached to one another

  Staminodes

  there are no staminodes on the flower

  Stigma length

  0.2–0.3 mm

  Style petal-like

  the styles are not petal-like

  Umbel flower reproductive parts

  NA

  Upper lip of bilabiate corolla

  NA

• Fruits or seeds

  Achene relative orientation

  the achenes are perpendicular to the plane of the perianth (vertical)

  Achene shape

  the achenes are circular in outline

  Achene surface (Polygonum)

  NA

  Achene type

  the fruit is an achene (dry, indehiscent, and usually one-seeded)

  Berry color

  NA

  Capsule color (Viola)

  NA

  Capsule ribs

  NA

  Capsule splitting

  NA

  Fruit (pyxis) dehiscence

  NA

  Fruit cross-section

  the fruit is at least somewhat flattened

  Fruit features (Brassicaceae)

  NA

  Fruit length

  1–2.5 mm

  Fruit locules

  one

  Fruit shape

  • the fruit is flat or strongly compressed
  • the fruit is spherical

  Fruit type (general)

  the fruit is dry but does not split open when ripe

  Fruit type (specific)

  the fruit is an achene (dry, usually one-seeded, does not separate or split open at maturity)

  Legumes (Fabaceae)

  NA

  Mericarp length

  0 mm

  Mericarp segment shape (Desmodium)

  NA

  Other markings on berry

  NA

  Ovary stipe

  the ovary or fruit does not have a stipe

  Placenta arrangement

  the plant has basal placentation, where one or a few ovules develop at the base of a simple or compound ovary

  Rows of seeds in fruit (Brassicaceae)

  NA

  Schizocarpic fruit compression

  NA

  Schizocarpic fruit segments

  0

  Seed length

  1–2.5 mm

  Seed number

  1

  Seed relative length

  the seed is about as long as it is wide

  Seed surface

  the seed is smooth or without clear markings

  Septum in fruit (Brassicaceae)

  NA

  Wings on fruit

  the fruit does not have wings on it

  prickles on fruits

  the fruits do not have thorn-like defensive structures

• Glands or sap

  Glands on leaf blade

  the leaf blades do not have glandular dots or scales

  Sap

  the sap is clear and watery

  Sap color

  the sap is clear

• Growth form

  Growth form

  the plant is an herb (it has self-supporting stems)

  Horizontal rooting stem

  the plant does not have stolons

  Lifespan

  the plant lives only a single year or less

  Parasitism

  the plant is not parasitic

  Plant color

  the leaves or young stems of the plant are green

  Spines on plant

  the plant has no spines

  Underground organs

  there is a thickened taproot on the plant

• Leaves

  Bracteole edges

  the bracteole margins are entire (without teeth, lobes or hairs)

  Bracteole length

  3–5 mm

  Bracteole number (Apiaceae)

  0

  Bracteole shape

  • the bracteoles are another shape than those given
  • the bracteoles are ovate (widest below the middle, and broadly tapering to both ends--egg-shaped)
  • the bracteoles are triangular (the base is on one of the three roughly straight sides)

  Bracteoles

  the plant has bracteoles between the primary bracts and the flowers

  Bracts in plantain (Plantago)

  NA

  Final leaf segment length (compound lvs only)

  0 mm

  Final leaf segment length to width ratio (compound lvs only)

  0

  Final leaf segment width (compound lvs only)

  0 mm

  Floral bract texture

  the floral bracts are green, with a leaf-like texture

  Floral bracts

  • the flower does not have bracts
  • the flower has one or more bracts associated with it

  Flower bract length

  Up to 30 mm

  Hairs on underside of leaf

  the underside of the leaf is not hairy, or it has very few hairs

  Hairs on upper side of leaf

  the upper side of the leaf is not hairy, or it has very few hairs

  Hooked hairs on underside of leaf

  no

  Inflated hairs on leaf

  the leaf blade has inflated hairs on it

  Leaf arrangement

  • alternate: there is one leaf per node along the stem
  • opposite: there are two leaves per node along the stem

  Leaf blade base

  the leaf has a distinct leaf stalk (petiole)

  Leaf blade base shape

  • the base of the leaf blade is cordate (heart-shaped, has rounded lobes at the base)
  • the base of the leaf blade is truncate (ends abruptly in a more or less straight line as though cut off)

  Leaf blade bloom

  the underside of the leaf has no noticeable bloom

  Leaf blade edges

  • the edge of the leaf blade has teeth
  • the edge of the leaf blade is entire (has no teeth or lobes)

  Leaf blade flatness

  the leaf is flat (planar) at the edges

  Leaf blade hairs

  NA

  Leaf blade length

  20–100 mm

  Leaf blade primary vein pattern

  the secondary veins branch off at intervals from the primary vein

  Leaf blade shape

  • the leaf blade is hastate (halberd-shaped; with slightly sunken sides, and outward-pointing basal lobes)
  • the leaf blade is triangular, with the stalk or attachment point on one of the sides

  Leaf blade surface colors

  the upper side of the leaf blade is relatively uniform in color

  Leaf blade vein pattern

  the major veins of the leaf blade branch, but do not rejoin

  Leaf blade width

  40–100 mm

  Leaf duration

  the leaves drop off in winter (or they whither but persist on the plant)

  Leaf form

  the leaves are green, with an expanded blade and a leaf-like texture

  Leaf hair orientation

  NA

  Leaf spines

  there are no spines on the leaf edges

  Leaf stalk

  the leaves have leaf stalks

  Leaf stalk attachment to leaf

  the petiole attaches at the basal margin of the leaf blade

  Leaf stalk base

  the petiole base is narrow where it attaches to the stem

  Leaf stalk length

  0–40 mm

  Leaf teeth and lobes

  • the edge of the leaf blade is entire (has no teeth or lobes)
  • the leaf blade margin has forward-pointing teeth
  • the leaf blade margin has outward-pointing teeth

  Leaf tip

  • the tip of the leaf blade is acute (sharply pointed)
  • the tip of the leaf blade is obtuse (bluntly pointed)

  Leaf type

  the leaves are simple (i.e., lobed or unlobed but not separated into leaflets)

  Leaf types

  There is a gradual change in appearance of the leaves from the base (or near the base) of the plant to those from further up on the stem, with leaves progressively changing as one moves higher on the stem (often becoming shorter, or less toothed/lobed, and/or with shorter petioles).

  Leaf variation

  the leaves are nearly similar in size, prominence of teeth, and length of stalks throughout the stem

  Leaflet number

  0

  Leaflet petiolules

  NA

  Leaves per node

  • there are two leaves per node along the stem
  • there is one leaf per node along the stem

  Pinnately compound leaf type

  NA

  Specific leaf type

  the leaves are simple (i.e., lobed or unlobed but not separated into leaflets)

  Stipels

  NA

  Stipule edges

  NA

  Stipule features

  NA

  Stipule fused to leaf stalk

  NA

  Stipule length

  0 mm

  Stipule shape

  NA

  Stipules

  there are no stipules on the plant

• Place

  Habitat

  • aquatic
  • terrestrial
  • wetlands

  New England state

  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont

  Specific habitat

  • brackish or salt marshes and flats
  • man-made or disturbed habitats
  • marshes
  • sea beaches

• Stem, shoot, branch

  Branched tendrils

  NA

  Direction of stem hairs

  NA

  Flowering stem cross-section

  the flowering stem is circular, or with lots of small angles so that it is roughly circular

  Hair between stem nodes

  the stem has no hairs between the nodes

  Hairs between stem nodes

  the stem has no hairs between the nodes

  Hooked hairs on stem between nodes

  no

  Leaves on stem

  there is at least one full leaf above the base of the flowering stem

  Length of hairs between stem nodes

  0 mm

  Plant height

  10 cm

  Stem hair distribution

  NA

  Stem orientation

  • the stems are upright or angled outwards
  • the stems trail at the base, but may turn upwards at the tips

  Stem roughness between nodes

  • the stem does not feel rough
  • the stem feels rough due to hairs or prickles

  Stem succulence

  the stems are not succulent

  Tendril origin

  NA

  Tendrils

  the plant does not have tendrils

  Wings on stem

  the stem does not have wings on it

Wetland status

Occurs in wetlands or non-wetlands. (Wetland indicator code: FAC)

New England distribution and conservation status

From the dichotomous key of Flora Novae Angliae