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• Dichotomous Key
• Commelinaceae
• Tradescantia
• Tradescantia bracteata

Tradescantia bracteata — long-bracted spiderwort

Facts

Long-bracted spiderwort is a prairie plant from the Great Plains, and rarely a visitor to New England, where it has been collected in Massachusetts and Vermont in disturbed and cultivated areas.

Habitat

Anthropogenic (man-made or disturbed habitats), meadows and fields

Characteristics

• Clonal plantlets

  Axillary bulblets

  there are no bulblets being produced in axils

• Flowers

  Anther attachment

  the anther is attached by its base to the filament

  Anther color

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

  Bulblets replace flowers

  there are no bulblets where the flowers are located

  Carpels fused

  the carpels are fused (the number of carpels equals the number of locules)

  Filament surface

  the filament surface has rough hairs or scales on it

  Flower bracts

  there are bracts associated with the flower

  Flower orientation

  • the flowers curve or droop downwards
  • the flowers point upward or spread or curve outward

  Flower petal color

  • blue to purple
  • pink to red

  Flower petal length

  18–19 mm

  Flower shape

  • the flower is cup-shaped
  • the flower is flattened or platter-shaped

  Flower symmetry

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

  Form of style

  • the style is knob-like at the tip, and unbranched
  • the style is narrow at the tip and unbranched

  Fringed petal edges

  the petals are not fringed

  Hairs on flower stalk

  the flower stalk has hairs on it

  Inflorescence type

  the inflorescence is a dichasial cyme (an axis with a terminal flower, below it a pair of branches, each with a terminal flower, these branches may in turn have a pair of branches and so on)

  Length of flower stalk

  18–33 mm

  Marks on petals

  there are no noticeable marks on the petals

  Nectar spur

  the flower has no nectar spurs

  Number of carpels

  3

  Number of pistils

  1

  Number of sepals and/or petals

  there are six petals, sepals or tepals in the flower

  Number of styles

  1

  Ovary position

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

  Petal and sepal arrangement

  the flower includes two cycles of petal- or sepal-like structures

  Petal appearance

  the petals are thin and delicate, and pigmented (colored other than green or brown)

  Petal base

  the petal narrows gradually or does not narrow at the base

  Petal fusion

  the perianth parts are separate

  Petal hairs on inner/upper surface

  there are no hairs on the inner/upper petal surface

  Petal nectaries

  the petals do not have nectaries

  Sepal appearance

  the sepals resemble leaves in color and texture

  Sepal length

  10–13 mm

  Sepal orientation

  the sepals are slightly curved outwards from the plant

  Sepals fused only to sepals

  the sepals are separate from one another

  Spathe

  the plant has a spathe surrounding the flower spike

  Spathe form

  • NA
  • the spathe just wraps around the base of the spike of flowers

  Stamen number

  6

  Stamen position relative to petals

  NA

  Stamen types

  the stamens within a cycle are all similar

  Stamens fused

  the stamens are not fused to one another

  Stamens fused outwards

  the stamens are not fused to the petals or tepals

  Style petal-like

  the style is not broad and flattened like a petal

  Tepals

  the petals and sepals are different in size and color

• Fruits or seeds

  Berry color

  NA

  Capsule ridges

  there are three ribs or wings on the capsule

  Fruit compartments

  there are three locules in the fruit

  Fruit cross-section

  the fruit is round in cross-section

  Fruit length

  5–6 mm

  Fruit type (general)

  the fruit is dry and splits open when ripe

  Fruit type (specific)

  the fruit is a capsule (splits along two or more seams, apical teeth or pores when dry, to release two or more seeds)

  Other markings on berry

  NA

• Glands or sap

  Sap

  the sap is clear and watery

• Growth form

  Lifespan

  the plant lives more than two years

  Root septa

  the roots do not have transverse septa

  Underground organs

  there are only slender roots on the plant

• Leaves

  Hairs on underside of leaf blade

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

  Hairs on upper side of leaf blade

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

  Leaf arrangement

  alternate: there is one leaf per node along the stem

  Leaf blade basal lobes

  the leaf blades do not have basal lobes

  Leaf blade base

  the leaf blade clasps the stem at the base, or the leaf blade goes all the way around the stem, so that the stem appears to pierce the leaf blade

  Leaf blade base shape

  the base of the leaf blade is rounded

  Leaf blade bloom

  the underside of the leaf blade has no noticeable waxy or powdery bloom

  Leaf blade cross-section

  the leaf blade is more or less flat in cross-section

  Leaf blade faces

  both surfaces of the leaf blade are exposed

  Leaf blade form

  Fully-formed (i.e., expanded), +/- green leaf blades are found somewhere on the plant

  Leaf blade length

  150–290 mm

  Leaf blade orientation

  the upper surface of the leaf blade faces the stem of the plant

  Leaf blade shape

  • the leaf blade is lanceolate (lance-shaped; widest below the middle and tapering at both ends)
  • the leaf blade is linear (very narrow with more or less parallel sides)

  Leaf blade surface colors

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

  Leaf blade tip

  the tip of the leaf blade is acuminate (tapers to a long, thin point)

  Leaf blade veins

  the lateral veins are parallel or slightly arched in the direction of the tip

  Leaf blade width

  9–20 mm

  Leaf stalk length

  0 mm

  Leaf type

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

  Leaflet number

  0

  Stipule twining

  NA

  Stipules

  there are no stipules on this plant

• Place

  Habitat

  terrestrial

  New England state

  • Massachusetts
  • Vermont

  Specific habitat

  • man-made or disturbed habitats
  • meadows or fields

• Scent

  Plant odor

  the leaves have no particular smell

• Stem, shoot, branch

  Flowering stem growth form

  the flowering stem is held upright

  Flowering stem leaves

  there is at least one fully-formed leaf on the flowering stem

  Stem hairs

  • the stem has hairs on it
  • the stem is nearly or completely hairless

Wetland status

Usually occurs in non-wetlands, but occasionally in wetlands. (Wetland indicator code: FACU)

New England distribution and conservation status

From the dichotomous key of Flora Novae Angliae