Utricularia intermedia — flat-leaved bladderwort

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 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 growth after flowering

  the calyx grows to cover or partially cover the fruit

  Calyx symmetry

  there is only one way to evenly divide the calyx (the calyx is bilaterally symmetrical)

  Carpels fused

  the carpels are fused to one another

  Cleistogamous flowers

  there are no cleistogamous flowers on the plan

  Corolla morphology

  • the flower has a concave, hood-like, upper lip
  • the flower has two prominent lips

  Corolla palate

  yes

  Corona lobe length

  0 mm

  Epicalyx

  • NA
  • the flower does not have an epicalyx

  Epicalyx number of parts

  0

  Filament surface

  the filament is smooth, with no hairs or scales

  Flower description

  the flower has a superior ovary, and lacks a hypanthium

  Flower length

  At least 1 mm

  Flower number

  2–5

  Flower orientation

  the flower points upwards or is angled outwards

  Flower petal color

  yellow

  Flower reproductive parts

  the flower has both pollen- and seed-producing parts

  Flower symmetry

  there is only one way to evenly divide the flower (the flower is bilaterally symmetrical)

  Flowers sunken into stem

  no

  Form of style

  the style is lobed at the tip, and unbranched

  Fringed petal edges

  the petals are not fringed

  Fused stamen clusters

  NA

  Fusion of sepals and petals

  the petals or the sepals are fused into a cup or tube

  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 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

  Interior flower disk

  the flower does not have an interior disc

  Length of flower stalk

  5–15 mm

  Marks on petals

  there are no noticeable marks on the petals

  Nectar spur

  the flower has one or more nectar spurs

  Number of branches in umbel

  0

  Number of carpels

  2

  Number of pistils

  1

  Number of sepals, petals or tepals

  • there are five petals, sepals, or tepals in the flower
  • there are three 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

  Perianth shape

  the perianth is another shape

  Petal and sepal arrangement

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

  Petal and sepal colors

  yellow

  Petal appearance

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

  Petal base

  NA

  Petal folds or pleats

  the petals of the flower do not have folds or plaits

  Petal hairs (Viola)

  NA

  Petal length

  10–16 mm

  Petal length relative to sepals

  the petals are longer than the sepals

  Petal number

  3–5

  Petal shape

  the petal outline is another shape

  Petal tip shape

  • the petal tip is lobed or fringed
  • the petal tip is retuse (with a blunt or rounded apex and a notch at the center)
  • the petal tip is rounded

  Petal tips (Cuscuta)

  NA

  Raceme attachment (Veronica)

  NA

  Reproductive system

  all the flowers have both carpels and stamens (synoecious)

  Scales inside corolla

  no

  Sepal and petal color

  the sepals are different from the petals

  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 auricles

  the sepals have no auricles

  Sepal color

  • green to brown
  • yellow

  Sepal length

  3–4 mm

  Sepal number

  2

  Sepal orientation

  • the sepals are pressed against the corolla, or jutting stiffly upward
  • the sepals are slightly curved outwards from the corolla

  Sepal relative length

  the sepal lobes are longer than the fused portion

  Sepal shape

  the sepal outline is ovate (widest below the middle and broadly tapering at both ends)

  Sepal tip shape

  • the sepal tip is acute (is sharply pointed)
  • the sepal tip is notched
  • the sepal tip is obtuse (is bluntly pointed)
  • the sepal tip is truncate (ends abruptly in a more or less straight line as though cut off)

  Sepal uniformity

  one or more of the sepals is much narrower or shorter than the others

  Sepals fused only to sepals

  the sepals are fused to each other (not other flower parts), at least near their bases

  Spur length

  Up to 12 mm

  Spur number

  1

  Stamen appendages

  stamen appendages are absent

  Stamen attachment

  • the stamens are attached at or near the bases of the petals or tepals
  • the stamens are attached at or near the bases of the petals or tepals

  Stamen number

  1 or 2

  Stamen relative length

  anything

  Stamens fused

  the stamens are not attached to one another

  Staminodes

  there are no staminodes on the flower

  Stigma position

  the stigmas are positioned at the tip of the style

  Style petal-like

  the styles are not petal-like

  Style relative length

  the stigma does not protrude beyond the mouth of the corolla

  Surface of ovary

  • the ovary surface has no points, bumps or wrinkles
  • the ovary surface is textured with tiny points, bumps or wrinkles

  Umbel flower reproductive parts

  NA

  Upper lip of bilabiate corolla

  • the upper lip of the bilabiate corolla has one lobe
  • the upper lip of the bilabiate corolla has two lobes

• Fruits or seeds

  Achene relative orientation

  NA

  Achene shape

  NA

  Achene surface (Polygonum)

  NA

  Achene type

  NA

  Berry color

  NA

  Capsule color (Viola)

  NA

  Capsule ribs

  the capsule has no prominent ribs or wings

  Capsule splitting

  NA

  Fruit (pyxis) dehiscence

  • NA
  • the pyxis splits above the middle
  • the pyxis splits on or near the middle

  Fruit cross-section

  the fruit is round in cross-section

  Fruit features (Brassicaceae)

  NA

  Fruit length

  2.5–3.5 mm

  Fruit locules

  one

  Fruit shape

  the fruit is spherical

  Fruit stalk orientation

  the fruits point upward or spread or curve outward

  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)

  Fruit width

  2.5–3.5 mm

  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

  Ovary stipe length

  0 mm

  Placenta arrangement

  the plant has free-central placentation, where the ovules develop on a central column in a compound ovary lacking septa or with septa at the base only

  Rows of seeds in fruit (Brassicaceae)

  NA

  Schizocarpic fruit compression

  NA

  Schizocarpic fruit segments

  0

  Seeds comose

  no hairs

  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

  • NA
  • 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 has stolons

  Lifespan

  the plant lives more than two years

  Parasitism

  insectivorous

  Plant color

  • the leaves or young stems of the plant are green
  • the plant lacks green pigments, even on the leaves or young stems

  Plants darken when dry

  no

  Spines on plant

  the plant has no spines

  Underground organs

  NA

• Leaves

  Bracteole edges

  NA

  Bracteole length

  0 mm

  Bracteole number (Apiaceae)

  0

  Bracteole shape

  NA

  Bracteoles

  there are no bracteoles on the plant

  Bracts in plantain (Plantago)

  NA

  Floral bracts

  the flower has one or more bracts associated with it

  Hooked hairs on underside of leaf

  no

  Inflated hairs on leaf

  the leaf blade does not have inflated hairs on it

  Leaf arrangement

  • alternate: there is one leaf per node along the stem
  • basal: the leaves are growing only at the base of the plant

  Leaf blade base

  • the leaf has a distinct leaf stalk (petiole)
  • the leaf has no stalk

  Leaf blade base shape

  the base of the leaf blade is cuneate (wedge-shaped, tapers to the base with relatively straight, converging edges), or narrow

  Leaf blade base symmetry

  the leaf blade base is symmetrical

  Leaf blade bloom

  the underside of the leaf has no noticeable bloom

  Leaf blade edges

  • NA
  • 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 primary vein pattern

  the secondary veins branch off at intervals from the primary vein

  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

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

  Leaf blade texture

  the leaf blade is herbaceous (has a leafy texture)

  Leaf blade vein pattern

  NA

  Leaf blade veins

  the leaf blade has one main vein running from the base towards the tip (it may or may not have secondary veins)

  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 sheath length

  0 mm

  Leaf spines

  there are no spines on the leaf edges

  Leaf stalk

  • the leaves have leaf stalks
  • the leaves have no leaf stalks, but attach directly to the stem

  Leaf stalk attachment to leaf

  • NA
  • the petiole attaches at the basal margin of the leaf blade

  Leaf stalk base

  • NA
  • the petiole base is narrow where it attaches to the stem

  Leaf stalk length

  At least 0 mm

  Leaf teeth and lobes

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

  Leaf tip

  the tip of the leaf blade is obtuse (bluntly pointed)

  Leaf tufts in axils

  there are no clusters of smaller leaves growing out of axils

  Leaf type

  the leaves are compound (made up of two or more discrete leaflets

  Leaf variation

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

  Leaflet petiolules

  • NA
  • the leaflets of the compound leaf lack petiolules

  Leaves per node

  there is one leaf per node along the stem

  Specific leaf type

  • the leaf has a row of two or more lobes on each side of the central axis
  • the leaf has a row of two or more lobes on each side of the central axis, and each lobe itself has rows of lobes on each side of the lobe's central axis
  • the leaf has lobes that radiate from the base, somewhat like a hand

  Stipels

  there are no stipels at the bases of the petiolules

  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
  • wetlands

  New England state

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

  Specific habitat

  • bogs
  • edges of wetlands
  • fens
  • in lakes or ponds
  • swamps

• Scent

  Plant odor

  the plant does not have much of a smell

• Stem, shoot, branch

  Branched tendrils

  NA

  Flowering stem cross-section

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

  Flowering stem width

  0.5–0.8 mm

  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

  the flowering stem has no leaves above the base

  Plant height

  5–30 cm

  Stem bloom

  there is no powdery or waxy film on the stem

  Stem orientation

  the stems are upright or angled outwards

  Stem spacing

  the plant is solitary, or a few plants are growing together

  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 only in wetlands. (Wetland indicator code: OBL)

In New England

From Flora Novae Angliae dichotomous key