Bloom Clock/Keys/Southeastern Pennsylvania/September/Yellow Flowers

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The plants pictured below have been recorded as blooming during the month of September in Southeastern Pennsylvania.


Solidago canadensis

Inflorescence and habit

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Profile for Solidago canadensis (Canada Goldenrod)
Identifying Characteristics
Habit:Erect, colonizing herbaceous plant
Flowers:Yellow heads held on compound panicles
Foliage:Simple
Life Cycle: Perennial
Similar Plants:Solidago gigantea (shoot axis without hairs)
Recent Logs[edit]

Global data:


Rudbeckia hirta

Flowering plant

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Profile for Rudbeckia hirta (Gloriosa Daisy)
Identifying Characteristics
Habit:Upright herbaceous plant
Flowers:Heads with brown disk florets and yellow or orange rays
Stem:Hairy
Life Cycle: Perennial
Similar Plants:easily confused with Rudbeckia fulgida
Recent Logs[edit]


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Global data:
Temperate zone season(s): Early Summer, Mid Summer, Late Summer, Early Fall, Late Fall


Oxalis stricta

Flowers and foliage

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Profile for Oxalis stricta (Common Yellow Woodsorrel)
Identifying Characteristics
Habit:Upright
Flowers:5 petals, yellow
Foliage:Trifoliate, leaflets heart-shaped
Stem:Slender, green
Fruit:Explosive capsules
Life Cycle: Annual
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer, Early Fall, Mid Fall, Late Fall


Oenothera

Flower of O. macrocarpa

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Profile for Oenothera (Evening Primrose)
Identifying Characteristics
Habit:Erect
Flowers:Yellow, 4 petals
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Summer, Late Summer, Early Fall, Mid Fall, Late Fall


Impatiens capensis

Flowers and foliage

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Profile for Impatiens capensis (Jewelweed)
Identifying Characteristics
Habit:Erect
Growing Conditions:Moist soils
Fruit:Explosive capsules
Life Cycle: Annual
Recent Logs[edit]

Global data:
Temperate zone season(s): Early Summer, Mid Summer, Late Summer, Early Fall


Hemerocallis

Flower of H. fulva, one of the most commonly encountered daylilies

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Profile for Hemerocallis (Daylily)
Identifying Characteristics
Habit:clumping herbaceous plant
Flowers:3 petals and 3 sepals nearly equal. Each flower lasts only one day.
Foliage:Basal, straplike
Life Cycle: Perennial
Recent Logs[edit]

Global data:
Temperate zone season(s): Early Summer, Mid Summer, Late Summer, Early Fall


Chelidonium majus

Flowers, foliage, and buds

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Profile for Chelidonium majus (Greater Celandine)
Identifying Characteristics
Habit:Upright herbaceous plant
Flowers:4 showy petals, many anthers, yellow.
Foliage:Pinnately compound with lobed leaflets.
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer, Early Fall


Tagetes patula

Heads

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Profile for Tagetes patula (French Marigold)
Identifying Characteristics
Recent Logs[edit]

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Miscanthus sinensis

Florets

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Profile for Miscanthus sinensis (Miscanthus)
Identifying Characteristics
Recent Logs[edit]


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Viola x wittrockiana

A Purple-flowered variety

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Profile for Viola x wittrockiana (Pansy)
Identifying Characteristics
Habit:Short-lived, low-growing perennial, with mostly cool season blooms
Higher taxa:Viola


Recent Logs[edit]

Global data:
Temperate zone season(s): Early Spring, Mid Spring, Mid Summer, Early Fall, Mid Fall, Late Fall, Early Winter


Tanacetum vulgare

Heads

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Profile for Tanacetum vulgare (Tansy)
Identifying Characteristics
Habit:upright herbaceous plant
Flowers:Yellow heads, mostly discoid, on branched inflorescences
Life Cycle: perennial
Recent Logs[edit]


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Agrimonia

Flowers of A. eupatoria

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Profile for Agrimonia (Agrimony)
Identifying Characteristics
Recent Logs[edit]

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Oxalis corniculata

Plant with flowers, showing the purple foliage

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Profile for Oxalis corniculata (Creeping Woodsorrel)
Identifying Characteristics
Habit:Creeping, rooting at the nodes
Flowers:Yellow, 5-petaled
Foliage:Trifoliate with heart-shaped leaflets, usually purple
Fruit:Explosive capsules
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer, Early Fall, Mid Fall


Coreopsis verticillata

Plant in full flower

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Profile for Coreopsis verticillata (Threadleaf Coreopsis)
Identifying Characteristics
Habit:Colonizing herbaceous perennial
Flowers:Heads
Foliage:Narrow
Life Cycle: Perennial
Recent Logs[edit]

Global data:


Dahlia

Flower of cv. 'Autumn Fairy'

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Profile for Dahlia (Dahlia)
Identifying Characteristics
Recent Logs[edit]


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Corydalis lutea

Flowers and foliage

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Profile for Corydalis lutea (Yellow Corydalis)
Identifying Characteristics
Habit:Mound-forming, colonizing herbaceous plant
Flowers:Tubular, spurred, yellow
Foliage:Pinnately compound, somewhat glaucus
Stem:Weak, sappy
Fruit:Explosive pods
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer, Early Fall, Mid Fall, Late Fall, Early Winter


Solidago

Flowers on S. Gigantea

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Profile for Solidago (Goldenrod)
Identifying Characteristics
Subclass plants:Solidago canadensis, Solidago gigantea


Recent Logs[edit]

Global data:
Temperate zone season(s): Late Summer, Early Fall, Mid Fall, Late Fall, Early Winter


Taraxacum officinale

Head

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Profile for Taraxacum officinale (Common Dandelion)
Identifying Characteristics
Habit:rosette-forming herbaceous plant with a long taproot
Flowers:Head, flowers are all ray-like
Foliage:Basal only, pinnately lobed
Stem:flower stems are hollow with a milky sap
Scent:mild, "sunny"
Growing Conditions:sunny and partly-shaded, well drained soils, drought intolerant
Fruit:achene with a silky pappus
Similar Plants:Hypochoeris radicata, Sonchus
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Winter, Late Winter, Early Spring, Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer, Early Fall, Mid Fall, Late Fall, Early Winter


Asclepias curassavica

Inflorescence

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Profile for Asclepias curassavica (Milkweed)
Identifying Characteristics
Recent Logs[edit]

Global data:
Temperate zone season(s): Early Summer, Mid Summer, Late Summer, Early Fall


Digitalis lutea

Spike

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Profile for Digitalis lutea (Yellow Foxglove)
Identifying Characteristics
Habit:Upright herbaceous plant
Flowers:On spikes, tubular and yellow
Foliage:Simple
Life Cycle: Perennial
Recent Logs[edit]

Global data:


Helianthus x laetiflorus

Head

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Profile for Helianthus x laetiflorus (Sunflower)
Identifying Characteristics
Habit:erect, clump-forming
Recent Logs[edit]

Global data:
Temperate zone season(s): Mid Summer, Late Summer, Early Fall, Mid Fall


Lonicera japonica

Flowers and foliage

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Profile for Lonicera japonica (Japanese Honeysuckle)
Identifying Characteristics
Habit:Twining vine
Flowers:In terminal clusters, tubular, white or yellow (both colors often appearing on the same plant)
Foliage:Simple, opposite
Scent:Flowers are sweetly scented
Life Cycle: Woody perennial
Recent Logs[edit]

Global data:
Temperate zone season(s): Early Summer, Mid Summer, Late Summer, Early Fall, Mid Fall, Late Fall


Ambrosia trifida

Botanical drawing

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Profile for Ambrosia trifida (Giant Ragweed)
Identifying Characteristics
Flowers:Minute heads on dense spikes. Yellow, but appear green from a distance.
Foliage:Rough-textured
Life Cycle: Perennial
Recent Logs[edit]

Global data:


Helianthus annuus

Head

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Profile for Helianthus annuus (Sunflower)
Identifying Characteristics
Recent Logs[edit]

Global data:


Tagetes erecta

Head

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Profile for Tagetes erecta (Marigold)
Identifying Characteristics
Recent Logs[edit]

Global data:
Temperate zone season(s): Early Summer Mid Summer, Early Fall


Pilea pumila

early flowers

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Profile for Pilea pumila (Clearweed)
Identifying Characteristics
Recent Logs[edit]

Global data:


Rudbeckia laciniata

Heads

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Profile for Rudbeckia laciniata (Greenheaded Coneflower)
Identifying Characteristics
Habit:Erect herbaceous plant
Flowers:heads
Foliage:deeply lobed on lover leaves, unlobed on upper leaves
Growing Conditions:most common in moist to wet soils
Life Cycle: perennial
Recent Logs[edit]


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Global data:


Acalypha rhomboidea

Flowering plant

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Profile for Acalypha rhomboidea (Common Three-seeded mercury)
Identifying Characteristics
Flowers:Tiny yellow flowers grow in leaf axils. Four sepals, female flowers are apetalous.
Foliage:Thin, lanceolate leaves with crenate margins. Dark green above, purplish below.
Stem:erect.
Life Cycle: Annual
Recent Logs[edit]


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Global data:
Temperate zone season(s): Mid Summer, Late Summer, Early Fall


Rorippa sylvestris

Plant in bloom

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Profile for Rorippa sylvestris (Field Yellowcress)
Identifying Characteristics
Habit:Spreading herb
Flowers:Corymbs of yellow flowers, 4 yellow petals
Foliage:Pinnatifid, dark green
Stem:Purplish, flexible
Scent:mild, mustard-like
Similar Plants:Can be mistaken for Barbarea vulgaris or Barbarea verna
Recent Logs[edit]

Global data:
Temperate zone season(s): Late Spring, Early Summer, Mid Summer, Late Summer, Early Fall, Mid Fall, Late Fall


Duchesnea indica

Duchesnea indica7.jpg

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Profile for Duchesnea indica (Mock Strawberry)
Identifying Characteristics
Habit:Creeping herbaceous plant
Flowers:5 yellow petals
Foliage:Trifoliate, roughly haired, dark green
Fruit:Strawberry-like but with red seeds
Life Cycle: Perennial
Recent Logs (flowers)[edit]


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Global data:
Temperate zone season(s): Mid Spring, Late Spring, Early Summer, Mid Summer, Early Fall, Mid Fall, Late Fall


Bidens frondosa

Flowering plant

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Profile for Bidens frondosa (Devil's Stickseed)
Identifying Characteristics
Flowers:small heads with yellow ray florets
Recent Logs[edit]

Global data:


Rudbeckia fulgida

Plant covered in flowers

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Profile for Rudbeckia fulgida (Blackeyed Susan, Orange Coneflower)
Identifying Characteristics
Habit:colonizing herbaceous plant
Flowers:Heads with cone-shaped black disks and orange rays
Foliage:simple, rough to the touch
Stem:Freely branching
Life Cycle: perennial
Similar Plants:Sometimes confused with Rudbeckia hirta
Recent Logs[edit]

Global data:


Euthamia graminifolia

Flowering plant

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Profile for Euthamia graminifolia (Grass-leaves goldenrod)
Identifying Characteristics
Habit:erect, clump-forming forb
Flowers:flat-topped terminal clusters of small yellow heads
Recent Logs[edit]

Global data:


Rudbeckia triloba

Flowers covering plant

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Profile for Rudbeckia triloba (Browneyed Susan)
Identifying Characteristics
Habit:upright forb, freely branching
Recent Logs[edit]


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Global data:



last updated 12:41, 13 October 2007 (UTC) with 33 plants