Asiatic Dayflower (Commelina Communis)

Flower #1

Poorly zoomed picture of Asiatic Dayflower

Stem and Plant of Asiatic Dayflower

This flower was found on the outskirts of woodland park, along the street (Glen Echo Park)

It is on page 40 in Newcomb’s Wildflowers.

Common name Asiatic Dayflower ‚ Scientific name: Commelina communis

Corolla: 3 separate petals‚ 2 blue on top one white on bottom

Calyx: 3 separate sepals

Androecium: 3 separate stamens

Gynoecium type: Syncarpous, 3 carpels
Hard to tell with dissection of the ovary. Guess based on the number of stamens.

Flower type/ovary position: Hypogynous

Flower symmetry: Zygomorphic (irregular) symmetry

Additional distinctive features: Blue flowers blooming for one day __________________________________________________________________________________

Virginia Knotweed (Tovara virginiana)

Flower #2

Virginia Knotweed aka Jumpseed

Tiny Virginia Knotweed Flower

This flower was found along a woody park trail (Glen Echo Park)

It is on page 130 in Newcomb’s Wildflowers.

Common name: Virginia Knotweed, Scientific name: Tovara virginiana

Corolla: 4 separate petals

Calyx: No apparent sepals

Androecium: 4 stamens plus one unknown structure to the side

Gynoecium type: Unicarpellate, one carpel.

Difficult to see ovaries themselves much less any sort of chambers within ovaries.

Flower type/ovary position: Perigynous

Flower symmetry: actinomorphic (regular)

Additional distinctive features: Spike infloresence __________________________________________________________________________________

White Snakeroot (Eupatorium rugosum)

Flower #3

White Snakeroot

This flower was found along a woody park trail (Glen Echo Park)

It is on page 92 in Newcomb’s Wildflowers.

Name White Snakeroot (Eupatorium rugosum)

Corolla: 5 petals, either seperate or fused and deeply lobed

Calyx: No apparent sepals. Petals and sepals indistinguishable.

Adroecium: 2 separate stamens

Gynoecium type: Unicaprellate, one carpel. Upon dissection, no apparent chambers within ovary.

Flower type/ovary position: Hypogynous

Flower symmetry: actinomorphic (regular)

Additional distinctive features: Leaves toothed __________________________________________________________________________________

Pale touch-me-not (Impatiens pallida)

Flower #4

Pale touch-me-not plant

Orchid Flower

This flower was found here: Near a vernal pool in a woody park (Glen Echo Park)

It is on page 54 in Newcomb’s Wildflowers.

Common name: Pale touch-me-not‚ Scientific name: Impatiens pallida

Corolla: 5 petals, fused

Calyx: 3 separate sepals

Adroecium: 5 separate stamens

Gynoecium type: Syncarpous, 5 carpels
You can see the ovary split into 5 chambers.

Flower type/ovary position: Hypogynous

Flower symmetry: zygomorphic (irregular)

Additional distinctive features: yellow petals with spots __________________________________________________________________________________

Jerusalem Artichoke (Helianthus tuberosus)

Flower #5

Jerusalem Artichoke

Many small red ants on the stem!

location and habitat: Found up on a hill in Glen Echo Park, several meters from a shallow stream

scientific and common names: Jerusalem Artichoke/Sunroot/Sunchoke (Helianthus tuberosus)

distinctive features: 12 large “petals” which are each their own flower with many tiny yellow flowers within, actinomorphic/regular symmetry

Interesting things: Asteraceae family

Common Chicory (Cichorium intybus)

Flower #6

Chicory has a friend

Stalks

location and habitat: Found in Glen Echo Park, in a woody area several meters from a shallow stream

scientific and common names: Common Chicory (Cichorium intybus)

distinctive features: 11 separate petals, two layers of separate sepals (one with 5 one with 8), actinomorphic/regular symmetry

Interesting things: Close up the stamen look curly at the tip, note the tip of the petals. Surprisingly, this flower is also in the Asteraceae family. This plant has many culinary uses (“Chicory,” 2020)!

Black-Eyed Susan (Rudbeckia hirta)

Flower #7

Black-eyed Susan

Black-eyed Susan

location and habitat: Found in Glen Echo Park, one or two meters from a shallow stream

scientific and common names: Black-Eyed Susan (Rudbeckia hirta)

distinctive features: Composite flower (many flowers in “one”), actinomorphic/regular symmetry, dark-colored center

Interesting things: Asteraceae family, this plant can be weedy/invasive (Plants Profile for Rudbeckia Hirta (Blackeyed Susan), n.d.)

Pink Knotweed (Polygonum pensylvanicum)

Flower #8

Only a few flowers in bloom

location and habitat: Found in Glen Echo Park, in a woody area several meters from a shallow stream

scientific and common names: Pink Knotweed (Polygonum pensylvanicum)

distinctive features: pink, grain-like flowers with 5 petals, alternate leaves (not pictured), actinomorphic/regular symmetry

Interesting things: Polygonaceae family

 

References:

Chicory. (2020). In Wikipedia. https://en.wikipedia.org/w/index.php?title=Chicory&oldid=977584879
Plants Profile for Rudbeckia hirta (blackeyed Susan). (n.d.). Retrieved September 9, 2020, from https://plants.usda.gov/core/profile?symbol=RUHI2