Загрузка страницы

This is NOT a Dandelion. | Deep Look

Not every yellow bloom ― or fluffy white globe ― taking over your backyard is a dandelion. Some of them are close relatives called catsears. But both of them have a little secret. To tell them apart and discover why they’re so successful you need to peek under their petals.

Take the PBS Digital Studios Survey: http://to.pbs.org/2020survey
SUBSCRIBE to Deep Look! http://goo.gl/8NwXqt

DEEP LOOK is an ultra-HD (4K) short video series created by KQED San Francisco and presented by PBS Digital Studios. See the unseen at the very edge of our visible world. Explore big scientific mysteries by going incredibly small.
---
Gardeners cursing as they yank out yellow blooms from the ground might be misplacing their anger. Not everything that looks like a dandelion is one.

Dandelions have many doppelgangers, among them the most successful plant you’ve never heard of: catsears.

Bees and butterflies love the nectar and pollen provided by dandelions and catsears, and little songbirds like lesser goldfinches feed on their seeds. But it’s hard to convince some gardeners of their virtues.

“Most people who have a nice turf want only grasses,” said Joe DiTomaso, a weed researcher who retired from the University of California, Davis.

Whether you’re a friend or a foe, telling dandelions and catsears apart could be useful ― if only to know thine enemy ― and a fun way to ponder what makes these yellow blooms so successful.

--- How do you tell if it’s a dandelion?

Under a dandelion’s ― and a catsear’s ― petals you’ll see green structures that hold the bloom. They’re called phyllaries. In catsears, they all point up. In dandelions, some phyllaries curl down.

Dandelion and common catsear leaves have a similar shape, with toothed edges that give dandelions their name ― an adaptation from the French dent-de-lion, or lion’s tooth. The leaves of the common catsear are more lobed than pointy and they’re furry, while dandelions’ are smooth. Both leaves are edible, prepared in salads or sautéed.

One other way to tell them apart is that each stem of catsears branches into multiple blooms, while dandelions have only one bloom per stem.

-- What other plants look like dandelions?

A plant by the scientific name of Leontodon resembles dandelions so much that it is known as false dandelion. It is also known as lesser hawkbit, said DiTomaso.

“Where it’s confusing is its leaves look fairly similar and it has one flower per stem like dandelion, so a lot of people think it’s dandelion,” he said.

---+ Read the entire article on KQED Science:

https://www.kqed.org/science/1969214/this-is-not-a-dandelion

---+ More Great Deep Look episodes:

Watch This Bee Build Her Bee-jeweled Nest
https://youtu.be/oPbH1YhsdP8

Why Do Tumbleweeds Tumble?
https://youtu.be/dATZsuPdOnM

---+ Shoutout!

🏆Congratulations🏆 to the following fans on our Deep Look Community Tab for being the first five to correctly explain which flower was a dandelion and which was a catsear!

TorterraGrey8
Original Name
Ary Mailhos

---+ Thank you to our Top Patreon Supporters ($10+ per month)!

Bill Cass
Justin Bull
Burt Humburg
Alex
Shebastian Reyes
Egg-Roll
Josh Kuroda
Daniel Weinstein
Chris B Emrick
Karen Reynolds
Daniel Pang
Tea Torvinen
dane rosseter
David Deshpande
Daisuke Goto
Companion Cube
Nathan Z
Tianxing Wang
luna
Kelly Hong
Kevin Judge
Elizabeth Ann Ditz
Laurel Przybylski
Gerardo Alfaro
Leonhardt Wille
Robert Amling
Mary Truland
Shelley Pearson Cranshaw
Supernovabetty
Laura Sanborn
Sayantan Dasgupta
Cindy McGill
Pamela Parker
Joshua Murallon Robertson
monoirre
Silvan Wendland
Aurora
Dia
Roberta K Wright
Sonia Tanlimco
Levi Cai
Guillaume Morin
Misia Clive
Caitlin McDonough
Rick Wong
Nathan Wright
Titania Juang
Carlos Carrasco
Nicolette Ray
Kristy Freeman
Alexandre Valdetaro
Syniurge
Dogman
Cristen Rasmussen
Geidi Rodriguez
Blanca Vides
Scott Faunce
Noreen Herrington
Kallie Moore
SueEllen McCann
Teresa Lavell
Louis O'Neill
Aurora Mitchell
Sharon Merritt
Pushkar Chitale
KW
Joao Ascensao
TierZoo

---+ Follow KQED Science and Deep Look:
Patreon: https://www.patreon.com/deeplook
Instagram: https://www.instagram.com/kqedscience/
Twitter: https://www.twitter.com/kqedscience
KQED Science on kqed.org: http://www.kqed.org/science

---+ About KQED
KQED, an NPR and PBS affiliate in San Francisco, CA, serves Northern California and beyond with a public-supported alternative to commercial TV, radio and web media.
Funding for Deep Look is provided in part by PBS Digital Studios. Deep Look is a project of KQED Science, the largest science and environment reporting unit in California. KQED Science is supported by The National Science Foundation, the Dirk and Charlene Kabcenell Foundation, the Vadasz Family Foundation, the Gordon and Betty Moore Foundation, Campaign 21 and the members of KQED.

Видео This is NOT a Dandelion. | Deep Look канала Deep Look
Показать
Комментарии отсутствуют
Введите заголовок:

Введите адрес ссылки:

Введите адрес видео с YouTube:

Зарегистрируйтесь или войдите с
Информация о видео
8 сентября 2020 г. 17:58:01
00:04:50
Яндекс.Метрика