Getting ready to reproduce - a photo on Flickriver

            Whisk fern hybrid (Psilotum x intermedium) sporophyte producing sporangia. These plants don't make pollen or seeds but reproduce entirely through spores. They are actually ferns that have lost some of their fern-like characteristics.

The sporangia are basically the equivalent to gonads in animals except that they produce spores instead of gametes. Inside the sporangia, diploid cells undergo meiosis to form haploid spores. The spores are dispersed and have the ability to grow into multicellular haploid organisms called gametophytes. These microscopic gametophytes in turn are able to produce egg and sperm cells through mitosis. The sperm cells swim towards the egg when water is available and fertilize it which will form a diploid zygote that develops into a sporophyte embryo and eventually grows up into a plant like this.

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Taken in: United States / North Carolina / Boone / Dougherty Heights (show map)

Taken on: November 2, 2009

Tags:

Canon PowerShot SX10 IS

botany

whisk fern

sporangia

Psilotum nudum

Psilotaceae

Pteridophyta

green

fern ally

sporophyte

sporangium

alternation of generations

Psilotum complanatum

Psilotum hybrid

spore plant

hybrid

sporic meiosis

seedless

cc by-nc-sa

taxonomy:binomial=Psilotum intermedium

taxonomy:genus=Psilotum

taxonomy:kingdom=Plantae

taxonomy:phylum=Psilophyta

taxonomy:class=Psilopsida

taxonomy:order=Psilotales

taxonomy:family=Psilotaceae

taxonomy:common=Whisk fern « less

Sets appears in: • Seedless Plants • 3 x 4 Set 1 more » • Psilotaceae « less

Groups appears in: • Botany • UBCBG Botany Photo of the Day more » • Viva Evolution! • Encyclopedia of Life Images • Botanical Morphology and Anatomy • Lycophytes, Psilophytes, Sphenophytes. Fern Allies. • Psilotum • Life Sciences Teaching Resource « less

Camera: Canon PowerShot SX10 IS, f/5.7, 1/20 sec, 100mm, ISO 80 (more info) (hide info)

Camera:	Canon PowerShot SX10 IS
Aperture:	f/5.7
Exposure Time:	0.05 sec (1/20)
Focal Length:	100mm
ISO:	80
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Mode:	Manual
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	Adobe Photoshop 7.0
Show full info

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