Black and white photo. Overhead view of five sepals remaining on a stem after a rose blossom has faded and fallen away. The sepals create a rough star shape. In the center of the star is a circle of fuzz showing where petals, pistils, and stamens were once attached. In the background, out of focus, are many leaves of the rose plant, still attached.
Sepal star. 🌹😉
#flowers #roses #sepals #gardening #black&whitephotography #classicmono
Cell-size patterning occurs as a basipetal wave simultaneously on the adaxial and abaxial sides of the leaf. Cell area heat maps in µm2 of leaf 1 or 2 at different stages of development on the abaxial side (Top Row) and on the adaxial side (Bottom Row) of the same leaf at 5, 6, 7, 8, and 9 dpg (half leaf). Unsegmented regions on adaxial leaves correspond to trichomes, which were not considered in this analysis. Each stage is associated with a distinct heat map color range. Scale bars represent 50 µm at 5 and 6 dpg, and 100 µm at 7, 8, and 9 dpg.
How are #plant #leaf epidermal cells patterned? @roederlab.bsky.social &co show that the pathway controlling #GiantCell formation in #sepals also controls cell size in #Arabidopsis leaves, via cell-autonomous & stochastic specification @plosbiology.org 🧪 plos.io/491F1qQ
Cell-size patterning occurs as a basipetal wave simultaneously on the adaxial and abaxial sides of the leaf. Cell area heat maps in µm2 of leaf 1 or 2 at different stages of development on the abaxial side (Top Row) and on the adaxial side (Bottom Row) of the same leaf at 5, 6, 7, 8, and 9 dpg (half leaf). Unsegmented regions on adaxial leaves correspond to trichomes, which were not considered in this analysis. Each stage is associated with a distinct heat map color range. Scale bars represent 50 µm at 5 and 6 dpg, and 100 µm at 7, 8, and 9 dpg.
How are #plant #leaf epidermal cells patterned? @roederlab.bsky.social &co show that the pathway controlling #GiantCell formation in #sepals also controls cell size in #Arabidopsis leaves, via cell-autonomous & stochastic specification @plosbiology.org 🧪 plos.io/491F1qQ
Cell-size patterning occurs as a basipetal wave simultaneously on the adaxial and abaxial sides of the leaf. Cell area heat maps in µm2 of leaf 1 or 2 at different stages of development on the abaxial side (Top Row) and on the adaxial side (Bottom Row) of the same leaf at 5, 6, 7, 8, and 9 dpg (half leaf). Unsegmented regions on adaxial leaves correspond to trichomes, which were not considered in this analysis. Each stage is associated with a distinct heat map color range. Scale bars represent 50 µm at 5 and 6 dpg, and 100 µm at 7, 8, and 9 dpg.
How are #plant #leaf epidermal cells patterned? @roederlab.bsky.social &co show that the pathway controlling #GiantCell formation in #sepals also controls cell size in #Arabidopsis leaves, via cell-autonomous & stochastic specification @plosbiology.org 🧪 plos.io/491F1qQ
Low growing delicate white star shaped flower. Two open, one in bud
Greater Stitchwort popping up along the grass verges this week. Such a pretty little flower
#wildflowerhour #Yorkshire #sepals @wildflowerhour.bsky.social @bsbibotany.bsky.social
?Dog violet (pointy #sepals) blooming in the gutter of Loring Road, Isleworth - making the most of it before Hounslow revokes its glyphosate ban ? #wildflowerhour
Sorry late again, happy #wildflowerhour some #sepals, many #dandelions and all kinds of lovely going on outside right now. Happy days 😊
#Wildflowerhour montage. Clockwise from top left; Blackthorn, Yellow Archangel, Cherry-plum, Common Dog Violet, Coltsfoot, Wiod Anemone, Gorse, Sweet Violet & American Skunk Cabbage.
A few flowering finds for this week’s #Wildflowerhour including a few where the #sepals are useful identification features. #Moray #Speyside @bsbiscotland.bsky.social @wildflowerhour.bsky.social
Oxlips in no mow area of the garden...important early nectar source...and distinguishable from cowslips partly as they tend to face one way
@wildflowerhour.bsky.social
#ildflowerhour
#Sepals
Nice photo, and apparently the white bits are petaloid #sepals so they qualify for this week's challenge!
A wonderful #WildFlowerHour, nice to see so many #sepals. Huge thanks to all of you who shared pix!
A great way to see lots of wildflowers in your local area is to go out with a local botany group, as @ians4ad.bsky.social did.
Use our interactive map to find your local group:
bsbi.org/local-botany
Sweet violet flower – a deep purple colour – seen from behind showing green sepals
Forget-ne-not
Celandine, yellow flower, green sepals
Sneaking up behind flowers attempting to photograph #Sepals for #WildflowerHour
Sweet Violet, Forget-me-not, Celandine
A white Sweet violet with a violet spur.
Sweet violet var. dumetorum with blunt #Sepals. #WildflowerHour
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@wildflowerhour.bsky.social
#WildflowerHour
#Sepals
Some plants from Cambridge University Botanic Garden
A close up photo of pale yellow primroses with long pale green, hairy sepals at the back of the flowers and hairy stems. The sun was shining.
A patch of delicate pale yellow Common Primrose (Primula vulgaris) revealing the elongated, pale green, hairy #sepals that form the calyx 💛💚 #WildflowerHour
A carpet of Sweet Violets.
A Green Alkanet flower with leaves behind.
A group of Colt’s Foot flowers growing in a grass verge.
The ever growing carpet of Sweet Violets under our boundary hedge for #Sepals with Green Alkanet and Colt’s Foot for #wildflowerhour
A cluster of delicate white Blackthorn flowers, with orange anthers on green stamens and green sepals. The sky is a deep blue.
A close up of a single Blackthorn flower showing the green sepals at its back. The flower has white petals and orange anthers. The sky is a deep blue and there are the dark silhouettes of trees in the distance.
The first of the Blackthorn blossom is starting to explode across the hedgerows in the local woods, offset perfectly by today's glorious blue sky. Lovely green #sepals for #WildflowerHour.
Lots of lovely Violets about in East Dean, West Sussex. I'm putting my head above the parapet and going for Common Dog Violet. #wildflowerhour #Sepals
Purple Sweet violets in grass.
Sweet violets at @theul.bsky.social with blunt #Sepals. #WildflowerHour
A collage of photographs of Ground Ivy, Primrose, Dog’s Mercury, Sweet Violet and what I think is Common Field Speedwell.
For #WildFlowerHour this week a few cemetery finds: Ground Ivy, Primrose, Dog’s Mercury and #Sepals showing on Sweet Violet and what I think is Common Field Speedwell.
The three, green #sepals of lesser celandine (greater celandine has two) in St John Lee #Northumberland this week #wildflowerhour @wildflowerhour.bsky.social @bsbibotany.bsky.social
For #wildflowerhour #Sepals, I found Danish scurvygrass on Beaumaris beach, with four greenish-purple pointed sepals per flower.
Pale lilac colour early dog violet.
Early dog violet with pointy #sepals and long un-notched violet colour spur #WildflowerHour
