Close-up photo of a group of dried black pepper fruits on a wooden surface. Each fruit has a thin, wrinkled fleshy part, surrounding a large stone (endocarp), which contains a single seed. A few fruits are cut in half to show the white storage tissue of the seed.

Endosperm is triploid (a unique character in Flowering Plants), but in a few lineages, the endosperm’s job is taken over by the perisperm, a diploid maternal tissue surrounding the megaspore. A classic example of perisperm is Piper nigrum. #cotyledon #Piperaceae #Botany 🌾🧪🌱

Photo of an avocado seed on the surface of the soil in a pot. The seed is germinating, and a shoot is emerging from the seed.

Bonus cotyledon post: If you’ve grown an avocado from seed, you’ll recognize the two massive cotyledons & the shoot that arises from between them. The cotyledons at germination are the cryptocotylar, geal, and storage reserve type. 📷: Hornbeam Arts CCBYNC2 #cotyledon #Lauraceae #Botany 🌾🧪🌱

A close-up photo of a walnut with half of the shell removed to reveal the familiar edible nut, which is cotyledon tissue.

Walnuts come close to having labyrinth seeds. The cotyledons (the edible part) are folded distinctively, but not to the degree of labyrinth seeds. 📷: Ritesh Man Tamrakar CCBYSA2 #cotyledon #Juglandaceae #Botany 🌾🧪🌱

Plate from a book. The upper photo shows the parts of the plant, including leaves, fruit, endocarp, and seed. The lower photo shows the seed cut in half to reveal the highly folded and contorted cotyledons.

The only photo I could find was this plate of Mangifera gedebe. In the lower image, that’s all folded cotyledons, not ruminate endosperm! It’s from The Mangoes: Their Botany, Nomenclature, Horticulture and Utilization by A.J.G.H. Kostermans (2012). #seed #cotyledon #Anacardiaceae #Botany
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🧵 Labyrinth seeds have cotyledons in the seed that are highly convoluted & folded & are sometimes mistaken for ruminate endosperm! It’s an uncommon condition—so uncommon, I couldn’t find good photos. #seed #cotyledon #Botany 🌾🧪🌱
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Photo of potted plants on a greenhouse bench. The plants are seedlings, several per pot, that have their cotyledons above ground, but the cotyledons are not expanded and leafy. They are thick and pale. The shoots above the cotyledons have pinnately compound leaves.

Same photo, but with text and arrows showing the cotyledons.

Earlier today, I posted the diagram of cotyledon exposure, position & function. Here’s a real-life example: Seedlings of Intsia palembanica have phanerocotylar, epigeal, storage cotyledons. #seed #cotyledon #Fabaceae #Botany 🌾🧪🌱

🧵 Germination varies according to cotyledon exposure, position & function. Cotyledon exposure refers to whether they are kept hidden within the seed coat (cryptocotylar) or exposed outside the seed (phanerocotylar). #seed #cotyledon #Botany 🌾🧪🌱
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Close-up photo of a cactus seedling. The seedling is fleshy and succulent. The cotyledons are opposite and horn-like. Spines are emerging from the seedling apex.

Even leafless plants have cotyledons (leaves & cotyledons are not homologous). This seedling of a cactus, Homalocephala texensis (📷: Wolfgang Brüsehaber CCBYNCSA2), shows the two, horn-like cotyledons. Spines (modified true leaves) are just starting to emerge. #Cactaceae #cotyledon #Botany 🌾🧪🌱

Photo of a seedling emerging among the leaflitter. The two opposite cotyledons are green, leafy and linear in shape. Two adult leaves (and one just emerging) show that the adult leaf morphology is pinnately compound.

As all gardeners know, cotyledons (the pair of seed "leaves") can look very different from the true, adult leaves of a plant. The cotyledons of this Operculicarya decaryi seedling are simple & linear, but the true leaves are pinnately compound. #seed #cotyledon #Anacardiaceae #Botany 🌾🧪🌱

Photo of a handful of roasted, shelled peanuts in the palm of a hand. Some are split into two halves (the cotyledons).

Not all seeds have endosperm as their storage tissue. Some seeds store the energy needed for germination in the embryo’s cotyledons. You know peanuts: the 2 halves are the 2 cotyledons. The embryonic root & shoot are the little structures at the base. #cotyledon #Fabaceae #Botany 🌾🧪🌱

📷 Cotyledon undulata (corona de plata)

📲 Encuéntrala aquí: www.curiosarium.net/cotyledon-un...

#Cotyledon #Cotyledonundulata #plantassuculentas #suculentascuriosas #plantasdecolección #jardineríaencasa #CuriosidadesNaturales #Curiosarium #Deplantas #tiendaonlinedeplantas #tiendadeplantasonline

Cotyledon papilaris (ゴルビュー) is also flowering

(It’s looks like it’s got mealybugs or something but actually that’s cottony seeds floating in the air that got stuck to the leaves, which are weirdly sticky)

#succulents #多肉植物 #cotyledon #plants #bloomscrolling

Struggling so hard to capture the gorgeous flowers on this Cotyledon orbiculata var. oophylla (福娘)

#succulents #多肉植物 #cotyledon #plants #bloomscrolling

Photo of the cotyledon sunflower seedling.

#PhotoOfTheDay for #RestOfMyLife #day2334 #DailyPhoto #macro #sunflower #seedling #cotyledon #MacroPhotography #BackyardPhotography #Canon #CanonEOSR5markii #ef100mmf28lmacroisusm #CanonPhotography

Three small echeveria hybrids that have slightly pointed broad leaves with dark red edges and a purple grey tinge.

Three small cotyledon hybrids. One has long, parallel edged leaves, one has fat round leaves, and one has thinner round leaves with a slightly wavy edge. Like a lot of cotyledons they all have a thin red edge round each apple green leaf.

They appreciated last night’s rain. Grown from my own seeds. Echeveria and cotyledon hybrids selected by bumblebees 🙂
#🌱 #Succulents #SucculentSunday #echeveria #Cotyledon #PlantMom

Cotyledon tomentosa, commonly called Bear’s Paw (熊童子) 🐻🥰

This guy loses a bunch of leaves every year during the hottest, most humid part of summer. But it’s bounced back very nicely 👍

#succulents #多肉植物 #cotyledon #plants

🌱 The echeveria flowers are delicate, especially the agavoides. Then there’s this cotyledon that’s somewhat bolder 😂
#FlowerFriday #succulents #echeveria #Cotyledon #flowers #garden

Echeveria gibbiflora / 20 seeds (RARE curly echeveria) - UnusualSeeds Echeveria gibbiflora (curly variety) / 20 seeds per pack synonyms: Cotyledon gibbiflora, Cotyledon gibbiflora var. metallica, Echeveria gibbiflora var. metallica, Echeveria grandis Shipping: - All ord...

Love the color and curly texture of this rare Echeveria gibbiflora succulent plant. Will be sowing the seeds this week. #Echeveriagibbiflora #Cotyledongibbiflora #Succulent #plant #Echeveria #Cotyledon #RarePlants #CurlyLeaves
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My succulent already has 25-30 leaves🥰🌱
It's almost 7 months old. I would like to have more flowers, but I'm afraid to kill them due to my lack of experience in caring for them🥀
Her name is Colett though💖
#plant #cotyledon #Succulent