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Cycas revoluta Thunb., Nova Acta Regiae Soc. Sci. Upsal. 4: 40 1783. (syn: Cycas inermis Oudem. [Illegitimate]; Cycas miquelii Warb.; Epicycas miquelii (Warb.) de Laub.);
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Sago Cycad, King Sago Palm, Sago Palm, Japanese sago palm; “Pahadi Supari’ ‘पहाडी सुपारी’ in Marathi;
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Cycas revoluta (king sago, sago cycad, Japanese sago palm), is a species of gymnosperm in the family Cycadaceae, native to southern Japan. It is one of several species used for the production of sago, as well as an ornamental plant. Absolutely one of the most desired plants for tropical and jungle landscapes. Also known as King Sago Palm or Japanese Sago Palm, it actually is not a palm but is a cycad. Slow growing, drought tolerant and easy to care for with little fertilizer requirements. Glossy dark green pinnate fronds taper into a feather shape that are usually 3′ – 5′ in length coming from the top of the trunk to produce a brilliant fountain shape. This very symmetrical plant supports a crown of shiny, dark green leaves on a thick shaggy trunk that is typically about 20 cm (7.9 in) in diameter, sometimes wider. The trunk is very low to subterranean in young plants, but lengthens above ground with age. It can grow into very old specimens with 6–7 m (over 20 feet) of trunk; however, the plant is very slow-growing and requires about 50–100 years to achieve this height. Trunks can branch multiple times, thus producing multiple heads of leaves.
The leaves are a deep semiglossy green and about 50–150 cm (20–59 in) long when the plants are of a reproductive age. They grow out into a feather-like rosette to 1 m (3.3 ft) in diameter. The crowded, stiff, narrow leaflets are 8–18 cm (3.1–7.1 in) long and have strongly recurved or revolute edges. The basal leaflets become more like spines. The petiole or stems of the sago cycad are 6–10 cm (2.4–3.9 in) long and have small protective barbs that must be avoided.
Roots are called coralloid with an Anabaena symbiosis allowing nitrogen fixation.[3] Tannins-rich cells are found on either side of the algal layer to resist the algal invasion.
As with other cycads, it is dioecious, with the males bearing pollen cones (strobilus) and the females bearing groups of megasporophylls. Pollination can be done naturally by insects or artificially.
Propagation of Cycas revoluta is either by seed or by removal of basal offsets. It is one of the most widely cultivated cycads, grown outdoors in warm temperate and subtropical regions, or under glass in colder areas. It grows best in sandy, well-drained soil, preferably with some organic matter. It needs good drainage or it will rot. It is fairly drought-tolerant and grows well in full sun or outdoor shade, but needs bright light when grown indoors. The leaves can bleach somewhat if moved from indoors to full sun outdoors.
Of all the cycads, C. revoluta is the most popular in cultivation.
CYCAS:
Some time in 1982, while at Pachmarhi, I collected few eyes of Cycas from a mature plant at Bhabatit Dhyan Kendra( opposite Bedi Bungloww). 5 of the plants travelled with me to different places. One was given to … I am sure it is still with him. It is a treat to see bud of a Cycas unfolding. I am fortunate to see this phenomenon each year. 2 of the plants have got place in our home. Attaching an image of the bud of this plant. This is sago Palm, some classify it as King sago… in southern california its very popular front yard plant… gives architectural focal points to the tiny water starved landscapes something green year round…
In this photo the central bunch of spikes is a collection of a round/ ring of young leaves… which ultimately unfurl and when mature and die off will add 2 to 3 inches to the height of the plant….
Below it the light brown “leaves ” with an occasional red peaking out is the female ovary and fruits… (red ) ones are fruits/seeds inside…. young children sometimes eat them to their peril… its toxic …
FINAL diagnosis … King Sago Palm, female… Botanical binomial: Cycas revoluta
(( NOT CYCAD as in above messages) … although it belongs to Family: Cycadaceae but Genus is Cycas..
  Cycas revoluta: . lovely shots….
the rightmost part of the first picture.. reminds me of fingers curled up on the guitar strings.. ready to make music…. and the lower unfurled leaflets of fingers on a piano … just about to touch the keys….
I like the way you have utilized the sun light in the back Botanically its good because you can see the revolute margin of the pinnules which gives the name revoluta to the plant.
Cycas revoluta : Female Cone : Nasik : 091012 : AK: yes.
Gymnosperms fortnight :: Cycadaceae » Cycas revoluta in gardens of Mumbai :: DV01 : 4 images. 7 posts by 5 authors.
Cycas revoluta Thunb.
Native of southern Japan; widely cultivated as an ornamental plant; one of several species of Cycas used for the production of sago … Wikipedia
in various gardens of Mumbai between JAN & APR 07 Your presentation is as Ornamental as the plant. Superb beginning, Scored “6” runs on very first ball…. Very true … I never knew This plant could be presented so nicely. Is this Cycas revoluta??
(Family: Cycadaceae) Location: Panvel. Beautiful closeup! Thanks for sharing Fine pics. Thanks for this spectacular show of this ornamental.
Gymnosperms Fortnight: Cycas revoluta from Delhi-GS-15 : Attachments (2). 1 post by 1 author.     Attached images are Cycas pectinata Buch.-Ham – Female Plant from Barapani Meghalaya.
Date :19.10.2012
Location: Barapani, Meghalaya
Family : Cycadaceae
Genus & species : Cycas pectinata Buch.-Ham (Female Plant) To me this looks like Cycas revoluta.. To me also it looks like Cycad revoluta I also think this is Cycas revoluta.
This common ornamental was shot from botanical garden of Punjabi University, Patiala..
wanted to share because bifurcation of stem is not much common..
Cycas revoluta…. Beautiful pictures … very nice-looking branched cycas – had not seen earlier. Very good photographs.
The cycads first came into being around 270 million years ago in the early Permian, the age just before the dinosaurs appeared. But they became most various and abundant in dinosaur times, and were doubtless staple dinosaur fare. About 130 species are left to us. Very good pictures of this rarity of branching in C.revoluta. Thanks … for nice words.. adding more images from my college campus.. despite not having any traces of male plants, see the vigorous growth of megasporophylls which this never forgets to produce.. thanks to vegetative propagation which keeps this spreading..
    GYNMOSPERM FORTNIGHT (1-14 Dec2013): Cycas revoluta from Uttarakhand_DSR_16 : Attachments (4). 4 posts by 3 authors. Cycas revoluta Thunb. popularly known as ‘Japanese Sago Palm’ or ‘Sago palm’ is a popular ornamental gymnosperm with palm like appearance.
It is also a popular gymnosperm material in UG and PG practical classes of Botany in India.
A native of Japan it is not found as wild species in India. Yes Sir, excellent photos.
Thanks, …, for the wonderful picture.
Araceae, Arecaceae and Zingiberaceae Fortnight- Arecaceae-20 : 3 posts by 2 authors. Attachments (3).
15.082014. mailing some shots of Cycas revoluta. Not a palm … It is a Gymnosperm.
Hooghly-skDec08- looks like Cycas revoluta Thunb. : 3 posts by 2 authors. Attachments (7) yes, … a female plant
the red fruits are attractive to kids and they eat and get sick the red pulpy cover is the toxin can be planted to grow new plants but side shoots are preferred.. Thank you Didi, earlier I saw them, but this time with seeds.
In the year 1972 I saw beautiful plant in a house at Cooch Behar, which attracted me for its symmetrical arrangement of leaves. I did not know the name of that plant at that time. In those days people used to have gardens in their houses and there used to be open space in front of each house. Those who knows about Cooch Behar the house I am referring to is on B S Road. It is on the left side of the road as one approaches from Madan Mohan Chopathi to Harish Pal Chowpathi. I left Cooch Behar in 1974 but whenever I used to visit the place on leave I used to see this plant (now I know this to be a CYCAS) still standing there. I came back to this place in 2005 and the plant was still there. Recently I saw some construction activities in that house I knew the days of my old friend are numbered. I spoke to the owner of the house and came to know that the tree was planted in 1964. He told me the it will be sacrificed. I requested him to talk to the park authorities they may like to translocate the tree. I am not hopeful. I took an image of the plant and uploading it.
I have seen some 100 trees vanishing whose images are with me in my Symbiosis series,
It appears like Cycas revoluta Thunb. (Cultivated) as per comparative images at Cycas That’s sad. I see these transplanted in California often.
May be some local nursery guy can bring it to a safe spot in a botanical garden or some such place? A large root ball has to be dug up with the plant after wrapping the leaves up carefullly to protect the workers and the plant itself.
Cycas revoluta Thunb. ??? : 4 posts by 3 authors. Attachments (3)- 1 Mb each.
Location : Shangrila Hotel , Kathmandu
Date : 25 January 2018
Elevation : 4500 ft.
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Yes sir, this looks like Cycas revoluta.
CYCAS REVOLUTA : 2 posts by 2 authors. Attachments (1)
Attaching a collage of a Cycas revoluta which must be more than 70 years old. The plant is having many off-sets.
ID Request – 05JulAR01 – efloraofindia | Google Groups     Cycas revoluta Thunb. : 6 posts by 2 authors. 4 images- 6 to 7 mb each.
Location: Bangkok, Thailand
Date: 07 December 2019
Elevation: MSL
Habitat: Cultivated I agree with … .
Yes, appears close as per images at Wikimedia Commons. .
  Cycas circinalis with male Cone from Delhi-GS15052024-1: 5 high res. images. Clicked this Cycas circinalis with male cone from Dwarka, Delhi on 2-5-2024 Sir, this should be Cycas revoluta instead… Thanks …, I was also in doubt, but leaves seemed flat. . References:
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