Citrus japonica Thunb., Nova Acta Regiae Soc. Sci. Upsal., ser. 2, 3: 208 (1780) (syn: Atalantia hindsii (Champ. ex Benth.) Oliv., Citrus hindsii (Champ. ex Benth.) Govaerts, Citrus inermis Roxb., Citrus japonica subf. crassifolia (Swingle) M.Hiroe, Citrus japonica subf. hindsii (Chapm. ex Benth.) M.Hiroe, Citrus madurensis Lour., Citrus margarita Lour., Citrus × nobilis subf. kinokumi (Tanaka) M.Hiroe, Citrus × nobilis var. microcarpa Hassk., Fortunella bawangica C.C.Huang, Fortunella crassifolia Swingle, Fortunella hindsii (Champ. ex Benth.) Swingle, Fortunella japonica (Thunb.) Swingle, Fortunella margarita (Lour.) Swingle, Fortunella venosa (Champ. ex Benth.) C.C.Huang, Sclerostylis hindsii Champ. ex Benth., Sclerostylis venosa Champ. ex Benth.) as per POWO;
Fortunella japonica (Thunb.) Swingle, J. Washington Acad. Sci. 5:171. 1915 (Syn: (≡) Citrus japonica Thunb. (basionym); (=) Citrus madurensis Lour.) as per GRIN;
Citrus japonica Thunb., Nova Acta Regiae Soc. Sci. Upsal. 3: 208 1780. (Syn: Atalantia hindsii (Champ. ex Benth.) Oliv.; × Citrofortunella madurensis (Lour.) D.Rivera & al.; Citrus × aurantium var. globifera Engl.; Citrus × aurantium var. japonica (Thunb.) Hook.f. ………..; Citrus erythrocarpa Hayata; Citrus hindsii (Chapm. ex Benth.) Govaerts; Citrus inermis Roxb.; Citrus japonica var. madurensis (Lour.) Guillaumin .; Citrus kinokuni Yu.Tanaka; Citrus madurensis Lour.; Citrus margarita Lour.; Citrus × nobilis var. inermis (Roxb.) Sagot; Fortunella bawangica C.C.Huang [Invalid]; Fortunella chintou (Swingle) C.C. Huang; Fortunella crassifolia Swingle; Fortunella hindsii (Chapm. ex Benth.) Swingle .; Fortunella japonica (Thunb.) Swingle; Fortunella margarita (Lour.) Swingle; Fortunella obovata Tanaka; Sclerostylis hindsii Champ. ex Benth.; Sclerostylis venosa Champ. ex Benth.) as per The Plant List;
SE. China to Hainan; Introduced into: Assam, California, Cuba, Dominican Republic, Gambia, Haiti, Japan, Korea, Puerto Rico, Trinidad-Tobago, Vietnam as per POWO;
China (S-Anhui, Fujian, Guangdong, SE-Guangxi, Hainan, Hunan, Jiangxi, Zhejiang), Vietnam, Taiwan (c), Korea (c), Haiti (c), Dominican Republic (c), Cuba (c), Japan (c), Fiji (c), Cook Isl. (c) (Rarotonga (c)), India (c), Vietnam (c), Sri Lanka (c), Palau Isl. (c), Burma (c), Nepal (c), Pakistan (c), USA (c) (California (c)), Mexico (c), Bolivia (c), Trinidad & Tobago (c), Micronesia (c) (Pohnpei) (c)), Honduras (c) as per Catalogue of Life;
Fruits smallest, petiole narrowly winged, leaflet also smallest as per description in Flora of China;


Ornamental Oranges for ID : 180711 : AK-1:
Taken at a private terrace garden in Pune, Maharashtra on 24/12/2005.
Didn’t taste them….but I’m told they are sour.

I had this miniature orange plant bought from a vendor from Darjeeling. The fruit is very sour even when ripe. The young fruits are used to make achar. I am also waiting for ID.

Could be Fortunella japonica (Citrus japonica / Citrus fortunella)

yes, these are commonly called chinese oranges and are very bitter and sour. but they make a wonderful bitter marmalade and pickle. They are also preserved whole in a brandy and sugar syrup to make delicious liqueur.

I got one of these too last year and though mine is a small plant it already has about 5 fruits on it. I have been looking for it’s ID too and I thought it might be the Calamondin orange. Not sure though.


Rutaceae week: UD7 Ornamental Citrus not otherwise classified:
Citrus plants are often used and cared for their Ornamental value…
liked these one summer in a southern California garden….
no labels were present , and the day I photographed them a gardener was not around…
So have labelled them DUBIA…
I am submitting them just for their beauty

I just found some notes… hastily jotted down these fruits were most likely Kumquats…. so not really dubia,

Yes This seems to be the oval kumquat, Fortunella margarita (Lour.) Swingle (syn: Citrus margarita Lour.), Nagami kumquat,
The other type, rounded kumquat is Fortunella japonica, also called marumi kumquat


Kumquat – California – 281113 – RK : Attachments (7). 1 post by 1 author.
Citrus japonica – Rutaceae Los Altos – last of US plant series – May-June 2013 – pic of fruit taken – 08/07/13 – & the rest 18/07/13. Late morning. Had thought i would not be present when flowers had opened satisfactorily – decided to try my luck just 1/2 an hr before departure for airport – was delighted to see quite a load of flowers:) The fruit is just over an inch in diameter & can be eaten whole – rind & all!

Fruits & Vegetables: Citrus var.???_RKC:
Commonly available in the market of S. Korea.

I think Citrus sinensis, the orange

Citrus sinensis we get them here too

I hope it is Citrus japonica, Kumquot, looks similar to C. sinensis but fruit is mostly smaller than 2.5 cm, mostly 3-4 chambered.

Citrus japonica from Delhi, Kumquot : 2 posts by 2 authors. Attachments (2)
This is to add to the images shared earlier by … from China.
Citrus japonica, Kumquot, a small tree or shrub easily differentiated by its small fruits mostly smaller than 2 cm, 3-4 chambered, rarely up to 6-chambered, grown as ornamental. Clicked from Delhi. 

Citrus Fruits for ID : Lalbagh, Bangalore : 180518 : AK-12 : 20 posts by 6 authors. Attachments (6)
All the fruits were small in size, not getting bigger.
Could be Atalantia Species?

Pl. also check Atalantia species in efi site with images.

yes it looks like Atalantia monophylla

Was lucky to see a couple of ripe fruits on the same plant yesterday.
Attachments (3)

Net images showing different fruit images.

could not this  be just the run of the mill nagpur santara. i just bought some and they thay this same fluffy looking wrinkled skin and the knobby distal end

yes I agree with …, not Atalantia or Pamburus

I was also thinking it to be oranges.

Thank you all for the feedback.
The fruits were very tiny, approx half an inch.
The pictures have been taken using a zoom.
The unripe ones posted earlier in the same post were the size of a pea.

Noted. citruses of same sp can be many sizes, unless its commercially grown, where nurseries do most likely mass production in tissue explants etc

Pl. check tiny orange like fruits of ×Citrofortunella microcarpa

Since it is a cultivated plant it may be kumquat fruit; Citrus japonica

Thanks, … What id the difference between Citrus japonica and ×Citrofortunella microcarpa ?

Synonyms according to most databases, though not very clear
Catalogue of life considers Citrus microcarpa Bunge an accepted name with Citrofortunella microcarpa (Bunge) D. O. Wijnands as synonym

At the same time Citrus microcarpa A. Bunge ambiguous synonym of C. japonica Thunb.
World Flora online considers C. x microcarpa Bunge as ambiguous with Citrofortunella microcarpa (Bunge) D. O. Wijnands  as synonym
C. microcarpa Bunge as synonym of C. japonica Thunb
Kew Database considers C. x microcarpa Bunge as unplaced with Citrofortunella microcarpa (Bunge) D. O. Wijnands as synonym, does not list C. japonica


Citrus japonica Thunb. : 5 posts by 1 author. 5 images- 6 to 7 mb each.
Location : Gyaneswor, Kathmandu, Nepal
Elevation : 1300 m.
Date : 22 April 2020
Habitat : Cultivated
Syn : Fortunella japonica (Thunb.) Swingle
Nepali Name : मुन्तला  Muntalaa



Please tell me the name of this Rutaceae (??) : 7 posts by 3 authors. Attachments (3)
Clicked in Delhi last week.

Could be a species of Atalantia. But not sure in the absence of flowers

I think Citrus mitis Blanco (Chinese orange), an ornamental plant….

I express my sincere thanks to you for kindly telling the name.

It is Citrus japonica Thunb. as per images and details herein.


17082011-BS-001 citrus Shrub for Id from arya PG College Panipat Haryana:

pls id this Citrus shurb shot from Arya PG College Campus Panipat Haryana (220 mts) on 25-6-11
it is a garden shrub about 6 feet high
fruit size about .5 to .75 inche only.
Nurserymen says it is Chinese orange

Citrus microcarpa??? may be a bad guess

I think u r right …

Watch for the fruits and then decide.

Possibly Citrus Aurantium.
Kindly go through the link
At first I thought it may be pomelo, but pomelo flowers have only 4 petals (hope petals is the right term).

I agree with whoever said that to wait till the fruits appear… watch’em mature and then open up one, if its your own tree or your study tree.

It is Citrus japonica Thunb. as per images and details herein.

It is Round kumquat tree. The name is changed to Fortunella japonica. Round shaped fruit used in juice and marmalade making.



Citrus sp. from Alipore:

Attaching pictures of Citrus species found in Alipore Agri-Horicultural Society. The butterfly is also new to me.
Species : Citrus sp.
Habit & Habitat : garden shrub, 5 feet, fruits are small (marble sized)
Date : 25-05-12, 1.35 p.m.
Place : Agri-Hort. Soc. of India, Alipore (Calcutta)
Attachment- Talicada nyseus nyseus on Citrus

It is Citrus japonica Thunb. as per images and details herein.


Rutaceae Week : Tree for ID : Delhi : 080512 : AK-3:
A small cultivated tree, hardly 5 feet in height.

Picture taken on the 11th of Feb,12 in Delhi.
Very few flowers seen, more of tiny Orange like fruits.
Kindly id.

x Citrofortunella microcarpa

It is Citrus japonica Thunb. as per images and details herein.

Fortunella japonica….. Round Kumquat.

Citrus For ID : Jim Corbett,Uttarakhand : 230614 : AK-42 : 4 posts by 2 authors. Attachments (4).
Citrus plant seen in the resort where we were staying.
A cultivated plant, around 3 feet in height seen on 21/5/14.
Species id please.

Look like Calamondin [ x Citrofortunella microcarpa (Bunge) Wijnands]- an intergeneric hybrid of  Citrus reticulata and Fortunella japonica, known only in cultivation.

Thanks to you and … for the id. I had posted one from Delhi earlier which was identified as the same.

Could you look into this as well?
Look like Calamondin [ x Citrofortunella microcarpa (Bunge) Wijnands]- an intergeneric hybrid of  Citrus reticulata and Fortunella japonica, known only in cultivation.

Fruit size when mature ?

I found only the flowers and green fruits during our short stay at Corbett. No idea about the size of the ripe ones. It was a small plant, barely 2-3 feet. Not a tree.

It is Citrus japonica Thunb. as per images and details herein.

But there is a difference in both the flowers, these and the ones seen in Delhi.
Both identified as the same Species.


Rutaceae Week : Ornamental for ID : Nasik : 080512 : AK-1:
A small, ornamental potted plant found in a plant nursery at Nasik on the 2nd of April,12.
White flowers, no fruits present when the picture was taken.

no.. Idea… but the flowers and the peculiar leaves just made me think if it was a Rutaceae member.

May be some Citrus species

Citrus mitis….. Calamondin orange or Hazara…..



POWO  Catalogue of Life  GRIN  The Plant List  BSI Flora of India (Citrus x madurensis Lour.)  Flora of China  FoC illustration  Flora of Pakistan (Citrus madurensis Lour.)

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