Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne, Bot. Jahrb. Syst. 1(2): 175 175 1880. (syn. (≡) Ammannia rotundifolia Buch.-Ham. ex Roxb.);
Roundleaf toothcup, Dwarf rotala • Manipuri: ইশিঙ কুংদো Ishing kundo, লৌবুক লৈৰী Loubuk leiri;
Erect herbs, to 15 cm high; stem reddish, 4-angled. Leaves to 8 x 6 mm, oblong-orbicular, sessile, glabrous, 5-nerved. Racemes 1-1.5 cm long, bracteoles 2 mm long, lanceolate; calyx tube 2.5 mm long, lobes triangular, acute; intersepalar appendages absent; petals 1.5 x 1 mm, obovate; filaments attached near the base of calyx tube; ovary 1 x 1 mm, obovoid, truncate, obtuse, 4-angled; style 1 mm long.
Flowering and fruiting: September-March
Along streams and marshy areas in grasslands
South and South East Asia and also in Japan
The emerse form has rounded leaves, the submerse leaves are narrow lanceolate. It is very variable dependent on light and environmental conditions. Under strong light the leaves can become almost wine red. Pale pink flowers.
This plant can be differentiated from the closely related R. indica by the differences in the two species’ inflorescences. R. rotundifolia bears groups of terminal inflorescence while R. indica has solitary flowers on the axis of the leaves.
A common weed in rice paddies and wet places
A common aquarium plant. Undemanding but likes a lot of light to thrive. Can withstand relatively cool temperatures. Losing its lower leaves usually means it is not receiving enough light. Can be grown emerse in shallow water where it will flower. Forms a good clump under reasonable conditions.
Propagated by cuttings which form as side shoots.
(From Wikipedia on 27.11.13)
Unknown herb-3 from Assam-Jan.2014 : 6 posts by 4 authors. Attachments (5).
Attached images are unknown aquatic herb from Assam. Please ID the plant.
Family : ?
Genus & species :??
Habitat: Grows wild on ditches, rice field
Habit :Aquatic herb
I’m guessing R. rotundifolia because of the shape of leaves and flowers in terminal spikes. I don’t know the plant from the field.
The attached figure from Assam is of Rotala rotundifolia (Buch.-Ha.. ex Roxb.) Koehne
It seems like R. rotundifolia or allied taxa. For correct identity complete botanical description is needed.
Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne SN April09 : Attachments (1). 1 post by 1 author.
Flower for id -ID08042014SH2 : 8 posts by 6 authors. Attachments (1).
Flower for Id pl.
May be Polygonum.
Looks like some Bistota sp.
Not Polygonum…..Looks more like a Rotala sp. (Lythraceae). Please check with R. rotundifolia.
Some links for comparison:
yes Rotala rotundifolia
This should be a Rotala sp.
Rotala species in eFloraofindia (with details/ keys from published papers/ regional floras/ FRLHT/ FOI/ Biotik/ efloras/ books etc., where ever available)
Details are not clear, pl. post close ups & bigger pixel size photos to see the details for proper Id.
Please find enclosed herewith the another photographs of this species. Attachments (1)- 1 MB
The specimen likely to be Rotala rotundifolia
It is Rotala rotundifolia
Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne (accepted name) : 2 posts by 2 authors. Attachments (4)
Location: Kakani, Nepal
Altitude: 6000 ft.
Date: 8 April 2014
Nepali name : सिम झार Sim Jhaar
Location: Nagdaha, Kathmandu, Nepal
Altitude : 4500 ft.
Small aquatic plant for ID :: Thane :: ARKDEC16 : 5 posts by 2 authors. Attachments (6)
This aquatic plant was seen in a cultivated garden in Thane in December 2016.
Can this be Rotala rotundifolia? Requested to validate the ID.
Thanks, … Appears close as per images in Unknown herb-3 from Assam-Jan.2014
The photographs are all belongs to the species Rotala rotundifolia (Butch.-Ham. ex Roxb.) Koehne, of the family Lythraceae, a species found allover India.
seems to me a Rotala sp..
Appears closer to images at Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne as per comparative images at Rotala
Rotala rotundifolia :: Dattaji Salvi Udyan :: 01 MAY 18 : 2 posts by 2 authors. 6 images.
Dattaji Salvi Udyan Thane
Date: May 1, 2018 … Altitude: about 11 m (36 feet) asl
Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koeh
Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne : 1 post by 1 author. Attachments (8)- around 700 kb each.
Location: Pame, Pokhara, Kaski Dt.
Id of Flower – ID30072020 SH1 : 4 posts by 3 authors. Attachments (1)- 960 kb.
Flower for id pl.
Location -Kokilabari, Manas (Assam)
Date – March 2014
I think Rotanda rotundifolia. I have one more old image.
I too concur with …
Thanks, … Yes, Rotala rotundifolia as per comparative images at Rotala
Which rotala?: 3 images.
Seen in Pachmarhi
late March 2022
Check with Rotala rotundifolia
Yes, it appears close to images at Rotala rotundifolia (Buch.-Ham. ex Roxb.) Koehne