Uncaria scandens

Himalaya to S. China and Indo-China as per WCSP;

Assam; Bangladesh; China South-Central; China Southeast; East Himalaya; Hainan; Laos; Myanmar; Nepal; Thailand; Tibet; Vietnam; West Himalaya as per Catalogue of Life;

Plant more or less pilose throught. Stems brown-tomentose. Hooks tomentose, Stout on older stems. Leaves. Leaves ovate oblong, acuminate, base obtuse to subcordate, sub glabrous to strigillose above, sparsley to denselystrigose beneath, veins raised, primary pairs 8-10, tertiary veins distinct, petioles to 6mm, pubescent. Stipules deeply bifid, lobes ovate triangular. Inflorescences racemose. Flower heads 4-4.5cm diameter, interfloral bracteoles numerous filiform spathulate. Calyx densely pubescent, lobes linear spathulate, 2-3mm. Corolla white, greenish or yellowish pubescent, tube 8-10mm, lobes oblong, 2-3mm. Style excerted 2-6mm; Stigma elongate-clavate, c 3mm. Infructescence 2-2.5cm diameter, pubescent; Fruit subsessile, obovoid, 7-8mm.
Fl. April-July
Lower and middle hill forest.
(Attributions- A.C.J Grierson & D.G Long. Flora of Bhutan. Published by RBGE and RGoB. 1987 from Bhutan Biodiversity Portal)

Request for ID (Sp20) : 7 posts by 3 authors. Attachments (1)
Request ID. Possibly a liana. Leaves opposite; fruits stalked, emerging from axils of leaves, somewhat superficially resembling the fruits of Anthocephalus cadamba. Photograph not so good.
Photographed: in RiBhoi district, Meghalaya
Alt: appx 600m asl
Season: June 2015

There are other similar species like this as below:

I can see big recurved spines in the background. 
It should be an Uncaria sps. Pl check with U. sessilifructus Roxb. (http://plants.jstor.org/fsi/img/size1/alukaplant/bm/phase_01/bm0006/bm000945036.jpg)
Family: Rubiaceae.

This Uncaria scandens [Rubiaceae]

Climber Id from Bangladesh : 6 posts by 3 authors. Attachments (5).
Habit: Climber
Habitat: Climbing  on the plants of scrub jungle of a Hll
Flowering: Monsoon
Location: Sahabazpur, Sylhey, near Assam Hill 
Uncaria, cf. U. macrophylla Wall.
Photo_sourav_Mahmud.JPG2 (4). jpg shows hook.
Attached herewith the key in Bengal Plants
Hope this helps
Thanks ...
I think it is Uncaria sessilifructus Roxburgh (Rubiaceae)
Tree 02 for id from Gori Valley:: NS July 2019-03 : 13 posts by 3 authors. Attachments (7)
This is again from Gori valley area... the stipules are very peculiar..
I know that pics are even poorer than the first one, still any clues to id will be helpful....!!!

Uncaria sessilifructus, Rubiaceae,

Thanks ... for this useful, almost conclusive lead, I never had this in mind.. 

Seeing the fruits I am more inclined towards Uncaria scandens (Fruiting head 20-25 mm in diam. Fruit sessile, obovoid to oblanceoloid, 6-9 mm, hirtellous) than Uncaria sessilifructus Roxburgh (Fruiting head 25-35 mm in diam. Fruit sessile, fusiform, 10-14 mm, sericeous)
Simple key, 
Stipules ovate...............U. scandens
Stipules lanceolate.......U. sessilifructus,

Thanks, ... From where these are taken? 

Flora of China …
Thanks, ..., How about fruits ?:
Uncaria scandens (Fruiting head 20-25 mm in diam. Fruit sessile, obovoid to oblanceoloid, 6-9 mm, hirtellous) than Uncaria sessilifructus Roxburgh (Fruiting head 25-35 mm in diam. Fruit sessile, fusiform, 10-14 mm, sericeous)

Uncaria scandens (Fruiting head 20-25 mm in diam. Fruit sessile, obovoid to oblanceoloid, 6-9 mm, hirtellous- stipules deciduous, ovate, 6-10 mm, deeply 2-lobed, strigillose, puberulent, or glabrescent,  lobes lanceolate, ovate, or narrowly triangular, acute) than Uncaria sessilifructus Roxburgh (Fruiting head 25-35 mm in diam. Fruit sessile, fusiform, 10-14 mm, sericeous- stipules deciduous, ligulate to lanceolate, 7-10 mm, 2-lobed for 2/3 or more, glabrous to densely puberulent, lobes narrowly triangular, acute).
From the above, I have the feeling that there is not much difference in the stipule lobes. Pl. check and let us know.
..., how can we measure to the fruits and shape too, there is not clearly a single fruit, there is only clumped fruits with inflorescence, that's why only I took which character(stipules) differentiate with photos. 

…, please check with which provide information … if you have material, then finalize species,
Pl. see the shape of the fruit in Uncaria sessilifructus at
It looks quite different compared to those posted by ...


MS Dec,2019/05 Uncaria sp. ? for ID : 2 posts by 2 authors. Attachments (3)
Location : Marpara, Mizoram
Altitude : ca 70 m.
Date : 20-12-2019
Habit : Large climbing shrub
Habitat : Wild

To me appears close to Uncaria scandens (Sm.) Hutch. as per comparative images at Uncaria
Are there any other species (other than the two available in efi site) found in your area ?