Lagerstroemia floribunda Jack, Malayan Misc. 1(5):38. 1820 (Syn: (=) Lagerstroemia turbinata Koehne);
.
peninsular Malaysia (Perlis, Langkawi Isl., Kedah, Penang), Philippines (I), Java (I), Thailand, Vietnam, Myanmar [Burma] (Mandalay, Mon, Taninthayi), Laos, Panama (I), El Salvador (I), Trinidad & Tobago (I), Micronesia (I) (Pohnpei) (I)), Honduras (I) as per Catalogue of life;
.
Lagerstroemia duperreana Pierre ex Gagnep. (syn: Lagerstroemia thorelii Gagnep.)
SPOT-CHARACTERS. — Bark light brown, flaking; leaves, inflorescences, ovaries, capsules all glabrous; pseudopedicel long, 6-12 mm long; calyx lobes conspicuous densely whitish hairy in upper part within.
DISTRIBUTION. — Thailand, Cambodia, Laos, Vietnam.
Lagerstroemia floribunda Jack
SPOT-CHARACTERS. — Bark light brown, flaking; inflorescences short-hairy rust coloured; calyx tube c. 12-ridged; ovary densely hairy; capsules hairy, especially at apex.
DISTRIBUTION. — Myanmar, Thailand, Cambodia, Laos, Vietnam, Peninsular Malaysia.
.
Thai Crape Myrtle;
.

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A tree around 20 ft tall, recorded today. (11.8.15)

  • Leaf : petiole approx. 5 mm; lamina 15 x 8.5 cm; both sides seem to be glabrous; lateral veins 10 pairs
  • Flower : 3 cm across
  • Hypanthium / floral tube : 5 mm approx
  • Calyx : 12 to 14 ribbed
  • Petal :  16 mm in length including claw; number of petals 6, some have 7
Have similarity with L. floribunda Jack. But leaf character differs, not sure of flower colour (ref. following description)
Also differs with description of L. thorelii Gagnep – Biodiversity Library

Pl. also see a very old post 


Thanks …, the link neither provides any information on the species, floribunda, nor provides details on flower morphology.


Further, as per Trees of Delhi (2005), Lagerstroemia thorellii is misaapplied in India for Lagerstroemia speciosa   


Very nice to know … Surprisingly, our scientists still doing research on L. speciosa –

Thank you


This is not L. speciosa (L.) Pers. (L. reginae Roxb.).

This is not L. indica L.
This is not L. duperreana Pierre (if we take account of inflorescence size described in protologue and also if we do not consider it synonymous with L. thorelii Gagnep)
This is not L. thorelii Gagnep (if we take account of leaf character described in the protologue and also if we do not consider it to be synonymous with L. duperreana Pierre). Couldn’t find any info on L. thorelli or L. thorellii in IPNI.
This is not L. floribunda Jack (if we take account of leaf feature described in protologue).

Interestingly Lagerstroemia siamica Gagnep also looks similar!


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Here are my two original unprocessed images showing leaf characters & flowers. Attachments (2)


Thank you … for higher resolution photographs.

My species in this thread looks similar to yours, except 1) the leaves, at least some, in your 1st photograph have acute tip whereas mine have mucronate tips, 2) I have mine stats on calyx, corolla etc what you do not have.
I would very much appreciate if somebody provides me the KEY to differentiate the 2 (or 3) species :- 1) floribunda 2) thorelii and/or duperreana. The matter complicates more if thorelii and duperreana are synonymous.

However, presently ignoring the leaf character I take it similar to your upload, as L. floribunda Jack.


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Fruits of this specimen, we can skip L. thorelli, now choice is between L. floribunda and L. duperreana (host site http://ntbg.org/plants/plant_details.php?plantid=6832).


It should be Lagerstroemia floribunda in view of discussions at Lagerstroemia duperreana Pierre from Bangalore-GS12012020-1 as per differences given below:

Lagerstroemia duperreana Pierre ex Gagnep.

SPOT-CHARACTERS. — Bark light brown, flaking; leaves, inflorescences, ovaries, capsules all glabrous; pseudopedicel long, 6-12 mm long; calyx lobes conspicuous densely whitish hairy in upper part within.
DISTRIBUTION. — Thailand, Cambodia, Laos, Vietnam.
Lagerstroemia floribunda Jack
SPOT-CHARACTERS. — Bark light brown, flaking; inflorescences short-hairy rust coloured; calyx tube c. 12-ridged; ovary densely hairy; capsules hairy, especially at apex.

DISTRIBUTION. — Myanmar, Thailand, Cambodia, Laos, Vietnam, Peninsular Malaysia.


Yes Sir, I agree with your identification.

Thank you very much for the KEY in – efi thread. I am spellbound by your all-out effort to crack it!


Images by J.M.Garg (Inserted by Bhagyashri Ranade)

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this is one of the first thread i had run into when I started to look for crape myrtles in India so many years ago
this is the thread that told me it was a Thai plant
grows on Elgin road near the old crossword bookstore and we all wondered why the flowers were different from the usual Jarul
you showed us why.

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Lagerstoemia ID Bk3 : 4 posts by 4 authors. Attachments (3)

Good to hear from you. It is Lagerstroemia thorelli.


As per Trees of Delhi (2005), Lagerstroemia thorellii is misaapplied in India for Lagerstroemia speciosa   


For me it appears like Lagerstroemia floribunda – Tropical Crape Myrtle


Thank you for sharing.


Taking it as Lagerstroemia duperreana as per discussions at Lagerstroemia duperreana Pierre from Bangalore-GS12012020-1


This may also be Lagerstroemia floribunda in view of discussions at Lagerstroemia duperreana Pierre from Bangalore-GS12012020-1
But close up images are required to see the details.

Seen in Lalbagh on 8/11/14.


Is this Lagerstroemia tomentosa, C. Presl <=> White Crape Myrtle Tree


Not seen this Species before.
So I presumed it was Thorel’s Crape Myrtle, with smaller flowers in white & purple.

This was inside the Sitapur Gate, before the Double Road entry.


Should I take the correct id as Lagerstroemia tomentosa as suggested by …?

Kindly validate.


Not Lagerstroemia tomentosa as per images and details herein.
For correct determination, pl. post the original images.
Adding all three.

Attachments (3) – 2 mb each.


As inflorescence appears to be hairy (from 1st image), I think it should be Lagerstroemia floribunda Jack only.


Yes, it is L. floribunda. The bark is characteristic.
You will find a good description in Trees of Delhi by Pradip Krishen.


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Lagerstroemia Species for ID : Bangalore : 270618 : AK-14 : 9 posts by 5 authors. Attachments (3)
Cultivated Species seen in a park during April.
For Species id please.

Lagerstroemia speciosa


To me it looks different.
Pl. check images at Lagerstroemia floribunda Jack

Thanks … The color of the flowers was different, hence I posted for id.

it is L. flos reginae.

apparently classification keys do not mention color of flowers as a basis for naming a lagerstroemia sp

or flora of china at FOC pdf

May I request you to post the original images for species determination.


Here they are..
Adding one by one.
Attachments (1)- 6 mb.

Second one

Attachments (1)- 6 mb.


Last one

Attachments (1)- 6 mb.


As inflorescence is hairy and bud ridges are clear (not faint), I think it should be Lagerstroemia floribunda Jack only as identified earlier.



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Lagerstroemia duperreana Pierre from Bangalore-GS12012020-1 : 5 posts by 3 authors. Attachments (2)

Lagerstroemia duperreana Pierre
(Syn: Lagerstroemia thorelii Gagnep.)
A species not still represented in our database.
A small tree with oblong-lanceolate leaves, up to 20 cm long, 9 cm broad, glabrous. Flowers in axillary panicles. Calyx tube rounded in bud, minutely appendaged,, not ribbed, stellate-tomentose. Petals ca 12 mm long, orbicular, crisped, lilac or purple, fading to white. Stamens many. Ovary glabrous.

Clicked from Lal Bagh, Bangalore, September 29, 2015


Many species are mentioned in different sources other than the usual ones as below:
Floriculture in India By Gurcharan Singh Randhawa, Amitabha Mukhopadhyay (1986) mentions Lagerstroemia thorellii Gagnep.
NTBG gibes Lagerstroemia duperreana Pierre ex Gagnep.
Flora of Pakistan mentions
Lagerstroemia tomentosa Presl (A native of Burma. Cultivated elsewhere)
Pl. see efi site pages at Lagerstroemia floribunda and Lagerstroemia tomentosa (many posts look similar to your post).
I think we need to find out the correct id along with keys to different posts, including yours.

Thank you Sir. I’ll try to reassess my uploads, if necessary.


Yes, … Pl. go ahead.
I think Lagerstroemia tomentosa Presl is OK. Problem is to find our weather our posts at Lagerstroemia floribunda are of Lagerstroemia floribunda or Lagerstroemia duperreana.

As I could not find any difference or keys on net, we may have to rely on GBIF specimens available at Lagerstroemia floribunda and Lagerstroemia duperreana


After pursuing, GBIF specimens available at Lagerstroemia floribunda and Lagerstroemia duperreana, I feel our posts at Lagerstroemia floribunda may be of Lagerstroemia duperreana.
Pl. see these detailed specimens of Lagerstroemia duperreana as below:
One, two, three and four
compared to that of Lagerstroemia floribunda at link

Before I could finally take decision regarding shifting all other posts at Lagerstroemia floribunda and Lagerstroemia floribunda ? to Lagerstroemia duperreana, I found the keys at Survey of Lagerstroemia L. (Lythraceae) in Indochina (excl. Thailand) with the description of Lagerstroemia densiflora, sp. nov., a new species from Vietnam Willem J. J. O. DE WILDE, Brigitta E. E. DUYFJES Adansonia, sér. 3, 38 (2): 241-255. (2016) as given below:
KEY TO FLOWERING SPECIMENS OF LAGERSTROEMIA L. IN INDOCHINA
(Petals measured in the dry state; the pseudopedicel is the narrowed shorter or longer stipe of the base of the calyx tube)
1. Ovary glabrous …………. 2
— Ovary hairy ……………… 12
2. Flowers small, the bud 1.5-2 mm diam. ……….. 13. L. micrantha Merr.
— Flowers larger, the bud 5 mm diam. or more … 3
3. Flower bud (excluding pseudopedicel) globose ………… 4
— Flower bud obovoid ……………………………………………… 7
4. Flower bud smooth, un-ridged, glabrous, 5-7 mm diam. Petals with claw c. 10 mm long, claw about as long as blade (cultivated) ……… 8. L. indica L.
— Flower bud ridged, short-hairy or glabrous, 5-15 mm diam. Claw of petals much shorter than the blade ………. 5
5. Flower bud c. 5 mm diam., thinly hairy; petals c. 15 mm long …………… 7. L. gagnepainii Furtado & Srisuko
— Flower bud 8-15 mm diam., hairy or glabrous; petals 20 mm long or more …………………………
……………… 6
6. Flower bud glabrous, 12-15 mm diam. ……………………………………………………………. 12. L. macrocarpa Kurz
— Flower bud thinly hairy, 8-11 mm diam. …………………………………………………………… 17. L. speciosa (L.) Pers.
7. Flower bud (calyx tube) not ridged. Infl orescence compact ……. 4. L. densiflora W.J.de Wilde & Duyfj es, sp. nov.
— Flower bud (calyx tube) ridged, sometimes faintly ridged only. Inflorescence compact or lax ………………….. 8
8. Ridges (faint) 12, twice the number of calyx lobes ……………. 5. L. duperreana Pierre ex Gagnep.
— Ridges 5-9, all alternating with as many calyx lobes ………… 9
9. Flowers large, petals 20 mm long or more. Calyx lobes (6-)7-9 ………… 15. L. ovalifolia Teijsm. & Binn.
— Flowers smaller, petals less than 10 mm long. Calyx lobes (5 or) 6 ….. 10
10. Calyx with large ear-like auricles, at anthesis resembling calyx lobes, alternating with the calyx lobes ……………. 20. L. venusta Wall. ex C.B.Clarke
— Calyx without large auricles ……………….. 11
11. Infl orescences compact, short, 3-8 cm long. Leaves beneath with simple hairs all over …………. 21. L. villosa Wall. ex Kurz
— Infl orescences lax, 8-25 cm long. Leaves glabrescent or with minute hairs along the midrib beneath ……………. 3. L. crispa Pierre ex Laness.
12. Calyx lobes glabrous within ………………………. 13
— Calyx lobes (in upper part) hairy within ………… 15
13. Petiole 1-2 cm long. Petals including claw c. 30 mm long ………….. 16. L. petiolaris Pierre ex Laness.
— Petiole less than 1 cm long. Petals including claw less than 30 mm long …….. 14
14. Lower surface of leaves hairy; venation scalariform. Calyx tube with low ridges ……… 19. L. tomensosa C.Presl
— Lower surface of leaves glabrous; venation reticulate. Calyx tube with conspicuous winged ridges …………. 9. L. kratiensis W.J.de Wilde & Duyfj es
15. Calyx tube not or obscurely ridged …………….. 16
— Calyx tube with prominent ridges or wings ……. 19    
16. Infl orescences mostly lateral. Margin of petals fi mbriate. Leaf venation scalariform (introduced) ………….. 11. L. loudonii Teijsm. & Binn.
— Infl orescences terminal. Margin of petals entire or erose. Leaf venation scalariform or reticulate ……………. 17
17. Flower bud obovoid, sessile, i.e. (almost) without pseudopedicel. Leaf venation scalariform ………. 1. L. calyculata Kurz
— Flower bud ± abruptly narrowed into (short) pseudopedicel. Leaf venation reticulate ………………….. 18
18. Petals 15-30 mm long. Longer stamens 6, radially dimorphic …………… 2. L. cochinchinensis Pierre ex Laness.
— Petals 12-15 mm long. Longer stamens 9-11, asymmetrically dimorphic …………. 14. L. noei Craib
19. Calyx tube with 5 or 6 ridges …………… 10. L. lecomtei Gagnep.
— Calyx tube with 12(-14) ridges …………… 20
20. Calyx tube obtusely (broadly) ridged, without or with small auricle (knob-like appendix) at the sinuses between The lobes. Ridges not winged ……….. 6. L. floribunda Jack
— Calyx tube acutely ridged, in bud with small inward-curved auricle at the sinuses. Ridges winged, wings 2-3 mm high ………… 18. L. spireana Gagnep.
Description for both from this document s given below:
Lagerstroemia duperreana Pierre ex Gagnep.
SPOT-CHARACTERS. — Bark light brown, flaking; leaves, inflorescences, ovaries, capsules all glabrous; pseudopedicel long, 6-12 mm long; calyx lobes conspicuous densely whitish hairy in upper part within.
DISTRIBUTION. — Thailand, Cambodia, Laos, Vietnam.
Lagerstroemia floribunda Jack
SPOT-CHARACTERS. — Bark light brown, flaking; inflorescences short-hairy rust coloured; calyx tube c. 12-ridged; ovary densely hairy; capsules hairy, especially at apex.
DISTRIBUTION. — Myanmar, Thailand, Cambodia, Laos, Vietnam, Peninsular Malaysia.
In view, I think we should take all our posts at Lagerstroemia floribunda and Lagerstroemia floribunda ? as Lagerstroemia duperreana

May I request you to pl. post the original images one by one.
I apprehend that it may be Lagerstroemia floribunda only as fruits appear to be hairy as in August2015sk03/03 — Lagerstroemia cultivar2

This should remove any doubt.

Both Kew Database and Catalogue of Life consider it synonym of Lagerstroemia duperreana Pierre ex Gagnep.

Attachments (1)

Here are some original images.
Attachments (2) – 3 mb each.

One more

Attachments (1) – 2 mb.

Images of the fruits are not clear, but I have the feeling that they appear to be hairy.


Where is the original of the first posted image?


Here it is.
Attachments (1) – 2 mb.

Thanks, …  Here also fruits are not clear.


They are glabrous.
Please compare with L. floribunda
Attachments (2)

Thanks, … These images clearly show that fruits are hairy. Pl. compare with … images I have forwarded to you.


Even images displayed at NTBG are of Lagerstroemia floribunda and not of Lagerstroemia duperreana Pierre ex Gagnep. as ridges on buds are prominent and fruits are hairy.


Pl. see this image. Here young fruits (top 2) are clearly hairy.


Pl. see this image. Inflorescence is clearly hairy and not glabrous (glabrous as in Lagerstroemia duperreana).


Also see Trees of Delhi: A Field Guide By Pradip Krishen (2005), which clearly illustrates L.floribunda and matches with our postings.

I think all our plants recorded from Kolkata, Delhi, Bangalore etc. belong to Lagerstroemia floribunda only.


In conclusion what is the final ID


I will go for Lagerstroemia floribunda only

Thanks … I am interested in this plant as Lagersroemias species are common in gardens here.



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L thorelli : 5 posts by 3 authors. Attachments (1)- 4 mb.

Pl. check comparative images at


This may be Lagerstroemia floribunda Jack as per comparative images at Lagerstroemia
Difference between the two close species are as below:
Lagerstroemia duperreana Pierre ex Gagnep. (syn: Lagerstroemia thorelii Gagnep.)
SPOT-CHARACTERS. — Bark light brown, flaking; leaves, inflorescences, ovaries, capsules all glabrous; pseudopedicel long, 6-12 mm long; calyx lobes conspicuous densely whitish hairy in upper part within.
DISTRIBUTION. — Thailand, Cambodia, Laos, Vietnam.
Lagerstroemia floribunda Jack
SPOT-CHARACTERS. — Bark light brown, flaking; inflorescences short-hairy rust coloured; calyx tube c. 12-ridged; ovary densely hairy; capsules hairy, especially at apex.
DISTRIBUTION. — Myanmar, Thailand, Cambodia, Laos, Vietnam, Peninsular Malaysia.
Pl. check yourself as I can not see the desired characters in your image.

This one also, L. floribunda to me



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This is from Jijamata Udyan, Mumbai.
Could you please help me with the correct Species id?

again, this looks like L. floribunda to me. I had seen many of them at Jijimata Udyan. There seems to be a confusion regarding some of these cultivated Lagerstroemia species.
I don’t claim to be an authority on them at all and I might well be wrong! I had looked into this one some time back.

When were these images taken? L. floribunda blooms during and after monsoon in this area.


Thanks a lot. The first image was taken in November, 2011.

The subsequent ones in July and August.


I feel it is L. flos-reginae.


L. flos-reginae is a syn. of Lagerstroemia speciosa, which it is not.

I think id by … is correct.



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Lagerstroemia Species : Bangalore : 03AUG20 : AK-1 : 17 posts by 5 authors. Attachments (3)

Lagerstroemia Tree seen in Bangalore on 1st August, 20.

For Species id please.

Check with L. speciosa Ma’am,


These flowers were smaller in size, and in two colors.
So I thought of L. thorellii.

Can you please check.


Yes, ma’am seems you’re right, let’s wait for experts comments,


Looks like L thorelli

I have it and its in full bloom currently.


This may be Lagerstroemia floribunda Jack as per comparative images at Lagerstroemia
Difference between the two close species are as below:
Lagerstroemia duperreana Pierre ex Gagnep. (syn: Lagerstroemia thorelii Gagnep.)
SPOT-CHARACTERS. — Bark light brown, flaking; leaves, inflorescences, ovaries, capsules all glabrous; pseudopedicel long, 6-12 mm long; calyx lobes conspicuous densely whitish hairy in upper part within.
DISTRIBUTION. — Thailand, Cambodia, Laos, Vietnam.
Lagerstroemia floribunda Jack
SPOT-CHARACTERS. — Bark light brown, flaking; inflorescences short-hairy rust coloured; calyx tube c. 12-ridged; ovary densely hairy; capsules hairy, especially at apex.
DISTRIBUTION. — Myanmar, Thailand, Cambodia, Laos, Vietnam, Peninsular Malaysia.

Pl. check yourself or send high resolution images for verification.


I agree with L. floribunda.


I tried adding high resolution images yesterday but the net was a bit slow and they wouldn’t get attached.
Adding now.
Attachments (1)- 6 mb.

Yes, Lagerstroemia floribunda Jack only.


Thanks a lot … for the Species id.

I need to check a few more of my Lagerstroemia Species.


Can you post comparison images of L floribunda and thorelli? Its learning process for me.

All our observations in efloraofindia turned out to be Lagerstroemia floribunda Jack only.
So does not have images of Lagerstroemia duperreana Pierre ex Gagnep. (syn: Lagerstroemia thorelii Gagnep.)-> in this species leaves, inflorescences, ovaries, capsules are all glabrous, which is not the case in our postings.

I could take more pictures of the bark yesterday.
Hope they help.
Attachments (2)

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