Desmodium






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There will be a sterile terminal segment on the fruits in Alysicarpus and is lacking in Desmodium. I think this demarcation will make our identification more easier than considering the the floral characters
 
Keys from Flora of Bhutan
1. Petioles broadly (up to 1 cm) winged; leaves all 1-foliate 1. D. triquetrum (syn. of Tadehagi triquetrum)
+ Petioles unwinged; leaves 3-foliate or sometimes 1-foliate .............. .. 2
2. Inflorescence racemiform; flowers concealed by pairs of leafy orbicular persistent bracts .... 2. D. pulchellum (syn. of Phyllodium pulchellum)
+ Inflorescence umbellate, corymbose, racemose or paniculate; bracts conspicuous only in bud, ovate-lanceolate, caducous, not leafy ....... 3                           3. Stems triangular in section; inflorescence of axillary shortly stalked umbels or corymbs ..................... 3. D. triangulare (syn. of Dendrolobium triangulare)
+ Stems terete; inflorescence of racemes or panicles ........................ .. 4 
4. Leaves 1-foliate or, if 3-foliate, lateral leaflets less than half size of terminal leaflet (see also D. styracifolium); keel petals with short lateral appendages; pods dehiscing along lower suture; seeds with a cup-shaped aril ...... Species 4 (D. motorium (Houttuyn) Merrill; D. gyrans (L.f.) DC., including var. roylei (Wight & Arnott) Baker, Codariocalyx motorius (Houttuyn) Ohashi) syn. of Codariocalyx motorius & 5 (D. gyroides (Link) DC.; Codariocalyx gyroides (Link) Hasskarl.) sy. of Codariocalyx gyroides
+ Leaves 1-foliate or 3-foliate but lateral leaflets more than half size of terminal leaflet; keel petals unappendaged; pods breaking up into 1-seeded segments (dehiscing along lower suture only in D. microphyllum); seeds exarillate (or bearing a rim-like aril in D. microphyllum) ...... 5
5. Leaves 1-foliate ........................................................................................................... 6
+ Leaves 3-foliate (sometimes 1-foliate in D. microphyllum and D. sryracifolium) .......... 7
6. Herbs, usually prostrate, or weak shrubs; leaves broader than long .......................... 9. D. reniforme (synonym for Desmodium renifolium (L.)Schindl.)
+ Shrubs; leaves longer than broad .... Species 6 (D. oblongum Bentham.), 7 (D. gangeticum (L.) DC.) & 8 (D. velutinum (Willdenow) DC.; D. lanfoiium DC.)
7. Flowers borne on wood of previous season ............. .. 10. D. oojeinense
+ Flowers borne on growth of current season (inflorescences sometimes on wood of previous season in D. elegans) .................................. .. 8
8. Leaflets 1.5 cm or less, broadly oblong, orbicular or obovate Species 11 (D. microphyllum (Thunberg) DC.; D. parvifolium DC.) & 12 (D. triflorum (L.) DC.)
+ Leaflets more than 2 cm, usually ovate or elliptic (rarely orbicular in D. styracifolium) ..................................................................... .. 9
9. Pods indented along lower suture only .................................... .. 10
+ Pods indented along both sutures ........................................... .. 13                                                                                                                                                10. Indentations between pod segments shallow, less than half width of pod 11
+ indentations between pod segments deep, almost reaching upper suture 12
11. Leaflets acute or acuminate ................Species 13 (D. kulhaitense Prain), 14 (D. khasianum Prain) & 15 (D. elegans DC.; D. tilitfolium (D. Don) Wall., D. oxyphyllum sensu F.B.I. Dz)
+ Leaflets subacute, obtuse or rounded at apex ......... Species 16 (D. heterocarpon (L.) DC.; D. polycarpum (Poiret) DC.) & 17 (D. styracifolium (Osbeck) Merrill; D. retroflexum (L.) DC., D. capitarum (Burman f.) DC.)
12. Leaflets ovate or ovate-elliptic, acuminate or acute ..... .. Species 18 (D. podocarpum DC.; D. oxyphyllum DC. syn. of Hylodesmum podocarpum), 19 (D. laxum DC.; D. podocarpum DC. var. Iaxum (DC.) Baker syn. of Hylodesmum laxum), 20 (D. williamsii Ohashi) & 21 (D. duclouxii Pampanini)
+ Leaflets elliptic or obovate, obtuse or acute ............ 22. D. concinnum                                                                                                                                        13. Segments of pods +/- isodiametric ..... Species 23 (D. multiflorum DC.; D. floribundum (D. Don.) G. Don) & 24 (D. sequax Wall.; D. sinuatum (Miquel) Baker)
+ Segments of pod longer than broad ...... Species 25 (D. confertum DC.), 26 (D. caudatum (Thunberg) DC.; D. laburmfolium (Poiret) DC.) & 27 (D. laxiflorum DC.)

                                                                                                                                                    

 

From Floral Database of Tamilnadu : 

 
Binomial Habit Notes References Distribution
Desmodium alysicarpoides Van Meeuwen Herb Western Ghats & Eastern Ghats, Evergreen Forests, Grasslands Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Namakkal, Nilgiri, Theni 
Desmodium barbatum (L.) Benth. subsp. sauliereri (Schind.) Ohashi Herb Western Ghats, Evergreen Forests, Grasslands Flora of Tamil Nadu, VOL. I, 1983 Dindigul
Desmodium dichotomum (Willd.) DC. Herb Plains to Low Altitude, Dry Localities Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Dharmapuri, Madurai, Nilgiri, Salem,  Tiruchchirappalli, Viluppuram, Tiruvannamalai
Desmodium dolabriforme Benth.  Herb Western Ghats, Moist Deciduous Forests, Endemic Flora of Tamil Nadu, VOL. I, 1983 Kanniyakumari, Tirunelveli
Desmodium ferrugineum Wall ex Thw. subsp. ferrugineum  Shrub Western Ghats & Eastern Ghats, Moist Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Dindigul, Kanniyakumari, Nilgiri, Salem, Theni, Tirunelveli, Virudhunagar
Desmodium ferrugineum Wall ex Thw. subsp. wynaadense (Bedd. ex Gamble) Ohashi Undershrub Western Ghats,  Evergreen Forests Flora of Tamil Nadu, VOL. I, 1983; Gamble, 1957 Coimbatore, Nilgiri
Desmodium gangeticum (L.) DC.  Undershrub Plains to Low Altitude Flora of Tamil Nadu, VOL. I, 1983 All districts
Desmodium heterocarpon (L) DC. var. heterocarpon Shrub Western Ghats & Eastern Ghats, Moist Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983; Matthew, 1983; Gamble, 1957 Dharmapuri, Dindigul, Nilgiri, Salem, Tirunelveli, Tiruvannamalai
Desmodium heterocarpon (L.) DC. var. strigosum Van Meeuwen Herb Western Ghats, Moist Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Nilgiri
Desmodium heterophyllum (Willd.) DC. Undershrub Western Ghats, Evergreen Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Theni, Tirunelveli
Desmodium laxiflorum DC. Undershrub Plains to Low Altitude Flora of Tamil Nadu, VOL. I, 1983; Matthew, 1983 Coimbatore, Dharmapuri, Dindigul, Madurai, Nilgiri, Salem, Tiruchchirappalli
Desmodium laxum DC. (syn. of Hylodesmum laxum (DC.) H.Ohashi & R.R.Mill) Undershrub Western Ghats,  Moist Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Tirunelveli
Desmodium microphyllum (Thunb.) DC. Herb Western Ghats, Moist Deciduous  to Evergreen Forests, Grasslands Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Dindigul, Nilgiri
Desmodium oojeinense (Roxb) Ohashi Medium Sized Tree Western Ghats, Evergreen Forests Flora of Tamil Nadu, VOL. I, 1983 Nilgiri
Desmodium pryonii DC. Herb Western Ghats, Dry Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Dindigul, Nilgiri,  Tirunelveli, Virudhunagar
Desmodium pulchellum (L.) Benth. (syn. of Phyllodium pulchellum (L.) Desv.) Shrub Western Ghats & Eastern Ghats, Moist Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Madurai, Nilgiri, Salem, Tirunelveli, Tiruvannamalai
Desmodium repandum (Vahl) DC. (syn. of Hylodesmum repandum (Vahl) H.Ohashi & R.R.Mill) Herb Western Ghats & Eastern Ghats, Evergreen Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Dindigul, Namakkal, Nilgiri, Salem, Theni, Tirunelveli
Desmodium styracifolium (Osbeck) Merr. Shrub Western Ghats,  Evergreen Forests Flora of Tamil Nadu, VOL. I, 1983; Gamble, 1957 Dindigul
Desmodium tortuosum (Sw.) DC. Herb Plains, Naturalized, Native of Tropical America Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Kancheepuram, Thanjavur, Tirunelveli
Desmodium triangulare (Retz.) Merr. (syn. of Dendrolobium triangulare (Retz.) Schindl.) Shrub Western Ghats, Moist Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Nilgiri,  Theni, Tirunelveli
Desmodium triflorum (L. ) DC.  Undershrub Plains Flora of Tamil Nadu, VOL. I, 1983 All districts
Desmodium triquetrum (L.) DC. (syn. of Tadehagi triquetrum (L.) H.Ohashi) Undershrub Western Ghats, Dry Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983 Coimbatore, Kanniyakumari, Nilgiri, Theni, Tirunelveli
Desmodium velutinum (Willd.) DC. Undershrub Western Ghats & Eastern Ghats, Deciduous Forests Flora of Tamil Nadu, VOL. I, 1983; Matthew, 1983 Coimbatore, Dharmapuri, Dindigul, Kanniyakumari, Theni, Nilgiri, Ramanathapuram, Salem, Viluppuram, Tirunelveli, Tiruvannamalai  

  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
Botanical name Synonyms Family Common name
Desmodium concinnum Desmodium barbigerum, Meibomia concinnaFabaceae Blue Desmodium
Desmodium dichotomum Desmodium diffusum Fabaceae Chikta
Desmodium elegans Fabaceae Elegant Desmodium
Desmodium gangeticum Hedysarum gangeticumFabaceae Sal Leaved Desmodium
Desmodium heterocarpon Hedysarum heterocarponFabaceae Asian Tick Trefoil
Desmodium laxiflorum Fabaceae Loose Flowered Desmodium
Desmodium multiflorum Hedysarum floribundum, Desmodium nepalense, Desmodium floribundumFabaceae Many-Flowered Desmodium
Desmodium oojeinense Dalbergia oojeinensis, Ougeinia oojeinensis, Ougeinia dalbergioidesFabaceae Sandan
Desmodium triflorum Meibomia triflora, Desmodium parvifolium, Hedysarum triflorumFabaceae Creeping Tick Trefoil
Desmodium velutinum Hedysarum velutinum, Meibomia lasiocarpa, Desmodium latifoliumFabaceae Velvet-Leaf Desmodium

 
 

1997 IUCN Red List of Threatened Plants edited by Kerry Scott Walter, Harriet J. Gillett-
Desmodium wightii Wight & Arn. synonym of Desmodium pryonii DC. - Tamilnadu,
Desmodium wynaadense Gamble synonym of Desmodium ferrugineum subsp. wynaadense (Gamble) H.Ohashi- Kerala T Tamilnadu,
Desmodium travancoricum Bourd.- Kerala

An Excursion Flora of Central Tamilnadu, India By K. M. Matthew (1995)- Details with Keys-
Desmodium repandum (Vahl) DC. synonym of Hylodesmum repandum (Vahl) H.Ohashi & R.R.Mill,

Forest Plants of Eastern India By Amal Bhusan Chaudhuri (1993)- Details with Keys-
Desmodium caudatum (Thunb.) DC. synonym of Ohwia caudata (Thunb.) H.Ohashi ,
Desmodium dioicum (D.Don) DC. synonym of Desmodium confertum DC. ,
Desmodium tiliaefolium G.Don synonym of Desmodium elegans DC. ,
Desmodium gyroides (Roxb.) DC. synonym of Codariocalyx gyroides (Link) Hassk.,
Desmodium polycarpum (Poir.) DC. synonym of Desmodium heterocarpon (L.) DC. ,
Desmodium laburnifolium (Poir.) DC. synonym of Ohwia caudata (Thunb.) H.Ohashi,  
Desmodium motorium (Houtt.) Merr. synonym of Codariocalyx motorius (Houtt.) H.Ohashi,
Desmodium floribundum (D.Don) G.Don synonym of Desmodium multiflorum DC.,
Desmodium pseudotriquetrum DC. synonym of Tadehagi pseudotriquetrum (DC.) Y.C.Yang & P.H.Huang, Desmodium pulchellum (L.) Benth. synonym of Phyllodium pulchellum (L.) Desv.,
Desmodium sambuense (D.Don) DC. synonym of Desmodium multiflorum DC.,
Desmodium latifolium (Ker. Gawl.) DC. is a synonym of Desmodium velutinum subsp. velutinum (Willd.) DC.
 
Flora of Davanagere District, Karnataka, India  By B. K. Manjunatha, V. Krishna, T. Pullaiah (2004)- Details with Keys
Desmodium pulchellum (L.) Benth. synonym of Phyllodium pulchellum (L.) Desv.,
Desmodium triquetrum (L.) DC. synonym of Tadehagi triquetrum (L.) H.Ohashi,

Flora of Medak District, Andhra Pradesh, India By T. Pullaiah, Chintala Prabhakar, B. Ravi Prasad Rao (1998)- Details with Keys
Desmodium biarticulatum (L.) F.Muell. synonym of Dicerma biarticulatum (L.) DC.,
Desmodium pulchellum (L.) Benth. synonym of Phyllodium pulchellum (L.) Desv. & 

I have updated eFI (efloraofindia) pages on Desmodium, Codariocalyx, Dendrolobium, Dicerma, Hylodesmum, Phyllodium & Tadehagi

Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.

Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.

Any comments/ corrections are welcome.




Thanks, ... Why question mark? 

I mean names are going to be changed ?
Ok

Desmodium update : 7 posts by 3 authors.
Now there is no Indian Desmodium species.
All the species have been separated into different old and new genera.
For example Desmodium laxiflorum is now Sohmaea laxiflora.

Yes ...! A few more new names I guess! Grona, Huangtcia, Hylodesmum, Leptodesmia, Ototropis,
Phyllodium, Pleurolobus, Polhillides, Tadehagi and Tateishia! And only one left is Desmodium oojeinense
I guess!
Desmodium oojeinense is now Ougeinia oojeinensis 

So the history of Desmodium is erased?😁
By the way CoL and Gbif still showing as the accepted name.
There are still American Desmodiums. Desmodium scorpiurus, for example, is natrualized in India.
At least one.





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