Keys in Flora of Bhutan:
1. Stems prostrate or ascending; basal leaves 3(-5)-lobed; ligules white or sometimes pink. 5mm .  . .. 1. E. karvinskianus
+ Stems +/- erect; basal leaves unlobed or ligules purplish or blue: ligules 2—4 or 8— 15mm . . . . . . .. 2
2. Eligulate female flowers present between ray and disc flowers . .. .. 3
+ Eligulate female flowers absent . . . . . . . .. 4
3. Leaves entire. glabrous or sparsely pubescent . .. 2. E. acer (? E. acris)
+ Leaves coarsely toothed. white pubescent . . . . … 3. E. sublyratus
4. Stems 15—45cm; involucres 1.5—2.5cm across; rays numerous. 120—200; ligules 8-15mm .  . .. 4. E. multiradiatus
+ Stems 10-15cm; involucres 1-1.5cm across; rays fewer. 50-100. ligules c 10mm . .. 5. E. bellidioides (syn. of Erigeron emodi I. M. Turner)

Keys as per BSI Flora of India:

1a. Herbs, prostrate 5. Erigeron karvinskianus
b. Herbs, erect or semi erect 2
2a. Heads trimorphic 3
b. Heads dimorphic 7
3a. Heads 2-2.5 cm in diam 4
b. Heads 0.5-1.8 cm in diam 6
4a. Cauline leaves obovate to spathulate 12. Erigeron sublyratus
b. Cauline leaves lanceolate to ovate-oblong 5
5a. Inflorescence racemose; ligule white 10. Erigeron roylei
b. Inflorescence corymbose or panicle; ligule usually purplish 1. Erigeron acer
6a. Ligules 4-5 mm long 11. Erigeron semibarbatus
b. Ligules 6-9 mm long 6. Erigeron kumaonensis
7a. Heads usually solitary 8
b. Heads usually more than one 12
8a. Heads 1.5-2 cm in diam. 9
b. Heads more than 2 cm in diam. 10
9a. Leaves entire 7. Erigeron monticolus
b. Leaves subentire 2. Erigeron angustissimum
10a. Herbs, more or less glabrous, up to 30 cm high 4. Erigeron bellidioides
b. Herbs, hirsute or pubescent, up to 60 cm high 11
11a. Heads up to 2.5 cm in diam. 13. Erigeron uniflorus
b. Heads up to 5 cm in diam. 8. Erigeron multiradiatus
12a. Herbs, greyish; heads 5-7.5 cm across 14. Erigeron wightii
b. Herbs, not greyish; heads usually up to ca 4.5 cm across 13
13a. Inflorescence corymbiform panicle 3. Erigeron annuus
b. Inflorescence solitary or few, usually in axillary panicles or on slender scape like stem 14
14a. Flowers white 9. Erigeron pusillum
b. Flowers usually purplish 15
15a. Herbs, usually up to 16 cm high, glabrous or sparsely hairy 7. Erigeron monticolus
b. Herbs, 16-60 cm high, hirsute or pubescent 8. Erigeron multiradiatus


(Images by Nidhan Singh (Id by Krishan Lal) (Inserted by J.M.Garg) (For more photos & complete details, click on the links)) 


Erigeron annuus (L.) Pers. (heads solitary or few on long stalks in E.emodi compared to many in corymbose panicles in E.annuus)



Erigeron emodi I. M. Turner (Stem erect) (heads solitary or few on long stalks in E.emodi compared to many in corymbose panicles in E.annuus)
(Jammu & Kashmir (Kashmir), India (E- & NE-India, Himalayas, Himachal Pradesh, Uttar Pradesh, Sikkim, Meghalaya), Bhutan, Nepal, Pakistan (Swat, Hazara, Murree) as per Catalogue of life)



Erigeron karvinskianus DC. (Stems prostrate or ascending as per Flora of Bhutan)
Mexico to Venezuela; Native to: Colombia, Costa Rica, El Salvador, Guatemala, Honduras, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Panamá, Venezuela; Introduced into: Algeria, Assam, Austria, Azores, Baleares, California, Canary Is., Chatham Is., China Southeast, Corse, Dominican Republic, East Himalaya, Ecuador, Fiji, France, Germany, Great Britain, Haiti, Hawaii, India, Ireland, Italy, Jamaica, Jawa, Leeward Is., Madeira, Mauritius, Morocco, Myanmar, Nepal, Netherlands, New Caledonia, New South Wales, Norfolk Is., Northern Provinces, Peru, Portugal, Réunion, Sicilia, South Australia, Spain, Sri Lanka, Swaziland, Sweden, Switzerland, Tasmania, Victoria, Western Australia, Windward Is., Zimbabwe as per POWO)


Erigeron multiradiatus (Lindl. ex DC.) Benth. ex C.B.Clarke (Images by J.M.Garg (Id by Gurcharan Singh & Tanay Bose), Satish Phadke (Id Gurcharan Singh), Prashant Awale (Validated by Dinesh Valke), Debashis Chaudhary (Validated by Balkar Singh), Balkar Singh, Nidhan Singh & Gurcharan Singh (Id by Krishan Lal) (Inserted by J.M.Garg) (For more images & complete details, click on the links))


Erigeron poncinsii (Franch.) Botsch. (Images by Satish Phadke (Id by Gurcharan Singh) & Tabish (Id by Amit Chauhan & Gurcharan Singh) (Inserted by J.M.Garg) (For more images & complete details, click on the links))


Erigeron sublyratus Roxb. ex DC. (Images by Surajit Koley (Id by D S Rawat) & D S Rawat (Inserted by J.M.Garg) (For more images & complete details, click on the links))



Pl. go through Erigeron page (Asteraceae (Compositae)) with images of species in efloraofindia (done by me).

If you find any mis-identification, pl. let us know.

If anybody can send images of other species of this genera (for incorporation in the website), it will be really nice. Also, if anybody is interested to take up the activity of inserting images on efloraofindia pages from efloraofindia posts, pl. let us know.