Botanical Survey of India | Flora of India

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Herbs, annual or perennial, erect or prostrate. Leaves alternate, sessile, entire, dentate or trilobed. Heads heterogamous, solitary or few in a loose raceme. Involucre campanulate; bracts 2 - 3-seriate, narrow. Ray florets female, many, usually in 2 or more series, with prominent ligules. Disc florets tubular, 5-lobed, bisexual. Anther bases obtuse. Receptacle flat or convex, naked. Achenes ellipsoid or narrowly obovoid, compressed. Pappus thin, setose, scabrous, often double.

Cosmopolitan, especially N. American; ca 200 species, 14 in India.

Literature. BURTT, B.L. (1948). On Erigeron bonariensis L. Kew Bull. 3: 369-372. CRONQUIST, A. (1943). The separation of Erigeron from Conyza. Bull. Torrey Bot. Club 70: 629. 632. HOFFMAN (1890). Engler & Prantl, Pflanzenf. IV. 5: 164. RECHINGER, K.H. (1986). Compositae-Astereae Erigeron. Fl. Iranica 15-33


1a. Herbs, prostrate 5. Erigeron karvinskianus
b. Herbs, erect or semierect 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

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