Conyza bonariensis

Conyza bonariensis (L.) Cronquist, Bull. Torrey Club 70 1943. (syn: Aster ambiguus (DC.) E.H.L.Krause; Conyza ambigua DC.; Conyza crispa (Pourret) Rupr.; Erigeron bonariensis L.; Erigeron linifolius Willd. ….);
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fleabane, hairy horseweed, flax-leaf fleabane, wavy leaf fleabane, rough conyza, Argentine fleabane;
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As per efi thread:

Small flowered conyza species: 1. Conyza bonariensis:

Conyza bonariensis (L.) Cronq., Bull. Torrey Bot. Club. 70: 632. 1943 syn: Erigeron bonariensis L; Erigeron linifolius Willd.

It is quite common to find small flowered (rather small headed) species of Conyza throughout India along roadsides and wastelands. They are much more commoner in temperate climates. During my last visit to Kashmir I found that larger headed of the two, more robust, long hairy and low growing Conyza bonariensis (syn: Erigeron linifolius) had come in flowering and more delicate with smaller heads, taller with branching in the upper part Conyza canadensis came up to flowering towards end of June. This year with extended stay in Kashmir i found that by middle of july another very tall often growing to the height of 1-2 m, much more robust plant had come up and started flowering, but by the time C. canadensis had almost started to disappear. Initially I thought this to be late flowering population of Conyza canadensis, but when It came to flowering in August I discovered that it was very distinct from Conyza canadensis in robust habit, broader leaves, larger heads and phyllaries with much shorter hairs. It was finally identified as Conyza albida now correctly known as Conyza sumatrensis, a species often confused with the other two. Here is the key to separate them

1a. Plants usually shorter than 50 cm; lateral branches equalling or overtopping main axis; heads 5-8 mm across; ray corolla shorter than 0.3 mm; fruiting head 8-10 mm across, pappus 3-4 mm long; lower leaves linear-lanceolate, upper linear……..Conyza bonariensis

1b. Plants usually taller than 50 cm; lateral branches shorter than main axis; heads less than 6 mm across; lower leaves lanceolate or oblanceolate, upper linear-lanceolate…….. (2)

2a. Ray corolla shorter than 0.3 mm; heads 4-6 mm across; fruiting head 7-8 mm across, pappus 3-4 mm long; lower leaves oblanceolate, upper linear-lanceolate; plants densely hairy, phyllaries short hairy……….Conyza sumatrensis

2b. Ray corolla 0.3-1 mm long; heads 2-4 mm across; fruiting head 5-6 mm across, pappus 2-3 mm long; leaves lanceolate; plants sparsely hairy; phyllaries with few long hairs…..Conyza Canadensis

efloraindia: 012111 BRS 243: Pl. find the attached file contain photos for id. request.

Yes, This looks like Conyza bonariensis, though a shot of the basal leaves should have been decisive.

identifying plant:  Sir I am sending you some photos of a plant. Please help me to
identify this plant.

Yes as … suggested it is Conyza bonariensis to me also

Looks very close to Conyza bonariensis…..

Yes Conyza bonariensis

Wild Plant for ID : Nasik : 251012 : AK-1: A small wild plant commonly found.

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Asteraceae Fortnight Part 1-Radiate heads: 1. Conyza bonariensis from Kashmir-GS8 : Attachments (5). 3 posts by 3 authors.

Yes …

This very common weed was shot from my village in Kaithal, Haryana… Erigeron bonariensis… hopefully I am right..

A weed seen growing wild inside the garden.

Conyza bonariensis I suppose

Thanks for confirming.

I need id assistance for following plants collected from JNU New Campus Forest, New Delhi. Date: 27.04.2015

Seems like Eclipta prostrata (alba)

This looks to be Conyza bonariensis..

I need id assistance for the following image belonging to Asteraceae member
Date of Collection: 13th April 2015
Locality : JNU New Campus, New Delhi

Not very clear but perhaps Conyza bonariensis

yes of course picture is too dark and somewhat fuzzy

Thank you sir for your correct id assistance although the image was not clear.

Fwd: MS/07/2017/1 : ID of a plant. : 4 posts by 1 author. Attachments (2)

Please identify the plant, a weed /ornamental grown in some body’s house. Sent from one of my friends. The photographs are not clear.

Thanks … For me the ID is correct and take it to label the picture.

A Conyza sp. of Asteraceae?

Kindly check for Gamochaeta sp. of Asteraceae

It looks very close to Conyza canadensis of Asteraceae in my view.

Does not seem to match with any species as per comparative images at Gnaphalieae‎

Wild Plant for ID : Nasik : 21APR21 : AK-11: 4 images.
Wild plant seen in a grassland.

Erigeron bonariensis,

Check with Conyza

I hope conyza bonariensis

Erigeron bonariensis L. looks good …!

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