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Published In: Species Plantarum 2: 863. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 5/8/2022)
Acceptance : Accepted
Project Data     (Last Modified On 2/12/2022)
Contributor Text: Roohi Abid, M. Qaiser & Rubina Abid
Contributor Institution:

Centre for Plant Conservation, University of Karachi – Pakistan


Department of Botany, ‎University of Karachi, Karachi

Synonym Text:

Erigeron linifolius Willd., Sp. Pl. 3 1955. 1803; C. B. Clarke, Comp. Ind. 50. 1876; Hook. f., Fl. Brit. Ind. 3: 254, 1881; Conyza ambigua DC. Prodr. 5: 381. 1836;  Conyza bonariensis (L.) Cronquist in Bull. Torr. Bot. Club. 70(6): 632. 1943; R. R. Stewart, Ann. Cat. Vasc. Pl. W. Pak. & Kashm. 734. 1972; Grierson in P. H. Davis, Fl. Turk. 5: 133. 1975; in Rech. f., Fl. Iran. Comp. Astereae V. 154: 63. 1982; Hajra in Hajra et al., Fl. Ind. 12: 104. 1995; Grierson & Long in Springate, Fl. Bhutan 2 (3): 1545. 2001; Marsea bonariensis (L.) Badilla in Bot. Soc. Venez. Cienc. Nat. 10: 256. 1946;  Erigeron gusalakensis Rech. f. & Edelb. Dan. Biol. Skr. 8, 2: 9. 1955.


Fl. Per.: July–October in higher altitude and almost throughout the year in plains.


Type: Described from S. America Herb. Linn. 994/11 (LINN).


Native of South America, pantropic in distribution, naturalized as a weed throughout tropics and subtropics including Southern Europe, Asia, Tropical and Subtropical Africa and Australia.

Map Location:

A–7 Gilgit Distt.: c. 90 km from Hawalian on way to Gilgit, 8.9.1981, Kamal Akhter Malik & S. Nazimuddin 1875 (KUH);  B–7 Swat Distt.: Swat Valley, 28.7.1938, T. W. Weatherhead 45 (BM); Bahrain, ± 1525 m, A. Rahman 122 (RAW); C–7 Kashmir Distt.: Thanna Maide (Thana Mandi) to Rajori – Kashmir, 4.10.1880, A. P. Young s. n. (BM); C–8 Kashmir: weed in Shalimar Gardens, Srinagar 26.7.1880, A. P. Young s. n. (BM); D–8 Lahore Distt.: 3 miles from Bhai Pheru on way to canal near Baghrania, 20.4.1969, S. I. Ali, S. A. Farooqi & Sultanul Abedin 2213; F–4 Dadu Distt.: Railway Rest House, Dadu, 2.5.76, Nazimuddin, S. Abedin & Qaiser 87 (KUH); G–4 Karachi Distt.: Karachi University Campus, 18.3.1987, Sadaruddin, Zeenat, Bushreen, Moin & Nadeem 53 (KUH); Karachi University Campus, 9.6.1987, Bushreen, Zeenat & Nadeem 46 (KUH); G–5 Hyderabad Distt.: 1 mile away from Jamshoro on way to Hyderabad on Super Highway, 12.4.1970, M. Qaiser, Asad Raza & Abrar Hussain 614 (KUH).


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Annual or biennial herb, 35–150 cm tall. Stem erect, branched, striate, densely pilose or hirsute. Leaves linear or narrowly lanceolate, usually entire or serrate, acute, sessile or basally attenuate or petiolate, 2–10 cm long, 0.2–0.4 cm wide. Capitula numerous in racemes or panicles, 6–15 mm across, peduncle 8–15 mm long. Receptacle epaleate. Involucre urceolate–semihemispheric. Phyllaries 2–seriate, linear–lanceolate, acuminate, dorsally densely hairy, acute, marginaly scarious, ca 4 mm long, ca 0.5 mm wide, inner ones slightly smaller and thinner. Ray florets female, whitish, numerous, 3.5–4 mm long, apically 3–4 denticulate. Disc florets bisexual, yellow, few, tubular, ca 3.5 mm long, without distinct limb, 3–4 denticulate at the apex. Cypselas oblong–oblanceolate, sparsely hairy, ca 1 mm long. Pappus uniseriate, bristles barbellate, brownish–reddish, ca 3 mm long.

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