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Published In: Methodus Plantas Horti Botanici et Agri Marburgensis, a staminum situ describendi 585–586. 1794. (Methodus) 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 2/26/2022)
Contributor Text: Abdul Ghafoor
Contributor Institution: Centre for Plant Conservation, University of Karachi – PAKISTAN
Synonym Text:

Castalis Cass., Dict. Sci. Nat. ed. 2 (F. Cuvier) 30: 334. 1824; Blaxium Cass., l. c. 332. 1824; Xenismia DC., Prodr. 5: 509. 1836.


 

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Erect or suberect, annual or perennial herbs or shrubs, with glandular and eglandular hairs. Leaves alternate, simple, toothed to pinnatifid, usually scabrous and glandular–hairy. Capitula radiate, terminal, solitary or corymbose, short or long peduncled. Involucre broadly campanulate. Receptacle flat to slightly convex, with or without paleae. Phyllaries uniseriate, linear–lanceolate, subequal. Ray florets uniseriate, female and fertile or sterile, ligules spreading, yellow to orange or white on both sides, or white above and variously coloured underneath. Disc florets bisexual or inner ones functionally male, tubular, 5–lobed or 5–toothed, lobes yellowish adaxially, dark purple abaxially, styles filiform, shortly bifurcated. Cypselas dimorphic, those of ray florets (when formed) smooth, rugose or tuberculate, rarely winged, of disc florets laterally flattened with thickened margins, smooth and winged.

A genus of about 20 species, distributed in south Africa, Zimbabwe, Botswana and Angola. Represented in Pakistan by the following attractive ornamental plant.

 
 
 
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