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Project Name Data (Last Modified On 6/19/2013)
 

Flora Data (Last Modified On 6/19/2013)
Genus Emilia Cass.
PlaceOfPublication Bull. Soc. Philom. 68. 1817.
Note TYPE: E. flammea Cass.
Description Coarse to frail seasonal weedy herbs; taprooted, but with abundant lateral fibrous roots that sometimes overgrow the taproot. Leaves alternate, variously petiolate or sessile to distinctly amplexicaul. Inflorescence a several-headed, loose- corymbose cyme, arising terminally and sometimes several arising laterally in the axils of the upper leaves. Heads discoid, turbinate to weakly campanulate, especially in age; involucral bracts in a single series and equal in length; calyculate bracts absent; receptacle flat or but slightly convex, naked; florets several to numerous, bisexual and fertile, rose to purple or red to orange, occasionally white, the style branches inconspicuously appendaged or surmounted by a short appendage of fused hairs. Achenes columnar-rapiform, terete with 10 ribs; pappus of abundant white capillary bristles about equalling the corolla.
Habit herbs
Distribution An Old World genus of some 24 species, 3 of which are now widely distributed as pan-tropical weeds.
Note The key distinguishes the bulk of specimens of these 3 species that have been seen by me, but the species are imperfectly separated on morphological features and occasional intermediates are to be expected. No specimens referable to Emilia coccinea have been seen by me from the Panamanian flora, however its presence in adjacent regions is undisputed so it may be expected as an occasional weed.
Reference Baldwin, J. T., Jr. 1946. Cytogeography of Emilia Cass. in the Americas. Bull. Torrey Bot. Club 73: 18-23. Nicolson, D. H. 1975. Emilia fosbergii, a new species. Phytologia 32: 33-34.
Key a. Involucre about equalling or only slightly shorter than the florets; heads 7-12 mm long, narrow, 3-4 times longer than wide; involucral bracts ca. 8; middle and lower leaves often conspicuously lyrate-lobed; florets lavender-pink to purple or white, less frequently reddish ...... 3. E. sonchifolia aa. Involucre usually at least 2 mm shorter than the florets; heads relatively broad, 3 or less times longer than wide; involucral bracts 8-13; leaves usually dentate or but weakly lobed; florets variously colored, sometimes bright red or orange. b. Involucral bracts (7-)9-12 mm long, 8-13; heads mostly 2-3 times longer than wide; florets pink to purple or red but not orange ...... 2. E. fosbergii bb. Involucral bracts 6-9 mm long, mostly ca. 13; heads relatively broad, less than 2 times longer than wide; florets often red to orange ...... 1. E. coccinea
 
 
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