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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Annual, biennial, perennial herb, generally not scented. Stem: erect or ascending, generally branched. Leaf: basal and cauline, alternate, 1--3-pinnately lobed; segments linear or thread-like; petiole short or 0. Inflorescence: heads radiate, 1 or in cyme-like clusters; phyllaries graduated in 2--5 series, margins scarious; receptacle convex to conic, epaleate. Ray Flower: 10--35; ray white. Disk Flower: 300--500; corolla generally yellow, +- tubular, 5-lobed, each lobe tip with an abaxial resin gland; anthers minute, tips triangular, bases rounded or +- cordate; style short, branches truncate with bushy tips. Fruit: 3-angled, +- compressed front-to-back, 3--5-ribbed, +- roughened between ribs, glabrous, abaxially with generally 2--3 subapical resin glands; pappus 0 or a minute lobed crown.
Species In Genus: 40 species: Europe, Asia, North America, northern Africa. Etymology: (Greek: three ribbed seeds, describing fruit)
eFlora Treatment Author: David J. Keil
Jepson Online Interchange
Previous taxon: Trichoptilium incisum
Next taxon: Tripleurospermum inodorum
Citation for this treatment: David J. Keil 2016. Tripleurospermum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=69387, accessed on April 30, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 30, 2016.