| Asterids | |
|---|---|
 | |
| Impatiens capensis (Ericales) | |
 | |
| Oregano from Lamiales | |
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Core eudicots |
| Clade: | Superasterids |
| Clade: | Asterids |
| Clades | |
Asterids are a largeclade (monophyletic group) offlowering plants, composed of 17orders and more than 80,000 species, about a third of the total flowering plant species.[2][3] The asterids are divided into the unranked cladeslamiids (8 orders) andcampanulids (7 orders), and the single ordersCornales andEricales. Well-known asterids includedogwoods andhydrangeas (order Cornales),tea,blueberries,cranberries,kiwifruit,Brazil nuts,argan,sapote, andazaleas (order Ericales),sunflowers,lettuce,common daisy,yacon,carrots,celery,parsley,parsnips,ginseng,ivies,holly,honeysuckle,elder, andvalerian (clade campanulids),borage,forget-me-nots,comfrey,coffee,frangipani,gentian,pong-pong,oleander,periwinkle,basil,mint,rosemary,sage,oregano,thyme,lavender,wild dagga,olives,ash,teak,foxgloves,lilac,jasmine,snapdragons,African violets,butterfly bushes,sesame,psyllium,potatoes,eggplants,tomatoes,chilli peppers,tobacco,petunias,morning glory, andsweet potato (clade lamiids).
Most of the taxa belonging to this clade had been referred to asAsteridae in theCronquist system (1981) and asSympetalae in earlier systems.[citation needed] The name asterids (not necessarily capitalised) resembles the earlierbotanical name but is intended to be the name of a clade rather than a formal ranked name, in the sense of theICBN.
Genetic analysis carried out afterAPG II maintains that the sister to all other asterids are theCornales. A second order that split from the base of the asterids are theEricales. The remaining orders cluster into two clades, the lamiids and the campanulids. The structure of both of these clades has changed inAPG III.[4][5]
In the APG III system, the following clades were renamed:
The phylogenetic tree presented hereinafter has been proposed by the APG IV project.[3]
| Asterids | |
The lamiid subclade consists of about 40,000 species and account for about 15% of angiosperm diversity, characterized in general by superiorovaries andcorollas with any fusion of the petals (sympetaly) occurring late in the process of development. The major part of lamiid diversity occurs in the group of five orders from Boraginales to Solanales, referred to informally as "core lamiids" (sometimes called Laminae), although Vahliales consists of the single small genusVahlia. The remainder of the lamiids are referred to as "basal lamiids", in whichGarryales is thesister group to the core lamiids. It has been suggested that the core lamiids radiated from an ancestral line of tropical trees in which the flowers were inconspicuous and the fruit large,drupaceous and often single-seeded.[6]
Media related toAsterids at Wikimedia Commons
