Dynamically instantiate a class based on that classes name, in Scala

I have a group of classes, each of which has a member called Description.
I would like the end-user of my library to be able to specify which classes they are interested and be able to read that description. Hence I want to be able to dynamically instantiate each of the specified classes and return the Description.

I'm aware that I need reflection to do this and I've seen a lot of SO questions suggesting Class.forName can help me but I haven't been able to get it working.

Hopefully the following demonstrates what I want to be able to do:

scala> abstract class Feature (start: Short, end: Short){val description: String}
defined class Feature

scala> class Feature1 (start: Short, end: Short) extends Feature(start, end){override val description = "this is feature 3"}
defined class Feature1

scala> class Feature2 (start: Short, end: Short) extends Feature(start, end){override val description = "this is feature 2"}
defined class Feature2

scala> class Feature3 (start: Short, end: Short) extends Feature(start, end){override val description = "this is feature 3"}
defined class Feature3

scala> val classesForWhichIWantToGetTheDescription = Set[String]("Feature1", "Feature2")
classesForWhichIWantToGetTheDescription: scala.collection.immutable.Set[String] = Set(Feature1, Feature2)

scala> val classesWithDescriptions = classesForWhichIWantToGetTheDescription.map(
     |     className => (className, s"I want the class description of ${className} to be displayed here")
     | )
classesWithDescriptions: scala.collection.immutable.Set[(String, String)] = Set((Feature1,I want the class description of Feature1 to be displayed here), (Feature2,I want the class description of Feature2 to be displayed here))

scala> classesWithDescriptions.foreach(
     |     c => println(c)
     | )
(Feature1,I want the class description of Feature1 to be displayed here)
(Feature2,I want the class description of Feature2 to be displayed here)

Can anyone help me achieve this?

thanks in advance