diff --git a/flask/blueprints.py b/flask/blueprints.py
index c2158fe3..3673f03b 100644
--- a/flask/blueprints.py
+++ b/flask/blueprints.py
@@ -80,13 +80,51 @@ class BlueprintSetupState(object):
 
 
 class Blueprint(_PackageBoundObject):
-    """Represents a blueprint.  A blueprint is an object that records
-    functions that will be called with the
-    :class:`~flask.blueprints.BlueprintSetupState` later to register functions
-    or other things on the main application.  See :ref:`blueprints` for more
-    information.
+    """Represents a blueprint, a collection of routes and other
+    app-related functions that can be registered on a real application
+    later.
+
+    A blueprint is an object that allows defining application functions
+    without requiring an application object ahead of time. It uses the
+    same decorators as :class:`~flask.Flask`, but defers the need for an
+    application by recording them for later registration.
+
+    Decorating a function with a blueprint creates a deferred function
+    that is called with :class:`~flask.blueprints.BlueprintSetupState`
+    when the blueprint is registered on an application.
+
+    See :ref:`blueprints` for more information.
 
     .. versionadded:: 0.7
+
+    :param name: The name of the blueprint. Will be prepended to each
+        endpoint name.
+    :param import_name: The name of the blueprint package, usually
+        ``__name__``. This helps locate the ``root_path`` for the
+        blueprint.
+    :param static_folder: A folder with static files that should be
+        served by the blueprint's static route. The path is relative to
+        the blueprint's root path. Blueprint static files are disabled
+        by default.
+    :param static_url_path: The url to serve static files from.
+        Defaults to ``static_folder``. If the blueprint does not have
+        a ``url_prefix``, the app's static route will take precedence,
+        and the blueprint's static files won't be accessible.
+    :param template_folder: A folder with templates that should be added
+        to the app's template search path. The path is relative to the
+        blueprint's root path. Blueprint templates are disabled by
+        default. Blueprint templates have a lower precedence than those
+        in the app's templates folder.
+    :param url_prefix: A path to prepend to all of the blueprint's URLs,
+        to make them distinct from the rest of the app's routes.
+    :param subdomain: A subdomain that blueprint routes will match on by
+        default.
+    :param url_defaults: A dict of default values that blueprint routes
+        will receive by default.
+    :param root_path: By default, the blueprint will automatically this
+        based on ``import_name``. In certain situations this automatic
+        detection can fail, so the path can be specified manually
+        instead.
     """
 
     warn_on_modifications = False