diff --git a/lark/lark.py b/lark/lark.py
index 82cf76a..5c43fa8 100644
--- a/lark/lark.py
+++ b/lark/lark.py
@@ -43,7 +43,7 @@ class LarkOptions(Serialize):
         keep_all_tokens - Don't automagically remove "punctuation" tokens (default: False)
         cache_grammar - Cache the Lark grammar (Default: False)
         postlex - Lexer post-processing (Default: None) Only works with the standard and contextual lexers.
-        start - The start symbol (Default: start)
+        start - The start symbol, either a string, or a list of strings for multiple possible starts (Default: "start")
         profile - Measure run-time usage in Lark. Read results from the profiler proprety (Default: False)
         priority - How priorities should be evaluated - auto, none, normal, invert (Default: auto)
         propagate_positions - Propagates [line, column, end_line, end_column] attributes into all tree branches.
@@ -291,7 +291,12 @@ class Lark(Serialize):
         return stream
 
     def parse(self, text, start=None):
-        "Parse the given text, according to the options provided. Returns a tree, unless specified otherwise."
+        """Parse the given text, according to the options provided.
+
+        The 'start' parameter is required if Lark was given multiple possible start symbols (using the start option).
+
+        Returns a tree, unless specified otherwise.
+        """
         return self.parser.parse(text, start=start)
 
 ###}