diff --git a/rs.rkt b/rs.rkt
index ac2d996..3111a69 100644
--- a/rs.rkt
+++ b/rs.rkt
@@ -7,7 +7,7 @@
    Species (struct-out reaction) Reaction ReactionName ReactionSystem
    make-reaction enabled? list-enabled union-products apply-rs
 
-   str-triple->reaction
+   str-triple->reaction ht-str-triples->rs
    )
 
   (module+ test
@@ -106,6 +106,20 @@
     (test-case "str-triple->reaction"
       (check-equal? (str-triple->reaction '("a b" "c d" "e f"))
                     (reaction (set 'b 'a) (set 'c 'd) (set 'f 'e)))))
+
+  (: ht-str-triples->rs (-> (HashTable ReactionName (List String String String))
+                            ReactionSystem))
+  (define (ht-str-triples->rs ht)
+    (for/hash : (HashTable ReactionName Reaction)
+              ([(a triple) (in-hash ht)])
+      (values a (str-triple->reaction triple))))
+
+  (module+ test
+    (test-case "ht-str-triples->rs"
+      (check-equal? (ht-str-triples->rs (hash 'a (list "x y" "" "k i")
+                                              'b (list "" "x y" "t j")))
+                    (hash 'a (reaction (set 'y 'x) (set) (set 'k 'i))
+                          'b (reaction (set) (set 'y 'x) (set 't 'j))))))
   )
 
 (require graph "utils.rkt" "generic.rkt")
diff --git a/scribblings/rs.scrbl b/scribblings/rs.scrbl
index a5278eb..abd9325 100644
--- a/scribblings/rs.scrbl
+++ b/scribblings/rs.scrbl
@@ -137,6 +137,17 @@ Converts a triple of strings to a reaction.
 (str-triple->reaction '("a b" "c d" "e f"))
 ]}
 
+@defproc[(ht-str-triples->rs [ht (HashTable ReactionName (List String String String))])
+			     ReactionSystem]{
+
+Converts a hash table mapping reaction names to triples of strings to
+a reaction system.
+
+@ex[
+(ht-str-triples->rs (hash 'a (list "x y" "" "k i")
+                          'b (list "" "x y" "t j")))
+]}
+
 
 @section{Dynamics of reaction systems}