diff --git a/src/reducers/reducer.latl.js b/src/reducers/reducer.latl.js
index 20117b0..6295001 100644
--- a/src/reducers/reducer.latl.js
+++ b/src/reducers/reducer.latl.js
@@ -110,7 +110,7 @@ const parseReferent = (tree, token, index, tokens) => {
     }
     case 'epoch-name': {
       tree[tree.length - 1] = {...lastNode, name: token.value, type: 'epoch' }
-      return tree;
+      return [...tree, { type: 'main'}];
     }
     case 'epoch': {
       return [...tree, { type: 'rule', value: token.value } ]
@@ -148,6 +148,15 @@ const parseReferent = (tree, token, index, tokens) => {
       tree[tree.length - 1] = lastNode;
       return [...tree]
     }
+    case 'lexicon': {
+      if (!lastNode.epoch) {
+        tree[tree.length - 1].epoch = token.value;
+      }
+      else {
+        tree[tree.length - 1].value.push(token.value)
+      }
+      return tree;
+    }
     default:
       return [...tree, `unexpected referent ${token.value}`]
     }
@@ -160,6 +169,14 @@ const parsePhone = (tree, token, index, tokens) => {
       tree[tree.length - 1] = {...lastNode, value: lastNode.value + token.value }
       return tree;
     }
+    case 'feature--plus':
+      lastNode.positivePhones = [...lastNode.positivePhones, token.value ];
+      tree[tree.length - 1] = lastNode;
+      return tree;
+    case 'feature--minus':
+      lastNode.negativePhones = [...lastNode.negativePhones, token.value ];
+      tree[tree.length - 1] = lastNode;
+      return tree;
     default:
       return [...tree, `unexpected phone ${token.value}`]
   }
@@ -182,6 +199,8 @@ const parseOpenBracket = (tree, token, index, tokens) => {
         return [...tree, {type: 'feature', positivePhones: [], negativePhones: []}];
       case 'feature--minus':
         return [...tree, {type: 'feature', positivePhones: [], negativePhones: []}];
+      case 'main':
+        return [...tree, {type: 'feature', positivePhones: [], negativePhones: []}];
       default:
         return [...tree, 'unexpected open bracket']
     }
@@ -285,17 +304,22 @@ const parseGreaterThan = (tree, token, index, tokens) => {
 
 const parseSlash = (tree, token, index, tokens) => {
   const lastNode = tree[tree.length - 1];
-  switch (lastNode.type) {
-    case 'rule':
-      tree[tree.length - 1] = {...lastNode, value: lastNode.value + token.value}
-      return tree;
-    case 'feature--plus':
-      return tree;
-    case 'feature--minus':
-      return tree;
-    default:
-      return [...tree, 'unexpected slash']
+  if (lastNode) {
+    switch (lastNode.type) {
+      case 'rule':
+        tree[tree.length - 1] = {...lastNode, value: lastNode.value + token.value}
+        return tree;
+      case 'feature--plus':
+        return tree;
+      case 'feature--minus':
+        return tree;
+      case 'lexicon':
+        return [...tree, { }]
+      default:
+        return [...tree, 'unexpected slash']
+    }
   }
+  return [...tree, { type: 'lexicon', value: []}]
 }
     
 const parseHash = (tree, token, index, tokens) => {
@@ -381,6 +405,7 @@ const generateNode = (tree, token, index, tokens) => {
 const addToken = (tree, token, index, tokens) => generateNode(tree, token, index, tokens);
 
 const connectNodes = (tree, node, index, nodes) => {
+  console.log(tree, node)
   switch (node.type) {
     case 'epoch':
       delete node.type;
@@ -408,6 +433,9 @@ const connectNodes = (tree, node, index, nodes) => {
         return tree;
       }
       return {...tree, features: [...tree.features, {...node} ] }
+    case 'lexicon':
+      delete node.type;
+      return {...tree, lexicon: [...tree.lexicon, node]}
     default:
       return tree;
   }
@@ -417,7 +445,7 @@ export const buildTree = tokens => {
   const bareTree = {
     epochs: [],
     features: [],
-    phones: []
+    lexicon: []
   }
   const nodes = tokens.reduce(addToken, []);
   // return nodes
@@ -434,8 +462,8 @@ export const generateAST = latl => {
   // tokenize
   const tokens = tokenize(latl.trim());
   // build tree
-  console.log(tokens)
   const tree = buildTree(tokens);
+  console.log(tree)
   return tree;
 }
 
@@ -444,6 +472,7 @@ export const parseLatl = (state, action) => {
     const latl = state.latl;
     const AST = generateAST(latl);
     const features = AST.features;
+    console.log(AST)
     if (features) {
       if (state.features) {
         state = Object.keys(state.features).reduce((state, feature) => {
@@ -453,12 +482,23 @@ export const parseLatl = (state, action) => {
       state = features.reduce((state, feature) => stateReducer(state, {type:'ADD_FEATURE', value: feature}), state);
     }
     delete AST.features;
+    const lexicon = AST.lexicon;
+    if (lexicon) {
+      if (state.lexicon) {
+        state.lexicon = [];
+      }
+      state = lexicon.reduce((state, epoch) => {
+        return epoch.value.reduce((reducedState, lexeme) => {
+          return stateReducer(reducedState, {type: 'ADD_LEXEME', value: { lexeme, epoch: epoch.epoch }})
+        }, state)
+      }, state)
+    }
+    delete AST.lexicon;
     Object.entries(AST).forEach(([key, value]) => state[key] = value);
     return { ...state, parseResults: 'latl parsed successfully', results:[] }
   }
   catch (e) {
-    console.log(e)
-    return { ...state, parseResults: e}
+    return { ...state, parseResults: 'error parsing', errors: e}
   }
 }
 
diff --git a/src/reducers/reducer.latl.test.js b/src/reducers/reducer.latl.test.js
index 40f1083..9a90514 100644
--- a/src/reducers/reducer.latl.test.js
+++ b/src/reducers/reducer.latl.test.js
@@ -23,18 +23,18 @@ describe('LATL', () => {
     expect(tokens).toStrictEqual(tokenizedFeature);
   });
 
-  // it('returns tokens from well-formed latl lexicon definition', () => {
-  //   const tokens = tokenize(lexiconDefinitionLatl);
-  //   expect(tokens).toStrictEqual(tokenizedLexicon);
-  // });
+  it('returns tokens from well-formed latl lexicon definition', () => {
+    const tokens = tokenize(lexiconDefinitionLatl);
+    expect(tokens).toStrictEqual(tokenizedLexicon);
+  });
   
-  // it('returns tokens from well-formed latl epoch, feature, and lexicon definitions', () => {
-  //   const latl = epochDefinitionLatl + '\n' + featureDefinitionLatl + '\n' + lexiconDefinitionLatl;
-  //   const tokens = tokenize(latl);
-  //   const lineBreaks = [{ type: 'lineBreak', value: '' },{ type: 'lineBreak', value: '' },{ type: 'lineBreak', value: '' }]
-  //   const tokenizedLatl = [...tokenizedEpoch, ...lineBreaks, ...tokenizedFeature, ...lineBreaks, ...tokenizedLexicon];
-  //   expect(tokens).toStrictEqual(tokenizedLatl);
-  // });
+  it('returns tokens from well-formed latl epoch, feature, and lexicon definitions', () => {
+    const latl = epochDefinitionLatl + '\n' + featureDefinitionLatl + '\n' + lexiconDefinitionLatl;
+    const tokens = tokenize(latl);
+    const lineBreaks = [{ type: 'lineBreak', value: '' },{ type: 'lineBreak', value: '' },{ type: 'lineBreak', value: '' }]
+    const tokenizedLatl = [...tokenizedEpoch, ...lineBreaks, ...tokenizedFeature, ...lineBreaks, ...tokenizedLexicon];
+    expect(tokens).toStrictEqual(tokenizedLatl);
+  });
 
   it('returns AST from well-formed epoch tokens', () => {
     const tree = buildTree(tokenizedEpoch);
@@ -46,6 +46,11 @@ describe('LATL', () => {
     expect(tree).toStrictEqual(treeFeature);
   })
 
+  it('returns AST from well-formed lexicon tokens', () => {
+    const tree = buildTree(tokenizedLexicon);
+    expect(tree).toStrictEqual(treeLexicon);
+  })
+
   it('parse returns state from well-formed feature latl', () => {
     const state = initState();
     const setAction = {
@@ -71,6 +76,18 @@ describe('LATL', () => {
     expect(runState).toStrictEqual({...runState, results: runEpochResults})
   })
 
+  it('returns state from well-formed lexicon latl', () => {
+    const state = initState();
+    const setAction = {
+      type: 'SET_LATL',
+      value: lexiconDefinitionLatl
+    }
+    const latlState = stateReducer(state, setAction);
+    const parseState = parseLatl(latlState, {});
+    expect(parseState).toStrictEqual(lexiconState)
+
+  })
+
 })
 const epochDefinitionLatl = `
 ; comment
@@ -462,7 +479,19 @@ const lexiconDefinitionLatl = `
 
 const tokenizedLexicon = [
   { type: "slash", value: "/" }, { type: "referent", value: "PROTO" }, { type: 'lineBreak', value: '' },
-    { type: "referent", value: "kpn" }, { type: 'lineBreak', value: '' },
-    { type: "referent", value: "sm" }, { type: 'lineBreak', value: '' },
+    { type: "whiteSpace", value:"" }, { type: "referent", value: "kpn" }, { type: 'lineBreak', value: '' },
+    { type: "whiteSpace", value:"" }, { type: "referent", value: "sm" }, { type: 'lineBreak', value: '' },
   { type: "slash", value: "/" }
-]
\ No newline at end of file
+]
+
+const treeLexicon = {lexicon: [{epoch: "PROTO", value: ["kpn", "sm"]}]};
+
+const lexiconState = {
+  ...initState(),
+  latl: lexiconDefinitionLatl,
+  lexicon: [
+    { lexeme: 'kpn', epoch: 'PROTO'},
+    { lexeme: 'sm', epoch: 'PROTO'}
+  ],
+  parseResults: 'latl parsed successfully'
+}
\ No newline at end of file
diff --git a/src/reducers/reducer.lexicon.js b/src/reducers/reducer.lexicon.js
index 8fae84d..cb58622 100644
--- a/src/reducers/reducer.lexicon.js
+++ b/src/reducers/reducer.lexicon.js
@@ -20,8 +20,10 @@ const makeLexeme = (lexeme: string, epochName: ?string, state: stateType) => {
   const newLexeme = {lexeme: lexeme, epoch: state.epochs[0]};
   if (epochName) {
     const epochIndex = state.epochs.findIndex(epoch => epoch.name === epochName);
-    if (epochIndex > 0) {
+    if (epochIndex > -1) {
       newLexeme.epoch = state.epochs[epochIndex];
+    } else {
+      newLexeme.epoch = epochName;
     };
   }
   return newLexeme;