23 



172 Helonias L. 



1 dioica Ph. Blazing Star. Great Barringto.ru 



173 Hemerocallis L. 



§ 1 fulva L. Day Lily. 



174 Hepatica W. 



1 triloba W. Liverleaf, Liverwort. 



175 Heracleum L. 



1 lanatum Mx. Cow Parsnip. 



176 Hieraceum L. 



1 gronovii L. 



2 kalmii. 



3 marianumW. 



4 pauiculatum L. 



5 venosum L. Hawkweed. 



177 Holcus. 



1 alpinus Wahl. White Hills. 



178 Hordeum. 



1 Jubatum Ait. Marshes, Boston. 



179 HottoniaL. 



1 inflata L. Between New Bedford, Mass. and Tiverton, R. 

 Island. Also at Milton and Dorchester. 



180 Houstonia L. 



1 coerulea L. Venus' 1 * Pride. 



181 Rumulus L. 



1 lupulus L. Hop. 



182 Hydrocotyle L. 



1 americana L. 



1 83 Hydropeltis Mx. 



1 purpurea Mx. Water Shield. 



184 Hydrophytlum L. 



1 canadense L. Windsor. Dr. Porter. 



2 virginicum L. Water Leaf. 



185 Hyoscyamus L. 



1 niger L. Henbane. 



186 Hypericum L. 



1 angulosum Mx. 



2 ascyroides W, St. John's Wort, 



