LABIATAE. 279 



18. BLEPHILIA Eaf. 



1. Blephilia ciliata (L.) Raf. M. p. 797. Dry, open places. Summer. 

 Delaware— Upper Darby, Dr. J. W. Eckfeldt (Fu.). C/ies^er— Paoli 

 (Cr.), Westtown (Sts.) (W. Tr.), Thorndale (St.). Northampton — (P.). 

 New Castle — Col. Davis, Brakely, near Centerville, Commons. 



19. HEDEOMA Pars. Mock Pennyroyal. 

 1. Hedeoma pulegioides (L.) Pers. American Pennyroyal. M. p. 797. 

 Dry fields. Summer. 



20. MELISSA L. 

 1. Melissa officinalis L. Bee-halm. M. p. 79S. Waste places, etc.; 

 escaped. Summer. 



21. CLINOPODIUM L. 



Flower-clustexs dense, axillary and terminal, setaceous-bracted. 1. C. vulgare. 

 Flower-clusters loose, axillary, or forming terminal thyrses; bracts small. 



2. C. Nepeta. 



1. Clinopodium vulgare L. Basil. M. p. 799. Borders of thickets and 



fields. Summer and fall. 



2. Clinopodium Nepeta (L.) Kuntze. Field Balm. M. p. 799. Dry, wa.ste 



ground. Summer. 

 Philadelphia — Fairmount Park (Gi.), Germantown (Me.). 

 Gloucester — Swedesboro (He.) (Li.). 



22. HYSSOPUS L. 



1. Hyssopus officinalis L. Hyssop. M. p. 800. Roadsides; escaped. 

 Summer. 



23. ORIGANUM L. 



1. Origanum vulgare L. Wild Marjoram. M. p. 800. Fields and waste 

 places. Summer. 



24. KOELLIA Moench. Mountain-mint. Basil. 



Leaves prevailingly linear, linear-lanceolate or oblong-lanceolate. 



Calyx-teeth ovate-triangular, acute, one-fourth as long as the tube. 



2. K. Virginiana. 

 Calyx-teeth subulate, lance-subulate or bristle-tipped. 

 Leaves linear or narrowly linear-lanceolate, entire. 



1. K. flexuosa. 

 Leaves lanceolate, entire, or usually serrate. 



Bracts appressed, erect; clusters dense. 3. E. verticillata. 

 Bracts spreading; clusters loose. 4. E. clinopodioides. 



Leaves prevailingly ovate, ovate-oblong or ovate-lanceolate. 

 Calyx-teeth bristle-tipped or subulate. 



Bracts appressed; clusters dense; calyx-teeth bristle-pointed. 



5. K. aristata. 

 Bracts spreading; clusters loose; calyx-teeth subulate. 



6. K. incana. 

 Calyx-teeth triangular. 7. E. mutica. 



1. Koellia flexuosa (Walt.) MacM. M. p. 801. Fields and thicket*. 

 '' Summer. 



