LAMIACEAE 539 



23. Clinopodium L. 

 1. C. vulgare L. In woods and thickets: N. S. to N. Car., Minn, 

 and Man. Also in Europe and Asia. 



Common as a weed throughout the range, except in the pine- 

 barrens and the coastal plain of L. I. 



C. Acinos (L.) Kuntze, a European weed, has been collected in N. J. I can find 

 no evidence that C. Calamintha (L.) Kuntze is ever "inclined to escape from culti- 

 vation," in our range. C. Nepeta (L.) Kuntze is recorded as a waif from N. J. and Pa. 



24. Hyssopus [Tourn.] L. 



1. H. officinalis L. Along roadsides and in waste places: Ont. to 

 Me. and N. Car. Naturalized from Europe. 

 Rare as an occasional adventive, scarcely persistent. 



25. Origanum [Tourn.] L. 



1. O. vulgare L. In fields and waste places: Ont. to N. J. and 

 Pa. Naturalized from Europe. 

 Locally abundant as a weed. 



26. Thymus [Tourn.] L. 

 1. T. Serpyllum L. In thickets, woods, and along roadsides: 

 N. S. to Mass., N. Y., Pa. and N. Car. Naturalized from 

 Europe. 

 Locally common as a pasture weed, especially northward. 

 T. vulgaris L. has been found as a waif on S. I. 



27. Koellia Moench. 



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

 Calyx-teeth ovate-triangular, acute, one-fourth as long as 



the tube. 1. K. virginiana. 



Calyx-teeth subulate, or bristle-tipped. 



Leaves linear or narrowly linear-lanceolate, entire. 2. K. flexiwsa. 



Leaves lanceolate, usually serrate, sometimes entire. 

 Bracts appressed, erect; clusters dense. 



Hirsute or pilose; leaves mainly entire. 3. K. pilosa. 



Puberulent or glabrate; leaves mostly dentic- 

 ulate. 

 Bracts spreading; clusters loose. 

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

 Calyx-teeth bristle-tipped or subulate. 

 Bracts appressed; clusters dense. 

 Bracts spreading; clusters loose. 

 Calyx-teeth prevailingly triangular. 



