This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
[Brachystemon and Pycnanthemum Michx. Fl. Bor. Am. 2: 5, 7. 1803.] Perennial erect, mostly branched, glabrous cinereous canescent or pubescent herbs, with small white or purple-dotted flowers, in terminal or sometimes also axillary capitate glom-erules or cymose clusters. Calyx ovoid, oblong or tubular, 10-13-nerved, equally or more or less unequally 5-toothed, not villous in the throat, the 2 upper teeth sometimes united below. Corolla 2- lipped, the upper lip emarginate or entire, the lower 3-cleft, its lobes obtuse. Stamens 4, didynamous, nearly equal, or the lower pair a little longer; anther-sacs parallel. Ovary deeply 4-parted; style slender. Nutlets smooth, pubescent, or roughened. [Named for J. L. C. Koelle, a German botanist of the eighteenth century.]
About 17 species, natives of North'America. Besides the following, 1 occurs in California and several in the Southern States. Type species: Koellia capitata Moench. Mostly very fragrant. Sometimes called Basil, the proper name of Calamint or Ocymum.
* 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, lance-subulate or bristle-tipped.
Leaves linear or lanceolate; calyx-teeth subulate or lanceolate. Leaves linear or narrowly linear-lanceolate, entire.
2. K. flexuosa.
Leaves lanceolate, entire, or usually serrate. Bracts appressed, erect; clusters dense. Hirsute or pilose: leaves mainly entire.
3. K. pilosa.
Puberulent, short-pubescent, or glabrate; leaves mostly denticulate.
4. K. verticillata.
Bracts spreading; clusters loose.
5. K. clinopodioides.
Leaves oblong to linear-oblong, obtuse or subacute; calyx-teeth awn-like.
6. A. hyssopifoha.
** Leaves prevailingly ovate, ovate-oblong or ovate-lanceolate.
Calyx-teeth bristle-tipped or subulate.
Bracts appressed: clusters dense; calyx-teeth bristle-pointed.
7. K. aristata.
Bracts spreading; clusters loose; calyx-teeth subulate. Calyx-teeth about one-half as long as the tube.
8. K. incana.
Calyx-teeth as long as the tube.
9. K. pyenanthemoides.
Calyx-teeth triangular, triangular-lanceolate or lanceolate. Bracts spreading; clusters loose; calyx-teeth short.
10. K. albescens.
Bracts appressed; clusters dense.
Bracts canescent: leaves firm, acute.
11. K, mutica.
Bracts ciliate or villous; leaves membranous, acuminate.
12. K. montana.
Satureja virginiana L. Sp. Pl. 567. 1753.
P. lanceolatum Pursh, Fl. Am. Sept. 409. 1814.
Koellia virginiana MacM. Met. Minn. 452. 1892.
Stem strict, rather stout, glabrous or pubescent, 1°-3° high. Leaves lanceolate or linear-lanceolate, fragrant, very short-petioled or sessile, firm, entire, acuminate at the apex, glabrous or somewhat puberulent beneath, or the uppermost densely canescent, 1'-2' long, 2"-5" wide, often with short leafy branches in their axils; glomerules dense, 4"-6" in diameter, terminal, corymbed, canescent; bracts appressed, rigid, acute, acuminate or subulate-tipped, not exceeding the clusters; calyx cylindraceous, or expanded above, canescent, its teeth triangular-ovate, equal or nearly so, acute, little longer than wide, about one-fourth as long as the tube; corolla pubescent without, purple-spotted, its tube longer than the calyx.