LABIATAE. 



[Vol. Ill, 



2. Koellia Virginiana (L.) MacM. 



Virginia Mountain- Mint. (Fig. 3155.) 



Salureja l'iri;i>n'ana L. Sp. PI. 567. 1753- 



P. lanceola/iim I'ursh. Kl. Am. Sept. 409. 1S14. 



Koellia I'irginiana JIacJI. Met. Minn. 452. 1892. 



Stem strict, ratlier stout, glabrous or pubescent, 

 l°^3° high. Leaves lanceolate or linear-lauceo- 

 late, fragrant, very sbort-petioled or sessile, firui, 

 entire, acuminate at the apex, rounded or nar- 

 rowed at the base, glabrous, or somewhat puberu- 

 lent beneath, or the uppermost densely canes- 

 cent, i'-2' long, 2"-5" wide, often with short leafy 

 branches in their axils; glomerules dense, 4"-5" 

 in diameter, terminal, cymose, canescent; bracts 

 appressed, rigid, acute, acuminate or subulate- 

 tipped, not exceeding the clusters; calj'x cylin- 

 draceous, 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. 



In drj- fields and thickets, Quebec and Ontario to 

 Minnesota, south to Georgia. Alabama and Nebraska. 

 Virginia Thyme, Prairie Hyssop. July-Sept. 



3. Koellia pilosa (Nutt.) Britton. Hairy Mountain-Mint. (Fig. 3156.) 



Pycnanthemum pilosiim Nutt. Gen. 2: 33. 1818. 

 Pycnanllumum mt/licum var. pilosiim A. Grav, Syn. 



Fl. 2: Part I, 355. 1878. 

 Koellia pilosa IJritton, jleni. Torr. Club, 5: 279. 1894. 



Pubescent, at least above, i°-2^^° high. Leaves 

 lanceolate, very short-petioled or sessile, entire or 

 very sparingly denticulate, i'-2' long, 3"-6" wide, 

 firm, acuminate at the apex, mostly narrowed at 

 the base, commonly with smaller ones, or short 

 leafy shoots in their axils; glomerules dense, num- 

 erous, terminal, cymose, villous or hirsute-canes- 

 cent, about 4" in diameter; bracts lanceolate, 

 acuminate, equalling or exceeding the clusters; 

 calyx cylindraceous, narrow, canescent, its teeth 

 lanceolate-subulate, equal, about 3 times as long as 

 wide and one-fourth to one-third the length of the 

 tube; corolla pubescent, its tube little longer than 

 the calyx. 



On prairies and in dry woods, Ohio to Georgia, west 

 to Missouri and Arkansas. July-Sept. 



4. Koellia verticillata (Michx.) Kuntze. Torrey's Mountain-Mint. (Fig. 3157.) 



S^f-^ Bracltysiemon X'erticiUatum Jlichx. Fl. Bor. Am. 



2: 6. pi. 31. 1803. 

 P. Torreyi Benth. Lab. Gen. & Sp. 329. 1834. 

 Koellia veflicillata Kuntze, Rev. Gen. PI. 520. 1891. 



Puberulent, glabrate or pubescent; stem slen- 

 der, i°-2_;<° high. Leaves lanceolate, oblong- 

 lanceolate or linear-lanceolate (rarch' ovate-lan- 

 ceolatc\ short-petioled or sessile, serrulate or 

 entire, acute or acuminate at the apex, rounded 

 or narrowed at the base, I'-j' long, 3"-io" wide, 

 the uppermost sometimes canescent; flower-clus- 

 ters dense, canescent, 5"-6" broad, terminal, cy- 

 mose and commonly also in some of the upper 

 axils; bracts appressed, lanceolate, acuminate, 

 equalling or longer than the clusters; calyx ca- 

 nescent, its teeth subulate or lance-subulate, 2-3 

 times as long as wide, one-fourth to one-third as 

 long as the tube; corolla pubescent, its tube 

 rather exceeding the calyx. 



In dry fields and thickets, Rhode Island to Vir- 

 ginia, west to Missouri. July-Sept. 



