LABI AT AE. 799 



* Flower-clusters dense, axillary and terminal, setaceous-bracted. 



i. C. vulgar e. 

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

 Plants pubescent; introduced species. 



Clusters peduncled; calyx not gibbous; upper leaves very small; perennials. 

 Leaves 0.6-2.5 cm/long; corolla somewhat exceeding the calyx. 



2. C. Nepeta. 

 Leaves 2-5 cm. long; corolla at least twice as long as the calyx. 



3. C. Calamintha. 

 Clusters sessile; calyx very gibbous; plant leafy; annual. 4. C. Acinos. 



Plants glabrous: native species. 



Leaves linear or the lower spatulate, entire; corolla 8 mm. long. 5. C. glabrum. 

 Leaves oblong or oblong-lanceolate, serrate; corolla 12-14 mm - l° n g« 



6. C. glabellum. 



1. Clinopodium vulgare L. Field or Wild Basil. Basil-weed. (I. F. f. 

 3146.) Perennial by short stolons, hirsute; stem 3-6 dm. high. Leaves ovate or 

 ovate-lanceolate, petioled, entire, undulate or crenate-dentate, thin, 2-6 cm. long; 

 flowers in capitate clusters 2-3 cm. in diameter; bracts hirsute-ciliate, usually as 

 long as the calyx-tube; calyx pubescent, the setaceous teeth of its lower lip rather 

 longer than the broader ones of the upper; corolla purple, pink, or white, little 

 exceeding the calyx. In woods and thickets, N. S. to N. Car., Minn, and Mani- 

 toba, south in the Rocky Mts. to Colo. Also in Europe and Asia. June-Oct. 



2. Clinopodium Nepeta (L.) Kuntze. Field Balm. Lesser Calamint. 

 (I. F. f. 3147.) Villous or pubescent. Leaves broadly ovate, petioled, crenulate 

 with few low teeth, the lower 1-2.5 cm - loi^g ; flowers few in the numerous loose 

 cymes, forming an almost naked elongated thyrsus; bracts very small, linear; 

 calyx villous in the throat, about 3 mm. long, the teeth of its lower lip twice as 

 long as those of the upper; corolla light purple or almost white, about 8 mm. long. 

 In fields and waste places, Md. to S. Car., Ala., Ky. and Ark. Nat. from Europe. 

 June-Sept. 



3. Clinopodium Calamintha (L.) Kuntze. Calamint. Calamint Balm. 

 (I. F. f. 3148.) Perennial by creeping rootstocks ; 3-8 dm. high. Leaves broadly 

 ovate, petioled, obtuse at both ends or subacute at the apex, dentate or crenate- 

 dentate, 2-5 cm. long and nearly as wide; inflorescence as in the preceding species, 

 but commonly more leafy; calyx villous in the throat, 4-6 mm. long; corolla pur- 

 plish, 12-14 mm - l° n g- "Inclined to escape from cultivation in a few places" 

 (according to Gray). Native of Europe and Asia. June-Aug. 



4. Clinopodium Acinos (L.) Kuntze. Basil Thyme. Basil Balm. (I. F. 

 f. 3149.) Stems branched from the base, very slender, 1.5-2 dm. high. Leaves 

 oblong or ovate-oblong, petioled, acutish at both ends or the lower obtuse, crenulate 

 or entire, 8-16 mm. long; flowers about 6 together in the axils; bracts shorter than 

 the pedicels; calyx rough-hairy, longer than its pedicel, contracted at the throat, 

 its subulate teeth somewhat unequal; corolla purplish, 1^-2 times as long as the 

 calyx. In waste places, Ont. to Mass., N. Y. and N. J. Adventive from Europe. 

 May-Aug. 



5. Clinopodium glabrum (Nutt.) Kuntze. Low Calamint. (I. F. f. 3150.) 

 Perennial, stolon iferous, erect or ascending, 1-3 dm. high. Leaves of the flower- 

 ing branches linear, entire, short-petioled or sessile, mostly obtuse, obscurely veined, 

 8-18 mm. long, the margins slightly revolute; lower leaves and those of the stolons 

 shorter and broader, distinctly petioled; flowers 1-4 in the axils; pedicels filiform, 

 mostly longer than the calyx; calyx not gibbous, its throat pubescent in a ring 

 within, its lower teeth somewhat longer than the upper; corolla purple. On rocks 

 and banks, N. Y. and Ont. to 111., Minn., Mo. and Tex. May-Aug. 



6. Clinopodium glabellum (Michx.) Kuntze. Slender Calamint or 

 Bed's-FOOT. (I. F. f. 3151. ) Perennial, stoloniferous; stems spreading or decum- 

 bent, at length freely branched, 2-6 dm. long. Leaves membranous, oblong, short- 

 petioled, obtuse or the uppermost subacute, narrowed to a cuneate base, serrate 

 with low t^eth, 2-5 cm. long, 4- 16 mm. wide, the lowest and those of the stolons 

 sometimes shorter; axils 2-5 -flowered; pedicels commonly twice as long as the 

 calyx; calyx not gibbous, its throat pubescent in a ring within, its teeth nearly 

 equal; corolla purplish. On river banks, Ky. and Term. Rare and local. May- 

 Tuly. 



