Mentha. LABIATE. 351 



8. COLLINSONIA, L. Housk-Balm, Citronella. {Peter Collin- 

 son of Loiuloii, who corresponded with Liniuiius and John Bartram, and received 

 from the hitter the orighial species.) — Odorous and large-leaved perennials (of 

 Atlantic North America) ; with thickened roots or rootstocks, ovate and serrate 

 veiny leaves, mostly on long petioles, and simple or panicled naked terminal 

 racemes of yellow or whitish llowers ; mostly only a single naked pedicel to each 

 small bract. 



* Fertile stamens 2; upper pair riidiinentary or obsolete: calyx-teeth all subulate-acute: flowers 

 in late summer or aulumn, ou slender pedicels, solitary from the axil of each small subulate bract. 



C. SCabriuscula, Ait. Glabratc or minutely pubescent, 1 to feet liigii from a tuberous 

 stock, coaiiiu)iily leafless below : leaves small for the genus (2 or 3 inches long), broadly 

 ovate, often rather scabrous above : corolla 3 or 4 lines long, yellowish or purple-spotted. 

 — Ait. Kew. ed. 1, i. 47 (178!)) ; Benth. Lab. & in DC. Prodr. xii. 253. C. pncco.r, Walt. Car. 

 65? (1783), but not early Howering. C. lulicrosa, U'lchx. Fl. i. 17. C. srabni, Ters. Syn. 

 i. 29; Piirsh, Fl. i. 20; Ell. Sk. i. 35. C. ocalis, Tursh, I.e., from the char.? — Open 

 woods, S. Carolina to Florida and E. Arkansas. 



C. Canadensis, L. ( IIousi:-wekd, Stonk-uoot, &e.) Glabrous, or the inflorescence 

 glandidar-puberulent, 2 to 4 feet high, leafy: leaves ample (4 to 9 inches long), from 

 broadly ovate to oblong, rarely subcordate : racemes amply paniculate : calyx in flower a 

 line, in fruit 4 or 5 lines long: corolla lemon yellow, lemon-scented, 5 or G lines long. — 

 Hort. Cliff, t. 5, & Spec. i. 28; Torr. Fl. N. Y. t. 75. C. (h-russatd, Muench, Meth. 379. C. 

 ovdlis, Pursh, I. c. & herb., ex Benth. — Rich woods, Canada to Wisconsin and south to 

 Florida, chiefly in the upper country. 



Var. punctata. Inflorescence more puberulent and glandular: loaves minutely 

 tomentose-pubescent beneath and more obviously punctate. — C. serollna, Walt. Car. (35. 

 C. punctata, Ell. Sk. i. 30. — Kich soil, Carolina and Georgia, towards the coast. 



# -IK Fertile .stamens 4, usually 2 ascending and 2 descending : corolla rather broader, about half 

 inch long, viscid-pubescent: flowers earlier. 



C. verticillata, Baldw. Stem a foot high, leafless and glabrous below, at sunnnit 

 bearing two approximate pairs or a seeming whorl of thin and large (3 to 7 inch) ovate 

 coarsely serrate and glabrous leaves : peduncle mostly simple and slender, viscid-pubes- 

 cent, supporting a single raceme : bracts minute : lower pedicels often in pairs or threes: 

 calyx-teeth all attenuate-subulate : corolla yellow or purplish. Ell. Sk. i. 37 ; Benth. Lab. 

 & in DC. I. c. ; Chapm. Fl. 31(5. — Kieh woods, western part of S. Carolina and Georgia to 

 Tennessee and Mississippi : fl. May. 



C. anisata, Sims. (Cituonkll.v, Frknch Tk.v.) Copiously viscid-pubescent, or the 

 foliage glabrate, sweet-scented: stem 2 or 3 feet high, leafy : leaves ovate, rarely subcord- 

 ate, obtusely serrate, veiny, somewhat rugose, 3 to 8 inches long: racemes paniculate; 

 bracts ovate, conspicuous, mostly subtending single short pedicels : upper lip of calyx with 

 very broad and ovate mostly obtuse teeth ; those of the lower lanceolate : corolla yellow- 

 ish or cream-color. — Bot. Mag. t. 1213; I'ursh, Fl. i. 21; Ell. Sk. i. 37. — S. CaroUna to 

 Alabama and Florida, chiefly in the middle country : fl. sunnner. 



9. MENTHA, Tourn. Mint. (Mt'i'dtj, the ancient Greek name.) — Odorous 

 perennial hcrhs, mostly spreading by slender creeping rootstocks : caly.x naked at 

 the throat in our species. Flowers small, whitish or purplish, glomerate (in 

 summer), not rarely gynodicccious, i.e. some individuals produce female llowers 

 with impotent stamens instead of perfect ones. 



* Introduced fi'om the Old World, to which most of the .species belong. Many hybrids. 



•i- Inflorescence terminal. 



++ Densely c-aiiitate glomcrules all much crowded in leafless narrow spikes: leaves cither sessile or 

 very sh(jrt ])etioled. 



M. sYLVESTKis, L. (Ilousn MiNT of Eu.) Finely pubescent or cancscent: leaves from 

 ovate-oblong to oblong-lanceolate, .acute, sliarply serrate, often glabrous above : s])ike.s 

 rather slender, canescently pubescent or cinereous. — Spec. ed. 2, ii. 801; Engl. Bot. ed. 



