MINT FAMILY 645 



3-9 cm. long, subcordate or truncate to cuneate at base, obtuse or acutish at apex, thin and 

 smoothish in shade, thicker and often strongly net-veined and rugose in exposed environments; 

 flowers solitary in the upper axils, on short pedicels; calyx campanulate, 10-15 mm. long, villous 

 below with forked branched hairs, cleft to about the middle into 5 triangular or triangular-lanceo- 

 late teeth, somewhat enlarged and slightly membranous in fruit; corolla purplish-blotched and 

 -veined, 25-30 mm. long and half as broad. 



Canyons and hillsides, Upper Sonoran and Transition Zones; Santa Rosa, Santa Cruz, and Santa Catalina 

 Islands; and in the California Coast Ranges from Lake and Sonoma Counties to Ventura County, and in the 

 Sierra Nevada foothills from Butte County to Mariposa County. Type locality: California. Collected by 

 Douglas. April-June. 



Lepechinia fragrans (Greene) Epling, Brittonia 6: 362. 1948. {Sphacele calycina var. Wallacei A. Gray, 

 Bot. Calif. 1: 598. 1876; J. fragrans Greene, Pittonia 1: 38. 1887; 5". cordifoUa Gandoger, Bull. Soc. Bot. 

 Fr. 65: 68. 1918; Lepechinia calycina var. Wallacei Epling in Munz, Man. S. Calif. 447. 1935.) Characterized 

 by the deltoid or subhastate leaves, conspicuously dense villous-tomentose herbage and membranous, lanceolate 

 calyx-teeth. Canyons, Upper Sonoran Zone; Santa Rosa, Santa Cruz and Santa Catalina Islands and occasionally 

 in the San Gabriel and Santa Monica Mountains on the mainland of southern California. Type locality: Los 

 Angeles. 



Lepechinia cardiophylla Epling, loc. cit. Leaves strongly cordate at base, broadly ovate; calyx-teeth 

 broadly triangular, shorter than the calyx-tube. Santa Ana Mountains, at 3,000-4,000 feet altitude, Orange 

 County, California. Type locality: Indian Canyon. 



Lepechinia GSnderi Epling, op. cit. 363. Leaves glabrous above, puberulent below, narrowed toward the 

 base; calyx-teeth acicular, rigid, nearly equaling the calyx-tube. Otay Mountain, San Diego County, California, 

 and probably extending into adjacent Lower California. Type locality: Otay Mountain, 3,000 feet altitude. 



18. HEDEOMA Pers. Syn. PI. 2: 131. 1807. 



Annual or perennial, strongly aromatic herbs. Leaves small, entire or toothed, sessile 

 or short-petioled. Flowers small, blue or purple, in small cymules or solitary in the axils 

 of the upper leaves. Calyx tubular, 13-nerved, 5-toothed and more or less 2-lipped, the 

 upper 3 teeth united below the middle, the lower 2 distinct and a little longer than the 

 upper. Corolla 2-lipped, the upper lip erect, entire, emarginate or 2-lobed, the lower 

 2-cleft. Anther-bearing stamens 2, ascending under the upper lip, the 2 sterile stamens 

 reduced to staminodia or wanting. Style 2-cleft at apex, glabrous. Nutlets ovoid, smooth. 

 [Name Greek, meaning sweet odor.] 



An American genus of about 25 species. Type species, Melissa pxdegioides L. 



1. Hedeoma nana (Torr.) Briq. Dwarf Pennyroyal. Fig. 4421. 



Hedeoma dentata var. nana Torr. Bot. Mex. Bound. 130. 1859. 



Hedeoma thymoides A. Gray, Syn. Fl. N. Amer. 2^ : 362. 1878. Not Pers. 1807. 



Hedeoma nana Briq. in Engler & Prantl, Nat. Pflanzenf. 43» : 294. 1897. 



Low tufted perennial, much-branched from a simple or somewhat branched woody root 

 crown, 10-20 cm. high, herbage pale green or sometimes purple-tinged; stems slender, puberulent 

 with short retrorse hairs. Leaves ovate to oblong-ovate, 4-8 mm. long, entire, short-petioled, 

 glabrate above, rather sparsely puberulent and glandular-dotted beneath ; upper axils with 1 or 

 2 short, minutely branched peduncles, each bearing 1-2 short-pedicelled flowers ; calyx tubular, 

 5-6 mm. long, including the subulate-aristate teeth, becoming slightly restricted at throat, and 

 somewhat gibbous below on the lower side, short-pubescent with spreading and slightly curved 

 upward hairs ; corolla 7-8 mm. long, light purple, the lower lip with a white blotch, purple-lined. 



Desert slopes, often in rock crevices. Lower Sonoran Zone; in California known only from the following 

 mountain ranges of the Mojave Desert: Kingston, Providence, and Clark. These plants have been segregated 

 out as subspecies californica W. S. Stewart, Rep. Spec. Nov. Beih. 115:29. 1939. The typical species is 

 more loosely branched and usually more densely covered with slightly longer pubescence. It ranges from Ari- 

 zona and Nevada to western Texas and adjacent Mexico, and the original or type specimens were collected 

 on the rocky banks of the Rio Grande, near El Paso, Texas. April-June. 



19. MELISSA [Tourn.] L. Sp. PI. 592. 1753. 



Herbs with broad dentate leaves and rather small white or yellowish flowers in axil- 

 lary clusters. Calyx tubular-campanulate, declined in fruit, 13-nerved. nearly naked in 

 the throat, bilabiate, upper lip 3-toothed, flat, the lower 2-parted. Corolla-tube exserted, 

 curved-ascending, enlarged above, glabrous within ; limb bilabiate, upper lip emarginate, 

 erect, the lower spreading 3-lobed. Stamens 4, didynamous, ascending under the upper 

 lip of the corolla; anther-sacs divaricate. Style 2-cleft, the lobes subulate. Nutlets ovoid, 

 smooth. [Name Greek, meaning bee.] 



A genus of about 4 species, inhabiting Europe and western Asia. Type species, Melissa officinalis L. 



1. Melissa Officinalis L. Garden or Lemon Balm. Fig. 4422. 



Melissa officinalis L. Sp. PI. 592. 1753. 



Lemon-scented perennial, with rather stout, erect or ascending stems, 4-8 dm. high, puberu- 

 lent, the branchlets, leaves and calyces also more or less villous. Leaves ovate, petioled, obtuse 

 to subcordate at base, obtuse or acutish at apex, 2-8 mm. long, coarsely crenate-dentate or den- 



