348 Labiatae 



or wanting ; anther-sacs parallel. Ovary deeply 4-parted ; 

 style slender, 2-cleft. Nutlets truncate at the summit, 

 narrowed below, trigonous, smooth. 



1. Ij. lucidus Turcx. Pubescent or glabrate, perennial by 

 stolons ; stem usually stout, erect, strict, leafy, simple or some- 

 times branched, 3-9 dm. high; leaves oblong-lanceolate, acute at 

 the apex, narrowed or rounded at the base, sessile or nearly so, 

 5-15 cm. long, sharply serrate; bracts ovate or lanceolate, acu- 

 minate-subulate, the outer ones often as long as the flowers; 

 calyx-teeth 5, subulate-lanceolate, nearly as long as the tube ; 

 corolla slightly exceeding the calyx ; rudimentary stamens slen- 

 der, thickened at the apex ; nutlets much shorter than the calyx. 



Occasional along stream banks in the San Bernardino Valley, Parish. 



12. MENTHA L. 



Erect or diffuse aromatic herbs with simple mostly 

 punctate leaves, and small whorled flowers, the whorls 

 axillary or in terminal dense or interrupted spikes. 

 Calyx campanulate to tubular, 10-nerved, regular or 

 slightly bilabiate, 5- toothed. Corolla-tube shorter than 

 the calyx, the limb 4-cleft, somewhat regular, the pos- 

 terior lobe usually somewhat broader than the others, 

 entire or emarginate. Stamens 4, equal, erect, included 

 or exserted ; filaments glabrous ; anthers 2-celled, the 

 sacs parallel. Ovary 4-parted ; style 2-cleft. Nutlets 

 ovoid, smooth. 



1. M. piperita L. (PEPPERMINT.) Perennial by subterranean 

 suckers; stems glabrous or sparsely puberulent, mostly erect, 

 branched, 3-9 dm. high ; leaves ovate-oblong to oblong-lanceolate, 

 narrowed or rounded at the base, petioled, acute at the apex, 

 sharply serrate, glabrous except the veins beneath; whorls of 

 flowers in terminal, dense or interrupted spikes, 2.5-7 cm. long in 

 fruit ; calyx tubular-campanulate, its teeth subulate, ciliate, half 

 as long as the tube or more ; corolla glabrous. . f 



Occasional along streams about Los Angeles and Santa Ana. August- 

 December. 



