138 TREES AND SHRtJBS 



LIPPIA. L. 



Branching shrub 2 to 3 ft. high, with slender stems; having' 



the internodes 2 or 3 times longer than the short-petioled, small, 



ovate, crenatc-serrate aromatic leaves, and terminal spikes of 



small white flowers; bracts ovate lanceolate, acuminate, about the 



length of the calyx; calyx about 2 mm. long lobes 4, acute, equal 



densely white-hirsute; corolla white about twice as long as the 



calyx, glabron- within: nutlets thin walled. 



1. L. urightii. 



LA B I ATA E. Mint Family. 



Aromatic herbs or shrubs, annual or perennial with 4-sided 



stems and opposite leaves; leaves simple, entire or variously toothed 



or incised; inflorescence of small cymose clusters in the axils of the 



normal or reduced leaves or in terminal spikes or heads; flowers 



perfect and irregular; calyx free, persistent, tubular or campanu- 



late, regular or irregular. Stamens 4 or by abortion 2; anthers 2- 



celled; ovary superior deeply 4-lobed. 4-celled; fruit 4 small nutlets 



in the persistent calyx. 



Upper lip of the bilabiate corolla flat not con- 

 cave; calyx regularly 5-toothed. 1. Poliomintha. 



Upper lip of the bilabiate corolla more or less 

 concave; calyx 2-lipped, the upper lip ob- 

 scurely 3-toothed or entire, the lower 2- 

 toothed. - Salvia. 



I. POLIOMINTHA Gray. 



Hoary canescent shrub about 3 feet high, with entire linear 

 oblong to lanceolate nearly sessile leaves about % inch long; flowers 

 in small axillary clusters towards the ends of the stems, subtended 

 by reduced bract-like leaves; calyx broad tubular with 5 narrow, 

 equal teeth, densely villous with spreading white hairs; corolla pale 

 purplish, tube surpassing the calyx, throat gaping; fertile stamens 2, 

 and 2 rudimentary filaments. 



1. P. ineana. 



2. SALVIA Lir- 



>inn. 



Annual or perennial herbs or shrubs. 3 feet high or less, with 

 opposite petiolatc glandular leaves and flowers in terminal paniculate 

 or crowded verticillate clusters; calyx tubular or campanulate, 



