WOOTON AND STANDLEY FLORA OF NEW MEXICO. 



551 



2. Phyla cuneifolia (Torr.) Greene, Pittonia 4: 47. 1899. 

 Zapania cuneifolia Torr. Ann. Lye. N. Y. 2: 234. 1827. 

 Lippia cuneifolia Steud. in Marcy, Expl. Red Riv. 293. 1854. 

 Type locality: "On the Platte." 



Range: Wyoming and South Dakota to Texas and northern Mexico. 

 New Mexico: Rio Zuni; Red Lake; Nara Visa; Sierra Grande. Upper Sonoran 

 Zone. 



3. Phyla incisa Small, Fl. Southeast. U. S. 1012. 1903. 

 Type locality: Near Corpus Christi, Texas. 

 Range: Western Texas to southern California. 



New Mexico: Socorro; Deming; Mesilla Valley; White Sands. Chiefly in adobe 

 soil, in the Lower Sonoran Zone. 



125. MENTHACEAE. Mint Family. 



Aromatic herbs or shi-ubs with 4-sided stems and opposite leaves; leaves simple, 

 entire or toothed; inflorescence of small cymose clusters in the axils of the normal 

 or reduced leaves or in terminal spikes or heads; flowers perfect, irregular, rarely 

 nearly regular; calyx fi-ee, persistent, tubular or campanulate, regular or irregular, 

 5-toothed; corolla usually bilabiate; stamens 4 or by abortion 2; anthers 2-celled; 

 ovary superior, deeply 4-lobed, 4-celled; fruit of 4 small nutlets in the persistent 

 calyx. 



KEY TO the genera. 



Ovary of 4 united carpels, 4-lobed; style not basal; nut- 

 lets attached to each other along the inner angle. 

 Corolla very irregular, the upjDer lip much reduced. 

 Flowers in a terminal spikelike inflorescence; 



leaves merely toothed, not pinnatifid 1. Teucrium (p. 553). 



Flowers solitary, axillary to leaflike bracts; 



leaves deeply pinnatifid 2. Melosmon (p. 553). 



Corolla nearly regular, the lobes almost alike. 



Flowers in small axillary cymose clusters 3. Tetraclea (p. 553). 



Flowers in thyrsoid panicles at the ends of the 



stems 4. Trichostema (p. 554). 



Ovary of 4 distinct or nearly distinct carpels; styles basal; 

 nutlets attached at or near the base. 

 Corolla nearly regular, 4 or 5-toothed. 



Anther-bearing stamens 4 5. Mentha (p. 554). 



Anther-bearing stamens 2 6. Lycopus (p. 555). 



Corolla conspicuously bilabiate. 



Calyx 2-lipped, the lips entire, the upper ones 



crested; stamens 4 7. Scutellaria (p. 555). 



Calyx with more than 2 divisions, not crested; 

 stamens 4, or by abortion 2. 



Stamens included in the corolla tube 8. Marrubitjm (p. 556). 



Stamens more or less exserted. 



Upper lip of the corolla flat, not concave. 

 Stamens straight, distant and diverg- 

 ing; calyx almost regularly 5- 

 toothed; anther-bearing sta- 

 mens 4; flowers in terminal 

 tracted heads 9. Madronella (p. 556). 



