WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 551 
2. Phyla cuneifolia (Torr.) Greene, Pittonia 4: 47. 1899. 
Zapania cuneifolia Torr. Ann, Lyc. N. Y. 2: 234, 1827. 
Lippia cuneifolia Steud. in Marcy, Expl. Red Riv. 293, 1854. 
Type Locauity: “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, I'l. Southeast. U.S. 1012. 1903. 
Type Locality: Near Corpus Christi, Texas. 
Rance: 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 shrubs 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 free, 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 upper lip much reduced. 
Flowers in a terminal spikelike inflorescence; 
leaves merely toothed, not pinnatifid..... 1. Teucrrum (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........------------- eee eee eee 4. TRICHOSTEMA (p. 594). 
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. 5959). 
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. MARRUBIUM (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 ; 
bracted heads.......-------- 9. MADRONELLA (p. 556). 
