FLOWERING PLANTS AXD FERNS OF ARIZONA 773 



was used in domestic medicine for colds and dyspepsia, and to expel 

 worms. 



8. AGASTACHE. Giant-hyssop 



Perennial herbs, with short sparse pubescence; leaves deltoid, 

 crenate, at least at the base of the plant ; flowers either in pedunculate 

 cymules, these disposed in a slender spare panicle, or sessile in verti- 

 cils, these forming an interrupted or dense spike; calyx tubular, 5- 

 toothed, the teeth usually thin and membranaceous, less often subu- 

 late and somewhat rigid, deltoid, or attenuate, subequal; corolla 

 pallid or rose-colored, tubular, arcuate, somewhat hooded, the lips 

 subequal; stamens 4, slightly exserted from the corolla tube. 



A widespread genus of North America, centered in the southwestern 

 United States, but of Eurasian affinities. The species are apparently 

 localized. 



Key to the species 



1. Leaves (only the basal ones) deltoid, the upper and floral leaves linear, 

 entire, 4 to 5 mm. wide; flowers reddish, in pedicellate cymules, not 



crowded; corolla tube 2 cm. or longer 1. A. rupestris. 



1. Leaves all deltoid-ovate (2). 



2. Calyx 3 to 3.5 mm. long, the teeth and the tube subequal, the teeth whitish; 



corolla tube 4 to 4.5 mm. long 3. A. wrightii. 



2. Calvx 5 to 11 mm. long, the teeth shorter than the tube; corolla tube 6 to 

 '23 mm. long (3). 

 3. Flowers in pedicellate cymules, not crowded; calyx 11 mm. long; corolla 



tube 17 to 23 mm. long 2. A. barberi. 



3. Flowers in verticillate spikes; calyx 5 to 8 mm. long; corolla tube 6 to 13 

 mm. long (4). 

 4. Corolla tube 6 to 8 mm. long; calyx teeth 1.5 mm. long. 



4. A. BREVIFLORA. 



4. Corolla tube 10 to 13 mm. long; calyx teeth 2 to 4 mm. long (5). 



5. Flowers pallid, the calyx greenish or dull white. 5. A. pallidiflora. 

 5. Flowers purple, the calyx reddish or purple 6. A. xeomexk axa. 



1. Agastache rupestris (Greene) Standi., Contrib. U. S. Natl. Her- 



barium 13: 212. 1910. 



Cedronella rupestris Greene, Pittonia 1: 164. 1888. 



Near Payson and in Barnhart Pass, Mazatzal Mountains (Gila 

 County), Baboquivari Mountains (Pima County), 4,000 to 5,000 

 feet. Southwestern Xew Mexico, and central and southern Arizona. 



2. Agastache barberi (Robinson) Epling, Wash. Acad. Sci. Jour. 29: 



489. 1939. 



Brittonastrum barberi Robinson, Amer. Acad. Arts and Sci. 

 Proc. 43: 24. 1907. 



Patagonia Mountains (Santa Cruz County), about 5,000 feet 

 (Peebles and Harrison 4748, Kearney and Peebles 10122). Southern 

 Arizona and northern Mexico. 



Flowers showy for the genus, lavender purple. 



3. Agastache wrightii (Greenm.) Woot. and Standi, Contrib. U. S. 



Natl. Herbarium 16: 168. 1913. 



Cedrondla wrightii Greenm., Amer. Acad. Arts and Sci. Proc. 

 41: 244. 1905. 



Gila, Pinal, Cochise, Santa Cruz, and Pima Counties, commonly 

 4,000 to 6,000 feet, rich soil, canyons and slopes, June to October. 

 Southern New Mexico, southern Arizona, and northern Mexico. 



