772 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



1. Plants with tufted stems from a woody caudex; leaves mostly ovate or oval, 

 mostly 1 to 2.5 cm. long, entire or subentire; nutlets dark (3). 

 3. Pubescence minute, curled, essentially eglandular; nutlets dark, the pro- 

 tuberances flattened, giving the appearance of a mosaic. 



3. S. TESSELLATA. 



3. Pubescence spreading and obvious, often dense, more or less glandular; nut- 

 lets black, evenly and closely tuberculate 4. S. potosina. 



1. Scutellaria lateriflora L., Sp. PL 598. 1753. 



Beaver Creek, Oak Creek, Aultman, Fort Verde (Yavapai Comity), 

 about 3,000 feet, moist ground, August. Canada to Florida, New 

 Alexico, and central Arizona. 



These Arizona stations represent the southernmost extension of this 

 species. 



2. Scutellaria galericulata L., Sp. PL 599. 1753. 



Scutellaria epilobitfolia Hamilt., Soc. Linn. Lyon Ann. 1: 32. 

 1832. 



White Mountains (Apache Coimty), Lakeside (Navajo County), 

 Buck Springs (Coconino County), 6,000 to 7,500 feet, moist ground, 

 June to August. Widely distributed in temperate North America; 

 Eurasia. 



These stations in Arizona represent the southernmost extension of 

 this species. 



3. Scutellaria tessellata Epling, Wash. Acad. Sci. Jour. 29: 488. 



1939. 



Yavapai, Maricopa, Cochise, Santa Cruz, and Pima Counties, 

 mostly 4,000 to 6,000 feet, rocky slopes and canyons, type from the 

 Huachuca Mountains (Jones in 1903). Southern New Mexico and 

 Arizona. 



An ally of S. resinosa Torr. and $. wrightii A. Gray, separable from 

 them chiefly on the basis of the pubescence and nutlets and, to a less 

 extent, the habit of growth. 



4. Scutellaria potosina T. S. Brandeg., Calif. Univ. Pubs. Bot. 4: 



187. 1911. 



Gila, Maricopa, and Pinal Counties, 2,500 to 5,500 feet, April to 

 August. Central Arizona and Mexico. 



The Arizona form is subsp. platyphylla Epling. Specimens from 

 this State have commonly been referred to S. drummondii Benth., an 

 annual species of Texas with similar pubescence. 



7. MARRUBIUM. Hoarhound 



Perennial herbs with densely white -woolly stems and strongly 

 corrugate leaves; flowers crowded in subglobose verticils, these form- 

 ing interrupted spikes; calyx tubular, with 10 hooked teeth; corolla 

 white, small, the upper lip erect, notched, laterally reflexed; stamens 

 4, paired; nutlets black, somewhat roughened. 



1. Marrubium vulgare L., Sp. PL 583. 1753. 



Coconino, Yavapai, Graham, Gila, and Pinal Counties, a common 

 roadside weed in some places. Widely distributed in the United 

 States; naturalized from Europe. 



The hooked calyx teeth, at maturity, cling to wool and clothing. 

 The present use of hoarhound in medicine is limited almost entirely to 

 a confection for checking coughs and easing sore throat. It formerly 



