1616 CONTBIBUTIONS FROM THE NATIONAL HERBAEIUM 



Involucre 4 to 6 mm. high, the phyllaries acute or acuminate; leaves mostly 

 erect 1. P. diffusa. 



Involucre usually 5 to 8 mm. high, the phyllaries rounded or obtuse, rarely 

 acutish; leaves wide-spreading. 

 Phyllaries broadly oval, 3 to 5 mm. wide, with strongly overlapping margins. 



2. P. latisquama. 

 Phyllaries linear to oblong, 2.5 mm. wide or less. 



Leaves obovate-oblong, 4 to 10 mm. wide 3. P. llebmannii. 



Leaves linear or lance-linear, 1 to 4 mm. wide. 



Branches pubescent 4. P. saturejaoides. 



Branches glabrous 5. P. stenophylla. 



1. Pectis diffusa Hook. & Arn. Bot. Beechey Voy. 296. 1840. 

 Jalisco and Colima; type from Jalisco. 



Suffruticulose, spreading or erectish, 25 cm. long or less; leaves linear, 2 to 

 4 cm. long, 1 to 3 mm. wide, setose-ciliate mostly below the middle; heads solitary 

 in the upper axils, slender-peduncled, 1 to 1.5 cm. wide; involucre slender; 

 pappus of 4 to 20 unequal bristles. 



2. Pectis latisquama Schultz Bip.; Greenm. Proc. Amer. Acad. 39: 118. 1903. 

 Puebla and State of Mexico; type from Valley of Mexico. 

 Suffruticulose, depressed ; branches puberulous; leaves linear-lanceolate, 1 to 



2 cm. long; heads short-peduncled, 1.5 cm. wide; phyllaries very broad, blunt, 

 ciliate at apex, purplish; rays yellow or purplish-tinged; pappus of ray and disk 

 of numerous bristles. 



3. Pectis liebmannii Schultz Bip.; Hemsl. Biol. Centr. Amer. Bot. 2: 226. 



1881. 



Jalisco; type from San Agustfn. 



Suflfruticose, procumbent, 20 to 30 cm. long, canescent-tomentose or lanate; 

 leaves 1.5 to 2.5 cm. long, with several long basal setae; peduncles very short; 

 ray achenes epappose; disk achenes with a pappus of 20 to 30 unequal bristles. 

 (Description compiled.) 



4. Pectis saturejaoides (Mill.) Schultz Bip. in Seem. Bot. Voy. Herald 309. 



1856, as P. satureioides. 



Inula saturejaoides Mill. Gard. Diet. ed. 8. Inulg, no. 13. 1768. 



Pectis canescens H. B. K. Nov. Gen. & Sp. 4: 263. 1820. 



Lorentea auricularis DC. Prodr. 5: 102. 1836. 



Pectis auricularis Schultz Bip. in Seem. Bot. Voy. Herald 309. 1856. 



Pectis canescens villosior Coulter, Bot. Gaz. 20: 52. 1895. 



Pectis repens T. S. Brandeg. Zoe 5: 241. 1906. 



Sinaloa to San Luis Potosf, south to Chiapas; type from Veracruz. Guatemala 

 to Nicaragua. 



Suffruticulose, erectish or prostrate; leaves 1 to 2 cm. long; heads 1.5 to 2.2 cm. 

 wide, the rays yellow or purplish-tinged; pappus very variable in the ray, of about 

 20 or fewer bristles (2 or 3 sometimes thickened and awnlike), or of squamellae, 

 or wanting, in the disk of about 20 slender bristles. 



5. Pectis stenophylla A. Gray, Proc. Amer. Acad. 21: 393. 1886. 

 Sonora and Chihuahua; type from Batopilas, Chihuahua. 



Suffruticose below, diffusely branched; leaves 3 to 4 cm. long, 1 to 2 mm. wide, 

 bristly toward base; peduncles fiUform, 3 to 6 cm. long; pappus of ray achenes of 

 2 slender bristles, of the disk achenes of 20 to 40 slender, unequal bristles. 



