1614 COXTKIBUTIONS FROM THE NATIONAL HERBARIUM 



18. Porophyllum gracile Benth. Bot. Voy. Sulph. 29. 1844. 

 Porophyllum caesium Greene, Leaflets 2: 155. 1911. 



Baja California and islands; Sonora; type from Magdalena Bay, Baja Cali- 

 fornia. Southern California. 



Shrubby, much branched, sometimes glaucous; leaves linear or linear-filiform, 

 1 to 5.5 cm. long, 1.5 mm. wide or less; heads loosely cymose-panicled, 1.3 to 

 1.5 mm. high; phyllaries 2 mm. wide or less. "Hierba del venado" (Baja 

 California). 



The bitter decoction of the leaves is administered for intestinal affections. 



19. Porophyllum pinifolium Rydb. N. Amer. Fl. 34: 192. 1916. 

 Sonora and Cape region of Baja California; type from Alamos, Sonora. 



Low much-branched shrub; leaves hnear-filiform, 2 to 4 cm. long, about 0.5 

 mm. wide; heads solitary; involucre light green; corollas cream-colored, purple- 

 streaked. 



20. Porophyllum maritim.um T. S. Brandeg. Zoe 5: 162. 1903. 



Southern Baja California; type collected between Cape San Lucas and San 

 Jos6 del Cabo. 



Low, shrubby, strongly glaucous; leaves thick, 2 to 3.8 cm. long, about 2 

 mm. wide; involucre strongly glaucous, 11 mm. high; achenes tapering above, 

 about 8 mm. long. 



21. Porophyllum amplezicaule Engelm.; A. Gray, PI. Wright. 1: 120. 1852. 

 Coahuila; type from Mesillas. 



Suffruticose, glaucous; leaves ovate-lanceolate, 2 to 3 cm. long, about 8 mm. 

 wide at base, semiamplexicaul, fleshy; heads solitary; flowers yellow. (De- 

 scription comi)iIed.) 



22. Porophyllum scoparium A. Gray, PI. Wright. 1: 119. 1852. 

 Porophyllum fruticulosum Rydb. N. Amer. Fl. 34: 193. 1916. 

 Chihuahua and Coahuila. Texas and New Mexico; type from San Pedro 



River, Texas. 



Shrubby, up to 60 cm. high, much branched, somewhat glaucous; leaves 

 filiform or linear-filiform, 1 to 5.3 cm. long, 1 mm. wide or less; heads solitary 

 at tips of branchlets, about 1.3 cm. high; phyllaries 2 mm. wide or less. "Hierba 

 del venado" (Coahuila); "jarilla;" "romerillo" (Coahuila). 



The plant is employed locally as a remedy for fevers, rheumatism, and affections 

 of the stomach and intestines. 



23. Porophyllum greggii A. Gray, PI. Wright. 1: 120. 1852. 

 Coahuila; type from Parras. Texas. 



Suffruticose, 20 to 30 cm. high; heads solitary at tips of branches; phyllaries 

 elliptic or obovate-oblong; achenes 5 mm. long, not tapering above. (Descrip- 

 tion compiled.) 



24. Porophyllum crassifolium S. Wats. Proc. Amer. Acad. 24: 57. 1889. 

 Porophyllum leptophyllum I. M. Johnston, Proc. Calif. Acad. IV. 12: 1210. 



1924. 

 Porophyllum tridentatum crassifolium I. M. Johnston, Proc. Calif. Acad. IV. ' 



12: 1211. 1924. 

 Baja California and islands; type from Muleje. 



Low, shrubby, much branched; leaves linear to elliptic, 5 to 20 mm. long, 

 0.8 to 3 mm. wide, sessile, cuspidate; heads solitary at tips of branches and 

 branchlets, 9 to 13 mm. high; phyllaries round-tipped or obtuse, 2.5 to 4.5 mm. 

 wide. 



25. Porophyllum tridentatum Benth. Bot. Voy. Sulph. 30. 1844. 

 Baja California; type from Magdalena Bay. 



Similar to P. crassifolium; leaves coarsely 3 or 5-toothed, the teeth usually 

 cuspidate. 



