STANDLEY TREES AND SHEUB3 OF MEXICO 1641 



18. Trixis radialis (L.) Kuntze, Rev. Gen. Pi. 1: 370. 1891. 

 Inula trixis L. Amoen. Acad. 5: 406. 1759. 



Perdicium radiale L. Sp. PI. ed. 2. 1248. 1763. 



Trixis inula Crantz, Inst. Herb. 1: 329. 1766. 



Perdicium laevigatum Berg. Act. Holm. 33: 238. pi. 7. 1772. 



Perdicium havanense H. B. K. ;^ov. Gen. & Sp. 4: 155. 1820. 



Trixis frutescens P. Br.; Spreng. Syst. Veg. 3: 501. 1826. 



Trixis laevigata Lag.; Spreng. Syst. Veg. 3: 501. 1826. 



Trixis havanensis Spreng. Sj'st. Veg. 3: 501. 1826. 



Prenanthes fruticosa Willd.; Less. Linnaea 5: 33. 1830, as synonym. 



Trixis glabra D. Don, Trans. Linn. Soc. 16: 297. 1830. 



Trixis frutescens obtusifolia Less. Syn. Gen. Comp. 414. 1832. 



Trixis frutescens glabrata Less. Syn. Gen. Comp. 414. 1832. 



Trixis frutescens subglabra Kuntze, Rev. Gen. Pi. 1: 370. 1891. 



Tamauiipas and Tepic, soutli to Yucatdn and Cliiapas. Guatemala to Panama; 

 West Indies, Soutli America; Texas; type from Jamaica. 



Much-branched shrub, the branches glabrous or somewhat pubescent; leaves 

 usually elliptic, varying to lanceolate or oval, 3 to 10 cm. long, 1 to 3.5 cm. 

 wide, entire or dentate, glabrous or sparsely pubescent especially on the costa 

 beneath; heads numerous, rather crowded, 1.5 to 2 cm. high; outer phyllaries 

 mostly linear or lance-linear, usually half or two-thirds as long as the inner. 

 "Tokabdn," "tokabal" (Yucatdn); "plumilla" (Chiapas); "hierba del aire" 

 (Veracruz); "falsa Arnica" {Urbina); "Juan de calle," "drnica de monte," 

 ''chucha" (Colombia); "palo de Santa Maria" (Panama); "diente de le6n" 

 (Nicaragua); "San Pedro," "Santo Domingo," "tuldn verde," "Carmen" 

 (El Salvador). 



The plant is used locally as a remedy for diabetes, sores, and venereal diseases. 



19. Trixis wrightii Robins. & Greenm. Proc. Amer. Acad. 40: 14. 1904. 

 Sinaloa and Tres Marias Islands; type from Mazatldn. 



Similar to T. radialis; branches sometimes obscurely winged; heads 1.5 to 

 1.8 cm. high; outer phyllaries up to 7 mm. wide. 



DOUBTFUL SPECIES. 

 Trixis pipitzahuac Schaffner; Herrera, Naturaleza 3: 407. 1876, nomen 

 nudum. This name, never published in connection with a description, probably 

 refers to one of the well-known species of the genus. The vernacular name is 

 given as "pipitzahoac," and the roots are said to contain a resinous substance 

 used as a drastic. 



112. JUNGIA L. f. Suppl. PL 58, 390. 1781. 

 1. Jungia pringlei Greenm. Field Mus. Bot. 2: 286. 1907. 



Michoacdn; type from Uruapan. 



"Shrub 3 meters high," glandular-pubcrulous and somewhat pilose; leaves 

 alternate or the upper subopposite, petioled, the blades of the larger oval-ovate 

 or orbicular-ovate, about 12 cm. long, shallowly about 7-lobed, cordate or sub- 

 cordate at base, pubescent beneath like the stem and reticulate; heads numerous, 

 in large panicles, whitish, about 1 cm. wide; involucre nearly 1-seriate, equal, 

 about 7 mm. high; receptacle paleaceous; corollas all bilabiate, the outer lip 

 3-toothed, the inner bifid; achenes about 3 mm. long; pappus silvery-white, of 

 barbellate bristles 5 mm. long. 



