1534 CONTRIBUTIONS FROM THE NATION AI. HERBARIUM 



Branches villous; leaves oblong-lanceolate, acuminate, acute at base, serrate 

 near middle, harsh above; heads loosely cymose, long-pediceled; phyllaries 

 oblong, nearly equaling the disk. (Description compiled.) 



The name "tacote de flor" has been reported for the species. 



19. Montanoa purpurascens Robins. & Greenm. Proc. Amer. Acad. 34: 515. 

 1899. 



Eriocoma hartwegiana Kuntze, Rev. Gen. PL 1: 336. 1891, nomen nudum. 



Zacatecas to Guanajuato; type locality not definitely stated. 



Stem sordid-tomentose; leaf blades triangular-ovate or rhombic-ovate, 6 to 

 12.5 cm. long, 2 to 8 cm. wide, attenuate, cuneate at base, crenate-serrate, harsh 

 above, sordid-tomentose or tomentulose beneath; heads numerous; fruiting pales 

 broad, rather abruptly pungent-pointed. 



20. Montanoa arsenei Blake, Contr. U. S. Nat. Herb. 22: 611. 1924. 

 Known only from the type locality, near Morelia, Michoacan. 



Stem sordidly subtomentose-pubescent; leaf blades 6 to 12 cm. long, 1.5 to 4 

 cm. wide, acuminate, at base often very unequal, harsh above, rather densely 

 hispidulous-pilosulous beneath; heads numerous, about 2 cm. wide; pales in fruit 

 rather gradually narrowed to the spreading or reflexed cuspidate tip. 



21. Montanoa uncinata Schultz Bip.; C. Koch, Wochenschr. Gartn. 7: 406. 

 1864. 



Eriocomn uncinata Kuntze, Rev. Gen. PI. 1: 336. 1891. 



Michoacdn to Oaxaca; type from "Cumbre de Estepa." 



Shrub, up to 4 metefs high; branches soon glabrate or glabrescent; leaf blades 

 lance-ovate to rhombic-ovate, 6 to 12 cm. long, 2 to 6.5 cm. wide, caudate- 

 acuminate, cuneate or rounded at base, griseous-tomentose or tomentulose 

 beneath; heads numerous, about 2 cm. wide; pales broad, with short abrupt 

 spinescent tips. 



22. Montanoa patens A. Gray, Proc. Amer. Acad. 21: 388. 1886. 

 Sonoraand Chihuahua to Jalisco and Puebla; type from Batopilas, Chihuahua. 

 Shrub, up to 4 meters high; branches puberulent; leaf blades 9 to 25 cm. long, 



4 to 18 cm. wide, acuminate or attenuate, short-cuneate and often biauriculate at 

 base, green and scabrous above, paler and puberulent-tomentulose beneath; 

 heads numerous, about 2.5 cm. wide; pales broad, abruptly and shortly uncinate- 

 cuspidate. 



23. Montanoa pilosipalea Blake, Contr. U. S. Nat. Herb. 22: 612. 1924. 

 Known only from the type locality. Fort de La Guadalupe, near City of Puebla. 

 Stem sordidly pilose-tomentose; leaf blades triangular-ovate, 3.5 to 7 cm. long, 



1.3 to 4 cm. wide, subentire or usually coarsely 1 or 2-toothed or lobed on each 

 side near base, acuminate, short-cuneate at base, griseous-tomentose beneath; 

 heads numerous; rays 7 mm. long; fruiting pales loosely long-pilose and densely 

 pik)se-ciliate above, abruptly contracted into a firm, spreading or slightly recurved 

 cusp 1.5 to 1.8 mm. long. 



24. Montanoa subtruncata A. Grav in S. Wats. Proc. Amer. Acad. 22: 424. 



1887. 



Jalisco; type from Rio Blanco. 



Shrub, up to 4 meters high; stem somewhat puberulous; leaves slender-petioled, 

 the blades ovate or rhombic-ovate, 4.5 to 12 cm. long, 3 to 8 cm. wide, acuminate, 

 at base truncate-rounded to broadly subcordate, not auriculate, sometimes sinu- 

 ately 3 or 5-lobed, scabrous above, green beneath; heads numerous, 2.5 to 3.8 

 cm. wide; fruiting pales broad, abruptly mucronulate at the retuse apex. 



25. Montanoa affinis Blake, Contr. U. S. Nat. Herb. 22: 612. 1924. 

 Known only from the type locality. El Ocote, Michoacdn or Guerrero. 

 Shrub, 3 meters high; stem sparsely strigUlose; petioles slender, 1.5 to 4.5 cm. 



