APRIL, 1904. PLANTS YUCATAN/E MILLSPAUGH & CHASE. 149 



corollas narrow, scarcely labiate. Receptacle subconvex. Achene 

 light brown, .6x5-7 mm., lanceolate, tapering into a slender neck 

 nearly as long as the body; in section, concavo-convex; faintly 5 

 nerved, sparsely glandular, hirtellous; pappus bristles pinkish tawny, 

 nearly smooth, 9 mm. long. 



Hab. Yot Oonot, 12 inches high, only three specimens seen, 

 Gaumer 1334. 



TRIXIS P. Br. Hist. Jam., 312. 



Heads homogamous, flowers perfect, fertile, all with bilabiate 

 corollas, the lower lip larger in the marginal flowers, elongated and 

 radiatiform. Involucre cylindrical, of i series of equal bracts (in our 

 species) little or not at all imbricated, subtended by a few foliaceous, 

 loose, accessory bracts. Receptacle small, pilose. Achene dorsally 

 compressed, linear; pappus of copious, slender bristles. Perennial 

 herbs or shrubs with paniculately cymose heads of yellow flowers. 



Trixis frutescens P. Br. Hist. Jam., 312 t. 33, f. i. 



An erect shrub with pale, terete, striate stem and branches, and 

 alternate, short-petioled, ovate, elliptic or obovate, mucronate leaves, 

 entire or sinuate-dentate. Inflorescence a leafy cymose panicle, the 

 branchlets divaricate, striate, puberulent. Heads 18 mm. high, 12-15 

 mm. broad, 12-20 flowered, on rigid divaricate, bracteate peduncles. 

 Involucral bracts appressed, linear-oblong, mucronate, sparingly 

 puberulent, the summit ciliolate, accessory bracts linear lanceolate, 

 nearly glabrous. Corollas yellow, those of the marginal flowers with a 

 spreading, oblong, 3-dentate low- 

 er lip and a 2-cleft upper lip, the 

 divisions recurved ; inner corollas 

 similar but divisions all equal and 

 erect. Receptacle densely pilose. 

 Achene brown, .6x6-6.5 mm -, 

 linear-oblong, slightly narrowed 

 toward the summit; in section 

 oval; faintly striate, pubescent 

 with short stipular, glandular 

 hairs; pappus bristles pale yel- 

 low, minutely upwardly scabrous, 

 9 mm. long. 



Hab. Merida, Feb. 2, 1865, 

 Schott 189; apex of the Cerro 

 'Grande, Izamal, Jan. 13, 1895, 

 Millspaugh Armour Exped. 56 

 (Trixis radialis Ktze. Field Col. 

 Merida in scrubby old Henequen 



Mus. Bot. 1:54); common near 

 plantations, Feb. n, 1903, Ccec. 

 et Ed. Seler 3838; Valdez 10 (Trixis radiale Lag. Ibid. 1:326); shrub 

 15 feet high, common in open lands near Izamal, Jan. Gaumer 397 

 (Trixis radiale Ktze. Ibid. 1:326), Calotmul 1738, 234.0, San Anselmo 



1739- 



Maya name TOKABAL, "Astringent." Commonly used in the 



