APRIL, 1904. PLANTS YUCATAN^ MILLSPAUGH & CHASE. 



39 



Hab. Common, 4 feet high, in waste places about Merida, Valdez 

 49; Chichankanab Gaumer 1349. 



The name MANZANILLA is applied by the Yucatecs to many 

 globular headed composite, especially to this and other Heleniums, 

 Matricarias, and Anthemi. The flowers of H. quadridentatum are 

 strongly irritant to the pituitary membrane, and are used as a sternu- 

 tatory. An infusion of the leaves is used as a remedy for stomachic 

 colic; and the seeds, heated for a considerable time in olive oil, are 

 employed as an application to the abdomen of children in abdominal 

 colic. 



TAGETES L. Sp. PL, 887. 



Heads heterogamous, radiate, ray flowers pistillate, fertile, ligu- 

 late; disk flowers perfect, fertile, tubular. Involucre cylindrical, of 

 herbaceous equal bracts in i series, connate nearly to the summit. 

 Receptacle small, naked, alveolate or fimbrilose. Achene dorsally 

 compressed, linear; pappus of 3-6 firm, unequal scales, one or more 

 usually produced into subulate awns. Strong-scented herbs commonly 

 with large showy flowers. 



Tagetes patula L. Sp. PL, 1249. 



An erect, branching glabrous herb with angled stem and branches 

 and alternate, sessile, pinnately divided leaves, the divisions lanceolate 

 or linear-lanceolate, bearing copious oil glands, sharply serrate, the 

 serratures of the upper leaflets produced into slender bristles. Inflor- 

 escence of solitary, long-peduncled heads, terminal and axillary; 

 peduncles clavate and fistular at the summit. Heads 2.5-2.7 cm. 

 high, 3.5 cm. or more broad; ray flowers (normally) 5, disk flowers 

 about 50. Involucre ellipsoid-cylindrical of 5 connate acute bracts 



longitudinally marked with oil 

 glands. Ray corollas orange yel- 

 low, tube long and slender, ligule 

 orbicular-obcordate, 1.2-1.5 cm - 

 long, spreading; disk corollas cyl- 

 indrical, 5 lobed. Receptacle short- 

 conoid. Achene black, 1-1.2x9 

 mm.; narrowly oblanceolate; in 

 section unequally biconvex, each 

 surface concave in the center; 

 obscurely striate, hispidulous on 

 the margins; pappus of 5 connate, 

 maculate scales, the 3 ventral trun- 

 cate, short-fimbriate, 3-4 mm., the 

 dorsal pair prolonged into subulate, 

 hispidulous awns, 8-10 mm. long. 



Hab. On the Teocali of 

 Kabah, Nov. 26, 1865, Schott 708; Calcehtoh, March n, 1890, Stone 

 273 (in herb. Acad. Sci. Phila.); campo about Izamal, Jan. 23, 1895, 

 Millspaugh Armour Exped. 179 (Tagetes tenui folia Field Col. Mus. Bot. 

 1:54); "herb 3 to 6 feet high, very abundant in old fields about 



