Dec. 1896. Flora of Yucatan — Millspai ch. 325 



volucre solitary, cylindrical, axillary, short pedicelled, the 5 

 scales linear, obtuse, strongly keeled ; florets, 12 : ray-florets, 

 5 ; ray ovate, emarginate, style bifid, scales of pappus, 2 ; mem- 

 braneous, lanceolate, awned, equaling the tube. Disk florets 

 crenately 5-toothed, pappus 5-awned, awns lanceolate-linear 

 aristate, stigma, clarate. Achemia 4-angled, pilose with scat- 

 tered lax hairs. 



Herb 6 inches high, branching diffusely from the rootstalk : 

 leaves, 6 lin. long, i lin. broad : involucre 2 lin. long, scales .75 

 lin. broad. 



Along roadsides near Izamal, July to Aug. (778). 



Pectis punctata J acq. 



Herb 3 feet high, common along the Chique road near Izamal. 

 Sept. (887). 



Pluchea odorata (L.) Cass. Santa Ma/ia. Chalche. 



Shrubby, 15 feet high, widel}' cultivated at Izamal, Jan to 

 Dec. (399). Common near Merida { J^ildez, j6). 



Porophyllum nummularium DC. 



Shrubb}', 15 feet high, common in the brushlands about Iz- 

 amal (523). 



Sanvitalia procumbens Lam. San^uinaria de flares )u\oros. 



Abundant in waste places about Merida {Valdez, 6j). 



Senecio salignis DC. 



Old fields about Tikul. April 1887 [Millspaiigh, 28). ' 



Sonchus oleraceus Linn. Achicoria. Lechuga silvcstrc. 



Herb 4 feet high, frequent on cultivated grounds about Izamal. 

 July to March (310). Frequent about Merida {Va^dcz, 8r). 



Stephanomeria runcinata Nutt. 



Herb 3 feet high, common in old corn fields at Silam, April 

 (877)- 



Tagetes patula Linn. Xpuhuc. 



Herb 3 to 6 feet high, very abundant in old fields about Iz- 

 amal, Oct. to Nov. (476). 



Tithonia diversifolia (Hemsl.) A. Gray. Chiopl,'. 



\\'ild and cultivated near Izamal {Valdez, <pj). 



Tithonia tubaeformis Cass. 



Herb 18 inches high, common on open grounds near Izamal, 

 July to March (489, 518.) 



Tridax procumbens Linn. Verba San Juan, del Monte. 



Herb 20 inches, very common in waste places near Izamal, 

 Jan. to Dec. (341). Ci)mmon near Merida {Valde?:, 8g). 



Tridax procumbens canescens DC. 



Herli 18 Indies, abundant in open places near Izamal, Jan. 

 to Dec. (400). 



