STANDLEY — ALLIONIACEAE OF MEXICO. 399 



Specimens examined: 



Coahuila: San Lorenzo de Laguna, 1880, Palmer 1119; Viesca, 1905, Purpus 

 1054; Mesillas near Saltillo, 1848, Gregg 535. 



3. Selinocarpus palmeri Hemsl. Biol. Centr. Amer. Bot. 3: 6. 1882. 



Type locality, "North Mexico, San Lorenzo de Laguna, Coahuila." Type col- 

 lected by Dr. Edward Palmer in 1880 (no. 1118). 



Only the type collection has been seen. 



12. WEDELIELLA Cockerell. 



Wedeliella Cockerell, Torreya 9: 167. 1909. 



Allionia L. Syst. ed. 10. 890. 1759, in part. 



Wedelia LoefL; Kuntze, Rev. Gen. PL 533. 1891, not Wedelia Jacq. 1760. 



Type species, Allionia incarnata L. 



KEY TO THE SPECIES. 



Involucre not viscid; perianth usually white (scarcely exceeding 

 the involucre); teeth of the anthocarp very slender, 5 or 6 in 



each row; annual 1. W. glabra. 



Involucre densely viscid; perianth purplish red; teeth of the antho- 

 carp stouter and broader, usually fewer; perennials. 

 Perianth 11 to 13 mm. long (more than twice as long as the 

 involucre); plant stout and densely viscid throughout; 



leaf blades densely pubescent on both surfaces 2a. W. incarnata 



villosa. 

 Perianth less than 10 mm. long; plants more slender and Iprh 



densely viscid ; leaf blades often glabrous 2. W. incarnata. 



1. Wedeliella glabra (Choisy) Cockerell, Torreya 9: 167. 1909. 

 Allionia incarnata glabra Choisy in DC. Prodr. 13 3 : 435. 1849. 

 Wedelia glabra Standley, Contr. Nat. Herb. 12: 332. 1909. 



Type locality, "Circa Mexicum." Type collected by Berlandier (no. 577). 



Specimens examined: 



Mexico: Type collection ; Chapultepec, September 21, 1869, Bilimek 167; Valley 



of Mexico, Guadalupe, June, 1865-6, Bourgeau 293; Guadalupe, July 18, 



1867, Bilimek 167a. 

 Aguascalientes: Near Aguascalientes, October 9, 1903, Rose 6c Painter 7733. 

 Zacatecas: Near San Juan Capistrano, August 19, 1897, Rose 2438 and 3539. 

 San Luis Potoki: San Luis Potosi, 1879, Schaffner 175, 562; Media Luna near 



Rio Verde, June, 1904, Palmer 73. 

 Oaxaca: De Matatlan a Tlacolula, alt. 1,600 meters, June, 1906, Conzatti 1468. 

 Puebla: Tlacuiloltepec, alt. 1,800 to 2,100 meters, August, 1909, Purpus 4008; 



Santa Lucia near San Luis Tultitlanapa, June, 1908, Purpus 3372; ? near 



Tehuacan, 1905, Rose, Painter & Rose 10165; Tehuacan, August 9, 1910, 



Hitchcock. 

 Tamaulipas: Vicinity of Victoria, 1907, Palmer 37ft. 

 Coahuila: Near Saltillo, 1848, Gregg 466, 484; Saltillo, July 10 to 14, 1910, 



Hitchcock. 

 Possibly more than a single species is represented by the specimens listed, but the 

 forms are very difficult of separation. 



2. Wedeliella incarnata (L.) Cockerell, Torreya 9: 167. 1909. 

 Allionia incarnata L. Syst. ed. 10. 890. 1759. 



Allionia nialamides Benth. Bot. Voy. Sulphur 44. 1844. 



Wedelia incarnata Kuntze, Rev. Gen. PI. 533. 1891. 



Type locality, "Juxta Cumana urbem, in silvis arenosis," Venezuela. 



