46 PROCEEDINGS OF THE AMERICAN ACADEMY. 



capitulis involucri scjuamis formae tj^icae simile ; foliis multo latiori- 

 bus deltoideis 3-4 cm. longis 2-4.4 ! cm. latis apice et angulis 

 inferioribus transverse divaricatis acutis. — Near Culiacan, Sinaloa, 

 Mexico, coll. Schajfner (type, in hb. Gray). 



EuPATORiUxM THYRSOiDEUM Moc. ex DC. Prod. V. 150 (1836). Some 

 years ago the writer (Proc. Am. Acad, xxxvi. 484) stated the belief 

 that this plant was identical with E. quadrangulare DC. 1. c. How- 

 ever, subsequent study of more copious material and a re-examination 

 of the tj'pe specimens in the Prodromus Herbarium at Geneva have 

 shown conclusively that the two species are wholly distinct notwith- 

 standing considerable habital resemblance. To E. thiirsoideum, which 

 may be recognized by its roundish stem, more glomerate-thyrsoid 

 inflorescence, and softer less stramineous involucral scales, the follow- 

 ing specimens may be referred : Dr. Palmer's no. 1048 (coll. of 1890) 

 from Manzanillo, and his no. 1162 (coll. of 1891) from Colima, W. G. 

 Wright's no. 1355 from San Bias, Langlass^'s no. 650, collected on 

 granitic soil at Cajinicuilar, alt. 300 m., in Michoacan or Guerrero, 

 Baker's no. 2302, Volcan El Viejo, Dept. Chinandega, Nicaragua, and 

 Barclay's no. 2719 from Tiger Island, Gulf of Fonseca. 



Eupatorhim tolimense Hieron. in Engl. Bot. Jahrb. xix. 45- (1894), 

 The writer, after examining the type of this species at the Boyal 

 Botanical Museum at Berlin and the type of E. pellucidum HBK. 

 Nov. Gen. et Spec. iv. 108 (1820), which is preserved in the herbarium 

 of the Museum of Natural History at Paris, is unable to find any 

 differences of importance between them. 



EuPATORiuM urticaefolium Reichard, Syst. iii. 719 (1780). Agera- 

 tum altissimum L. Spec. PI. ii. 839 (1753). Eiipatorium altissimum 

 Murr. Syst. Veg. ed. 13, 614 (1774), not L., nor Murr. 1. c. 613. E. 

 ageratoides L. f Suppl. 355 (1781). Kyrstenia altissima Greene, 

 Leafl. i. 8 (1903). A consistent application of the rules of priority 

 necessitates the reviving of Reichard's name for our common and attrac- 

 tive N orth American Ewpatorium which has long passed as E. agera- 

 toides. Furthermore, in consequence of this revival of Reichard's 

 E. urticaefolium, it is necessary to suppress the later E. urticaefolium 

 L. f. Suppl. 354 (1781). This, however, is no great misfortune, for 

 the species of Linnaeus filius has been in recent times entirely mis- 

 interpreted, the name having been applied by English and German 

 botanists to a coarse annual, widely distributed in tropical America, 

 having rather long pedicels and ovate-lanceolate to lance-linear leaves. 

 This plant has borne many names, of which the earliest appears to be 

 the hitherto obscure E. pauci forum HBK. Nov. Gen. et Spec. iv. 120 

 (1820). Very di-fiferent from this is the type of ^. urticaefolium L. f, 



