ROBINSON. — STUDIES IN THE EUPATORIEAE. 45 



In range it extends from Iowa to British Columbia and southward in 

 the Rocky Mountains to New Mexico. 



Eupatorium rapunculoides, n. comb. Stevia rapunculoides DC. 

 Prod. V. 124 (1836). Eupatorium dasvcarpum Gray, Proc. Am. Acad, 

 xxii. 420 (1887); Robinson, ibid, xxxvi. 478 (1901). 



Eupatorium remotifolium DC. Prod. v. 165 (18.36). This species 

 is reduced without comment by Baker in Mart. Fl. Bras. vi. pt. 2, 205 

 (1876) to E. Vitalbae DC, but the two species in question have not 

 the smallest resemblance. It can only be inferred that Mr. Baker was 

 misled through some transposition of labels or similar slip. The plants 

 are by no means similar in habit, leaf texture, inflorescence, or in- 

 volucre. The marked difference in the size of the heads is quite suffi- 

 cient to show them distinct species. In E. Vitalbae the florets, 

 including the mature achene, are 10-12 mm. long, while in E. remoti- 

 folium they are, when measured in the same manner, only 4-5 mm. 

 long. 



Eupatorium resinosum Poepp. [& Endl.] Nov. Gen. et Spec. iii. 54 

 (1845), not Torr. From an examination of the type-specimen of this 

 obscure species, which is to be found in the herbarium of the Imperial 

 Natural History Museum at Vienna, it is clear that it is identical with 

 E. LAEVIGATUM Lam. Diet. ii. 408 (1786). 



Eupatorium rubricaule HBK. Nov. Gen. et Spec. iv. 124 (1820). 

 Although excellently described by Kunth, this species appears never 

 to have been recognized. Hemsley (Biol. Cent. -Am. Bot. ii. 100) refers 

 no material to it beyond the original specimen collected by Humboldt 

 & Bonpland, and no more recent collection of it seems to be on record. 

 The type was found, however, to be exactly the plant for some years 

 known as E. amplifoUum Gray, Proc. Am. Acad. xv. 28 (1880), and 

 well shown by the following exsiccatae : Parry & Palmer's no. 334 

 from San Luis Potosi, Pringle's no. 4272 from cool canons near 

 Pazcuaro, Michoacan, Palmer's no. 165 (coll. of 1902) fi'om Alvarez, 

 San Luis Potosi, and L. C. Smith's no. 858 from the mountains of 

 Jayacatlan, alt. 2150 m., Oaxaca. Dr. Gray's later specific name 

 must, of course, drop into synonymy. Why E. rubricaule HBK., 

 which is a large-leaved perennial, should have been referred to E. 

 guadalupense Spreng. by the Index Kewensis is not clear. 



Eupatorium sagittatum Gray, PI. Wright, i. 88 (1852). This 

 species has in general ovate-oblong sagittate or hastate leaves con- 

 siderably longer than broad. In its wide deltoid leaves the following 

 plant is strikingly different, although maintaining the essential charac- 

 teristics of the species. 



Var. deltophyilum, n. var., fruticosum oppositirameum habitu 



