
Macbride — Reclassified or new Spermatophytes 39 
heads and the broad leaves appear to be constant characteristics 
that serve rather definitely to distinguish the species from all the 
forms of the variable E. confertiflorum. The relationship of these 
two forms to each other, however, is not so clear; probably &. 
latilobum will prove to be merely a broad-leaved variety of B. 
tanacetifolium which, though, has denser pubescence and is mostly — 
more southern in its range. E. biternatum Rydb., EB. tridactylum — 
Rydb. and E. crucigerum Rydb., |. c. 96, are merely states of F. 
_ confertiflorum (DC.) Gray, var. trifidum (Nutt.) Gray (2. trifidum 
(Nutt.) Rydb.), and E. tenuifolium (DC.) Rydb., 1. ¢. 96 and E, 
cheiranthoides Rydb., 1. c. 95, are both to be referred to E. confer- 
tiflorum (DC.) Gray, var. laziflorum Gray. E. artemisiacfolium 
(Less.) Kuntze, Rev. Gen. i. 336 (1891), may be treated as a variety - 
of E. staechadifolium Lag. Gen. & Sp. Nov. 28 (1816). The typical — 
_ form of the latter has mostly entire leaves but it passes into the 
variety artemisiaefolium (Less.), comb. nov. (Bahia artemisiae- 
folia Less. Linnaea, v. 160 (1830)), characterized by more or less 
pinnatifid leaves. 



