18  RypBerG: STUDIES ON THE Rocky MOUNTAIN FLORA 
given as a synonym. The latter plant is a decidedly pubescent 
plant and should be associated rather with A. villosa, but is taller 
and its flowers turn deep purple in age. 
Under the variety pumilum we find Agoseris Leontodon 
Rydb. asa synonym. The latter was based on Macrorhynchus 
glaucus laciniatus D.C. Eaton. Dr. Gray included in his Troxi- 
mon glaucum laciniatum a multitude of forms, in fact everything 
of the A. glauca group with laciniate leaves. Macrorhynchus 
glaucus laciniatus D. C. Eaton is not found east of Nevada. 
It is related to Stylopappus laciniatus Nutt. 
Under Troximon arachnoideum (Rydb.) A. Nels. are found the 
following: ‘T. glaucum laciniatum in part (not T. laciniatum 
Gray . - Agoseris laciniata Greene; A. arachnoidea Rydb. 
Te “The plant described by Professor Nelson is the same as 
Siylbbcbous laciniatus Nutt. A duplicate of Nuttall’s type is in 
the old Torrey herbarium, and it is to be known as Agoseris 
laciniata (Nutt.) Greene. If Troximon is used the name should 
be T. laciniatum (Nutt.) A. Gray, although Dr. Gray described 
under that name an entirely different plant from Nuttall’s Stylo- 
pappus laciniatus. The type of the latter did not have developed 
fruit and both Nuttall and Gray thought that it was related to 
Stylopappus grandiflorus Nuttall, or Troximon grandiflorum A. 
Gray. Its achenes are of the A. glauca type with short striate 
beak. (See further below.) To use the name Troximon arachnot- 
deum for this plant was entirely out of place, for Agoseris arach- 
noidea Rydberg is an entirely different plant of the A. aurantiaca 
group, with long filiform, non-striate achene-beak, in age purple 
flowers, and with densely pubescent leaves. Evidently Professor 
Nelson did not know the plant. 
Under Troximon purpureum we find the following synonyms: 
‘* Macrorhynchus purpureus A. Gray . ; T. gracilens A. Gray 
: A. Greenei Rydb. as to our range.” In the herbarium of 
Cottnmbte University there is a duplicate of the type of Macro- 
rhynchus purpureus A.Gray. It is a low plant scarcely more than 
1 dm. high, with narrow, pinnatifid, glaucous and glabrous leaves 
and brightly spotted involucral bracts. Professor Nelson char- 
acterizes his Tvoximon purpureum as being tall, 2-5 dm. high, 
with leaves tapering into long, slender, winged petioles. Evi- 
