320 RypBerG: Rocky MounTAIN FLORA 
Nelson’s clear and discriminating revision of a large part of the 
genus.’ While Elias Nelson’s treatment is in the main excellent, 
the writer is inclined to take some exceptions to this as well as to 
that of the New Manual. In the latter we find the following 
key of the A. alpina group: 
Stems very slender, 2—7 cm. high. 1. A. media. 
Stems medium, 8-15 cm. high. 
Leaves broadly spatulate; involucres 6-7 mm. high. 2. A. fusca. 
Leaves Feiiciaes ula eolate; involucres about 5 mm. high. 
Leaves obtuse, tomentose. 3. A. reflexa. 
Leaves acute, canescent. 4. A. umbrinella. 
The only species that can be separated out by this key is 
Antennaria fusca. The key is not workable otherwise. A. media 
is often 8-10 cm. high ahd A. wmbrinella and A. reflexa are often 
less than 7 cm. high. In both A. reflexa and A. umbrinella as 
limited in the New Manual and in E. Nelson’s paper are the leaves 
both tomentose and canescent, as the one word indicates the kind 
of pubescence, and the other word the color of the same. E. 
Nelson merges A. mucronata E, Nels. in A. umbrinella Rydb. and 
A. flavescens Rydb. in A. reflexa E. Nels. Under the latter he 
makes the following statement: “‘In describing A. wmbrinella Dr. 
Rydberg confused two species . . . The male and female plants 
of his type are of different species. One of these he later named 
A. flavescens, and the staminate plants of this and his A. umbrinella 
are identical.’ It is true that there were a few staminate speci- 
mens of Antennaria flavescens mixed in the type collection of A. 
umbrinella, but there were also a few staminate specimens of the 
latter. I saw the plant in field, as I was present when Professor 
J. Flodman collected the type, but we did not then notice that 
another species was growing with it. The staminate plants of 
A. umbrinella, A. flavescens, and A. reflexa are very much alike 
and hard toseparate. A. flavescens has somewhat narrower bracts 
and the leaves are usually more or less yellowish and with a very 
fine and closely appressed silky tomentum. The difference be- 
tween the staminate plants of A. wmbrinella and A. reflexa I can 
not describe. The staminate plant of A. mucronata is very dif- 
ferent, more resembling that of A. media, but the inner bracts 
are nearly white, the outer very dark brown. E. Nelson states 
that typical staminate plants are unknown. The only ones I 
