— 
tm —À 
1907] Lamson-Scribner,— Notes on Muhlenbergia 19 
equalling or slightly exceeding the florets and awns of the latter 
6-10 mm. long. An exact counterpart of this form, but awnless 
and placed under the species, was collected by C. R. Ball at 
Athens, Illinois, in 1892. The specimens from Pennsylvania 
(coll. by 'T. C. Porter, 1895), with rather loose subpyramidal 
panicles are exactly represented by awnless specimens collected 
in Illinois by J. Wolf in 1892. The latter are referred to the 
species. 
5. MUHLENBERGIA FoLIOSA Trin. Gram. Unifl. 190. 1824. Tri- 
chochloa foliosa Trin. Fund. Agros. 117. 1820. Agrostis foliosa 
R.& S. Syst. 2:373. 1817. Agrostis filiformis Willd. Enum. 
Hort. Berol. 1:95. 1809, not Sprengel 1807. Agrostis filiformis 
Muhl.! Gram. 66. 1817. A. lateriflora filiformis Torr. Fl. 1: 66. 
1824. Muhlenbergia mexicana filiformis Scribn. Mem. Torr. 
Bot. Club. 5:36. 1894. Muhlenbergia mexicana of authors in 
part. Culms branched above rarely to the base, branches elon- 
gated; panicles 5-15 cm. long, narrowly lanceolate to filiform, 
long-exserted, densely flowered, more or less interrupted espe- 
cially towards the base. 
The type of Muhlenberg's Agrostis filiformis is in his herbarium, 
deposited in the Academy of Natural Sciences of Philadelphia, and 
is the species here referred to Muhlenbergia foliosa Trin. assuming 
that it is identical with the Agrostis filiformis of Willdenow upon which 
M. foliosa was founded. Both Willdenow and Muhlenberg note the 
close affinity of this species with M. mexicana and Trinius in his later 
writings (Trans. St. Petersb. Acad. VI, 6°: 278. 1841) refers M. foliosa 
to that species. The habit of the plant and especially the fewer 
much exserted and more elongated panicles and more densely flowered 
panicle-branches serve to distinguish the species as here classified. 
Agrostis frondosa Poir. Encycl. Suppl. 1:252. 1810, was considered | 
by Roemer & Schultes as identical with Agrostis filiformis Willd. 
'The identity of Poiret's species is now doubtful; he says of it that it 
grows in Germany and resembles Agrostis mexicana Linn. in its in- 
florescence. 
Among the specimens in the National Herbarium referred to 
Muhlenbergia foliosa are the following: nos. 524, 526 and 529 M. 
L. Fernald, from Maine, no. 68 H. B. Dorner from Indiana; no. 
794 E. A. Mearns from]Minnesota; nos. 1686, 1756, 1764, 1704, and 
2848 P. A. Rydberg from Nebraska; no. 521 David Griffiths from 
PU 
