SETARIA ITALICA AND ITS IMMEDIATE ALLIES l8l 
nomen. Setaria purpurascens Opiz, Boehm. Gew. 12 (1823) fide 
Aschers. & Graebn. Syn. Mitteleur. Fl. ? Panicum viride var. 
brevisetum Doell,^ Rhein. Fl. 128 (1843): Doell, Fl. Grossherz. Bad. i: 
234 (1857): Aschers. Fl. Prev. Brandenb. i: 809 (1864). Setaria 
arvensis subsp. viridis var. purpurascens Bruhin, in Bericht. Naturw. 
Ges. St. Gallen 1865-66: 216 (1866) nomen fide Dalla Torre & Sarnth. 
Fl. Tirol. ? S. viridis h arenosa Schur, Enum. PI. Transs. 723 (1866) ; 
ed. nov., 723 (1885). S. viridis a laevigata Schur, 1. c. 723 (1866); ed. 
nov., 723 (1885). S. viridis var. fuscata Harz. Landw. Samenk. 2: 
1260 (1885) fide Beck, Fl. Nieder-Oesterr. ? Chamaeraphis italica 
var. viridis forma purpurascens Ktze. Rev. Gen. PL 2: 767 (1891). 
Panicum viride var. minor Koch, ex Lehm. in Arch. Naturk. Livl., ser. 
2, II : 137 [Fl. Poln.-Livl. 137] (1895) [Koch did not make the combina- 
tion]. ? P. viride [subsp.] A. P. eu-viride A. II. brevisetum (Doell) 
Aschers. & Graebn. Syn. Mitteleur. Fl. 2^: 77 (1899). P. viride 
[subsp.] A. P. eu-viride B. Weinmannii (R. & S.) Aschers. & Graebn. 
1. c. 2^: 77 (1899). ^ ^- '^'^^id^ [subsp.] A. P. eu-viride B. II. arenosum 
(Schur) Aschers. & Graebn. 1. c. 2^: 77 (1899). P. viride var. Wein- 
mannii (R. & S.) Dalla Torre & Sarnth. Fl. Tirol. 6^: 157 (1906). 
P. Weinmanni "R. & S." according to Dalla Torre & Sarnth. 1. c. 6^: 
157 (1906) in syn. [R. & S. placed the species under Setaria]. Setaria 
viridis var. breviseta (Doell) Hitchc. in Rhodora 8: 210 (1906) : Hitchc. 
in Gray Man., ed. 7, 119 (1908) [as to plants, possibly not as to name]. 
Distinguishable from the common form of S. viridis chiefly in its 
spreading habit [base usually geniculate], its narrower leaves, 2 to 6 
mm. v/ide and its smaller more slender panicles 0.7 to 5 cm. long, 3 to 
6 mm. broad. The culms are frequently purplish toward the base. 
The spikelets are commonly smaller than those of the species 2 to 2.3 
mm. long with exceptions only 1.6 mm. and up to 2.4 mm. The setae 
are either purple or green and vary in length from about the length of 
the spikelet to about 6 mm. long. 
The length of the setae is so variable (when longest only about 6 
mm.) that it seems undesirable to separate var. breviseta (Doell) 
Hitchc. as the plants so named agree in every other respect except 
length of setae. Whether Doell's Panicum viride /3 brevisetum is the 
same I am not so certain as the only point brought out by Doell is the 
length of the setae which might equally well apply to the species proper. 
4 I can find no evidence to prove conclusively whether this is a short-setaed 
variation of the species proper or of var. Weinmanni; usage places it with the latter. 
