172 Rhodora [August 
of P. pilosum Sw. and consequently it would be inadvisable to consider 
it as rendering P. heterophyllum Bose invalid. P. heterophyllum 
Muhl. in Trans. Am. Phil. Soc. 3 : 160 (1793) is a nomen nudum and 
is referred to under P. microcarpon Muhl. by Hitchcock & Chase l. c. 
181 (1910). P. heterophyllum Sw. Adnot. Bot. 6 (1829) equals P. 
sphaerocarpon Ell. [cf. Hitche. & Chase l. c. 251 (1910)]. Conse- 
quently, according to the “Vienna Code," P. heterophyllum Bosc is 
the valid name for what has been known as P. columbianum Scribn. 
PANICUM HETEROPHYLLUM Bosc in Nees Agrost. Bras 227 (1829), 
not Spreng. l. c. (1822), nor Muhl. 1. c. (1793), nor Sw. 1. c. (1829). 
Synonymy in part: P. columbianum Scribn. U. S. Div. Agrost. Bull. 
7 : 78, fig. 60 (1898); Hitchc. in Gray Man. ed. 7, 112 (1908); Hitchc. 
& Chase Contr. Nat. Herb. 15 : 247 (1910). 
PANICUM COLUMBIANUM Scribn. Var. THINIUM Hitch. & Chase 
Since the specific name has been altered it is necessary to mention 
the new varietal combination. 
P. HETEROPHYLLUM Bosc Var. thinium (Hitchc. & Chase) comb. 
nov. P. unciphyllum Trin. Var. thinium Hitche. & Chase, Ruopora 8 : 
209 (1906). P. columbianum Scribn. Var. thinium Hitche. & Chase 
in Robinson, Rnopona 10 : 64 (1908); Hitche. in Gray Man. ed. 7, 112 
(1908); Hitche. & Chase Contr. Nat. Herb. 15 : 248 (1910). 
PANICUM POLYANTHES Schultes. 
The oldest name for this species is P. multiflorum Ell. Sk. Bot. 
S. C. & Ga. 1:122 (1816) [cf. Hitche. & Chase Contr. Nat. Herb. 
15 :254 (1910) in syn. under P. polyanthes Schultes]. According to 
the American Code P. multiflorum Poir. in Lam. Dict. Suppl. 4 : 282 
(1816) renders the use of multiflorum as the specific name invalid, 
but by Sect. 7, Art. 50 of the “Vienna Code" P. multiflorum Poir. 
which equals P. dichotomiflorum Michx. Fl. Bor. Am. 1:48 (1803) 
[cf. Hitche. & Chase l. c. 48 (1910)] does not invalidate P. multiflorum 
Ell. Consequently the valid name of the species now known as P. 
polyanthes Schultes is P. multiflorum Ell. 
PANICUM MULTIFLORUM Ell. Sk. Bot. S. C. & Ga. 1:122 (1816) 
not Poir. l. c. (1816). Synonymy in part: P. polyanthes Schultes 
Mant. 2 : 257 (1824); Hitche. in Gray Man. ed. 7, 113 (1908); Hitche. 
& Chase Contr. Nat. Herb. 15 : 254 (1910). 
For complete synonymy cf. Hitchc. & Chase l. c. 
