14 Rhodora [JANUARY 
Panicum viRGATUM L., var. scorteum, n. var., perenne; culmis 
erectis robustis simplicibus paucis vel solitariis 7.7 dm. altis; rhizomat- 
ibus squamosis repentibus; laminis 4.1-4.5 dm. longis 1.1-1.2 em. 
6 
Figs. 3-6. Spikelets X 5. 3, type-form; 4, var. spissum; 5, var. cubense; 6, 
var. scorteum. 
latis levibus rigidis coriaceis; paniculis anguste cylindratis multifloris, 
rami inferioribus medios paullo superantibus; spiculis 3.5 mm. long- 
is; gluma superiore breviter mucronata;lemmatibus sterilibus apice 
rotundatis, gluma superiore brevioribus paleam superantibus. 
Culms erect, stout, solitary or few, 7.7 dm. tall: rootstock scaly, 
creeping: blades 4.1-4.5 dm. long, 1.1-1.2 em. broad, smooth, stiff, 
coriaceous: panicle narrowly ellipsoid, contracted, and many-flowered, 
the lower rays barely equalling the middle ones: spikelet 3.5 mm. long: 
first glume two-thirds the length of spikelet with middle nerve serrate 
towards the summit, shorter than the second glume and exceeding 
the palea. BERMUDA: rocks, shore of Flatt’s Inlet, Smith's Parish, 
July 8, 1905, A. H. Moore, no. 2,850 (type in Gray Herb.). 
Panicum vircatum L., var. thyrsiforme, n. var., perenne; culmis 
erectis simplicibus paucis vel solitariis 6.8-13.5 dm. altis; rhizomatibus 
squamosis repentibus; laminis 3.5-5 dm. longis 6-10 mm. latis, 
vaginis glabris; paniculis ellipsoideo-cylindratis 2.5-3 dm. longis 4-10 
cm. diametro, ramis tenuissimis multifloris inferioribus vix medios 
aequantibus. 
Culms slender, erect, simple, solitary or few, 6.8-13.5 dm. tall: 
rootstocks scaly, creeping: blades 3.5-5 dm. long, 6-10 mm. broad; 
sheaths glabrous: panicle ellipsoid-cylindrical, 2.5-3 dm. long, 4-10 
cm. in diameter; rays very slender and many-flowered, the lower rays 
barely equalling the middle ones. Fromma: swamp, Indian River 
region, Brevard County, November 28, 1902, A. Fredholm, no. 5,580 
(TYPE in Gray Herb.); swamp, Hillsboro County, August 28, 1904, 
A. Fredholm, no 6,365; Pine Key, Key West, Blodgett; Bay Head, 
August 30, 1898, Coombs, no. 646. MISSISSIPPI: Biloxi, September 7, 
1898, S. M. Tracy, no. 4,465. This last specimen is exceptionally large, 
