522 
MONOECIA TRIANDRIA. 
Grows in ditches and in stagnant waters — along the roads in Chatham 
County, Georgia, not uncommon. 
Flowers May—June. 
TRIPS ACUM. Gen. Pe. 1134. 
Masc . — Calyx gl li- 
ma 2-flora, exteriore 
masculo, interiore neu- 
tro. Corolla, gluma 
membranacea. 
Foem. — Calyx, glu- 
ma 2-flora, valva ex- 
teriore involucrum si- 
mulante, sinubus perfo- 
rata. Corolla, gluma 
2 valvis. Styli 2. 
Semen 1. 
Male Florets — Glume 
2-flowered, the exterior 
sterile, the interior 
neuter. Glume of the 
corolla membranace- 
ous. 
Female — Calyx a 
glume 2-flowered, ex- 
terior valve resembling 
an involucrum perfo- 
rate near the base. 
Corolla, glume 2-valv- 
ed. Styles 2. Seed 1. 
1. Dactyloides. 
T. spicis plurimis, (3 
— 4) aggregatis, super- 
ne masculis, inferne 
foemineis. 
Spikes numerous, (3 
—4) aggregate; florets 
sterile near the summit, 
fertile at the base. 
Sp. pi. 4. p* 201. Mich. 1. p. 60. Pursh, 1. p. 88. Nutt. 1. p. 85. 
Root perennial. Stem four to five feet high, glabrous, sometimes com- 
pressed and flattened on one edge. Leaves large, sometimes three feet long, 
one and a half inches wide, acutely serrulate, channelled, scabrous on the 
upper surface with a few hairs along the midrib, glabrous underneath, con- 
tracted and villous at the throat. Floivers in terminal spikes; spikes three 
to four, (when four brachiately opposite?) bearing flowers on one (the inte- 
rior) side. F ertile florets two to four, at the base of the spike, sitting in the 
excavations of the jointed, scabrous, somewhat triquetrous and flexuous ra- 
chis. Sterile florets in two-flowered clusters, two clusters in each cavity in the 
rachis arranged alternately on each margin, but the articulations approach 
so near that the flowers appear imbricate. Of the sterile flowers the glume 
is two valved, the exterior oval, obtuse, somewhat scabrous, cartilaginous, 
