PANICUM.—(1) Part of a spike of P. sanguinale; (2) one of its spikelets, magnified; (3) the same with its parts displayed, the three lower glumes empty.—(4) A spikelet of P. capillare, magnified; (5) the same displayed, the three lower glumes empty.—(6) A spikelet of P. clandestinum, magnified, (7) the same displayed, the lower flower represented by a glume and palet only.—(8) A spikelet of P. virgatum, magnified; (9) the same displayed, the lower flower staminate.
SETARIA.—(1) A magnified spikelet of S. glauca, with the accompanying cluster of bristles, (2) the spikelet displayed, showing the neutral lower flower, of a glume and palet only, and the perfect flower.
CENCHRUS.—(1) Involucre of C. tribuloides, in flower, enlarged; (2) longitudinal section of the same; (3) a spikelet displayed (the stigmas should belong to the right-hand flower; the left-hand or lower flower is only staminate).
TRIPSACUM.—(1) Piece of the spike (of the natural size), pistillate below, staminate above; (2) a longitudinal section of one of the pistillate spikelets; (3) a pistillate spikelet with its parts displayed; (4) a staminate (two-flowered) spikelet, with its parts displayed.
ERIANTHUS.—(1) Part of the hairy inflorescence with two spikelets of E. saccharoides, enlarged; (2) one of the spikelets displayed.
ANDROPOGON.—(1) Small portion of the spike of A. furcatus, enlarged, with one fertile and awned spikelet, and one staminate and awnless spikelet; (2) the fertile spikelet, and (3) the staminate spikelet, displayed.
CHRYSOPOGON.—(1) A fertile spikelet of C. nutans, enlarged, with a sterile pedicel on each side; (2) the spikelet displayed.