AGROSTIS.—(1) Panicle of A. alba, var. vulgaris, with (2) an enlarged open spikelet of the same; also (3) the rough pedicel and glumes of A. scabra, with the flower separated, the latter having no palet.
POLYPOGON.—(1) Spike-like contracted panicle of P. Monspeliensis; (2) an enlarged detached spikelet, showing the long awns to the empty glumes; (3) the same open in flower; and (4) a separate flower without the empty glumes.
CINNA.—(1) A magnified spikelet of C. arundinacea; and (2) the same open, displaying the flowering glume and palet, the single stamen, and the pistil.
MUHLENBERGIA.—(1) A magnified closed spikelet of M. sylvatica; (2) the same with the open flower raised out of the empty glumes.—(3) A magnified spikelet of M. diffusa; (4) its minute and unequal empty glumes more magnified; and (5) an open spikelet of the same.
BRACHYELYTRUM.—(1) A spikelet of B. aristatum enlarged; (2) the same displayed.
CALAMAGROSTIS.—(1) An open spikelet of C. Canadensis, enlarged, displaying all the parts; (2) the same with the flower raised out of the empty glumes, showing the hairy rudiment behind the palet.
ORYZOPSIS.—(1) An open magnified spikelet of O. asperifolia; and (2) the flower of the same removed from the empty glumes. Notice the remarkably long squamulæ or hypogynous scales, which here nearly equal the glume in length.