CAREX.—(1) C. trisperma, upper part of a stem in fruit; (2) enlarged spike displayed, with three staminate and two pistillate flowers; (3) a scale, and (4) a ripe perigynium, of the latter; with (5) a section of the perigynium near the base, and of the contained achene.—(6) C. straminea, var. brevior, summit of a fruiting plant; (7) a spike enlarged; (8) scale of a pistillate flower; (9) the winged perigynium and the contained achene cut across; (10) detached achene with persistent style and stigmas.—(11) C. umbellata, whole plant; (12) a perigynium and its scale; (13) cross-section toward the base of perigynium and its contained achene; (14) detached achene with its persistent style and stigmas.—C. bullata; (15) upper part of plant in fruit, with one pistillate and two staminate spikes; (16) one of its staminate flowers with the scale; (17) a pistillate scale, and (18) mature perigynium; (19) longitudinal section of the latter, showing the achene and its style, and (20) cross-section of the same.
LEERSIA.—(1) Panicle of L. oryzoides, reduced in size; (2) a branchlet of the same, with its spikelets, of the natural size; and (3) an open spikelet in flower, enlarged.
ZIZANIA.—(1) A staminate, and (2) a pistillate flower or spikelet of Z. aquatica; (3) a magnified pistil with a pair of squamulæ or hypogynous scales; (4) a grain, and a magnified longitudinal section of the lower part of the same, showing the embryo at the outside of the base of the albumen.
ALOPECURUS.—(1) Part of a plant of A. geniculatus, in flower; (2) a few spikelets from the spike-like inflorescence, moderately magnified; (3) an open spikelet in flower, more magnified, and (4) the single flowering glume detached.
PHLEUM.—A detached spikelet of P. pratense, having the flower with its glume and palet raised above the empty glumes, magnified.
HELEOCHLOA.—(1) Inflorescence of H. schœnoides; (2) a separate enlarged spikelet; and (3) the same open, in flower.
SPOROBOLUS.—(1) A spikelet of S. cryptandrus, magnified; (2) the same, with the flower open, raised above the empty glumes; and (3) the fruit, more magnified, showing the seed loose in the pericarp (utricle).—(4) An enlarged spikelet of E. vaginæflora; and (5) the same displayed.