698 EXPLANATION OF THE PLATES. 



Eriophorum; a small portion of the inflorescence (6); a flower (7); a spike in 

 fruit (8); achenium from the same, with the tortuous bristles much length- 

 ened (9); section of the achenium (10). 



ERIOPHORUM. Small plant of E. alpinum, in flower (1); spike (2); a scale (3), 

 and (4) a flower from the same; the spike in fruit, the bristles forming a 

 cottony tuft (5); achenium and its bristles (6). 



FIMBRISTYLIS. Summit of a small flowering stem of F. laxa (1); a spike of 

 the same (2); a detached scale (3), and (4) a flower of the same; achenium 

 (5). F. (Trichelostylis)autumnalis; a spike, enlarged (6); flower (7); acheni- 

 um (8), and (9) section of the same. 



TAB. IV. 



DICHROMENA. Head and involucre of D. latifolia (1); a scale from one of the 



spikes (2), and the same cut across (3); a flower (4); achenium with its 



tubercle (5). 

 RHYNCHOSPORA. Upper part of flowering stem of R. Torreyana (1); a spike 



(2); detached flower (3); achenium (4) with short bristles at its base; one 



of these bristles more magnified (5). 

 R. ( PSILOCARYA): Part of plant (1), enlarged spike (2), detached scale (3), 



flower (4), and achenium with its beak (5) of R. (Psilocarya) scirpoides. 

 R. ( CERATOSCH(ENUS): Upper part of fruiting plant (1), detached spike (2), 



flower (3), and beaked achenium with its bristles (4) of R. ( Ceratoschcenus) 



macrostachya. 



TAB. Y. 



CLADIUM. Summit of a plant of C. mariscoides (1); detached spike (2); same, 

 open, showing a staminate and a perfect flower (3); the nut-like achenium 

 (4), and the longitudinal section of the same (5). 



SCLERIA. Summit of a flowering stem of S. reticularis (6); three spikelets from 

 a cluster, the middle one pistillate, the lateral ones staminate (7); staminate 

 spikelet displaying four male flowers, the filaments of two of them have lost 

 their anthers (*8); pistillate spikelet displaying a single pistillate flower (9); 

 achenium with the 3-lobed double cup underneath (10). 



CAREX. Plant of C. pauci flora (11); a staminate flower with its scale (12); scale 

 (13), and mature pistillate flower, in its perigynium (14); cross section of 

 perigynium and of the contained achenium (15); achenium on its stalk, style 

 and stigmas (16). C. Steudelii, upper part of flowering plant (17); the spike 

 enlarged (18); a staminate flower and its scale (19); pistillate flower in its 

 perigynium (20); the same with half the perigynium cut away to show the 

 contained achenium and style (21). 



TAB. VI. 



CAREX. C. trisperma, upper part of a stem in fruit (1) ; enlarged spike displayed, 

 with three staminate and two pistillate flowers (2) ; a scale (3) and a ripe peri- 

 gynium (4), of the latter; with a section of the perigynium near the base, and 

 of the contained perigynium (5). C. straminea, summit of a fruiting plant (6) ; 

 a spike enlarged (7); scale of a pistillate flower (8) ; the winged perigynium 

 and the contained achenium cut across (9); detached achenium with persist- 

 ent style and stigmas (10). C. umbellata, whole plant (11); a perigynium 

 and its scale (12); cross-section towards the base^ of perigynium and its 

 contained achenium (13); detached achenium with" its persistent style and 

 stigmas (14). C. bullata; upper part of plant in fruit, with one pistillate and 

 two staminate spikes (15); one of its staminate flowers with the scale (16); a 

 pistillate scale (17) and mature perigynium (18) ; longitudinal section of 

 the latter, showing the achenium and its style (19), and cross section of 

 the same (20). 



