514 PROCEEDINGS OF THE AMERICAN ACADEMY. 
C. leporina: Figs 58, 59, spikes ; Fig. 60, ee 
C. xerantica: Fig. 61, spike; Fig. 62, perigynium 
C. aenea: Figs. 68, 64, spikes ; Figs. 65, 66, perigynia. 
C. adusta : Wie g. 67, spike ; Figs. 68, 69, perigynia. 
C. sychnocephala : Fig. 70, spike; Fig. 71, perigynium. 
Puate LV. 
C. gynocrates : Figs. 72, 73, 74, 75, spikes ; Figs. 76, 77, perigynia. 
C. ezilis: Figs. 78, 79, 80, 81, 82, spikes; Fig. 83, perigynium. 
C. echinata: Figs. 84, 85, 86, 87, spikes; Fig. 88, perigynium. 
C. echinata, var. ormantha: Fig. 89, spike. 
hy 
C. echinata, var. cephalantha : Figs. 92, 93, spikes ; Fig. 94, perigynium. 
C. echinata, var. angustata ; Figs. 95, 96, spikes; Fig. 97, perigynium. 
C. sterilis: Figs. 98, 99, spikes; Fig. 100, perigynium. 
C. interior : Figs. 101, 102, 103, spikes ; Figs. 104, 105, perigynia. 
C. seorsa: Figs. 106, 107, spikes; Figs. 108, 109, perigynia. 
Puatre V. 
C. arcta. Figs. 110, 111, 112, spikes; Fig. 113, ohare 
C. canescens: Fig. 114, spike; Fig. 115, peri m. 
C. canescens, var. subloliacea: Fig. 116, spike ; Fig. 117, perigyniu 
C. canescens, var. disjuncta: Figs. 118, 119, spikes ; Fig. 120, Sie nicl: 
C. brunnescens : Figs. 121, 122, spikes; Fig. 128, 124, perigynia. 
C. elachycarpa : Fig. 133, spike ; Fig. 134, perigynium. 
C. norvegica: Fig. 135, spike ; Fig. 136, perigynium. 
C. glareosa: Fig. 137, spike; Fig. 138, perigynium. 
C. lagopina: Fig, 139, spike; Fig. 140, perigynium 
C. heleonastes: Fig. 141, spike; Fig. 142, sartgyitara. 
