FERNALD. — CARICES OP SECTION HYPARRHENAE. 513 



EXPLANATION OF PLATES. 1 

 Plate I. 



Carex muskingumensis : Fig. 1, spike; Fig. 2, perigynium. 



C. sc.oparia: Fig. 3, spike; Fig. 4, perigynium. 



C. scoparia, var. condensa : Fig. 5, spike. 



C. tribuloides : Fig. 6, spike ; Fig. 7, perigynium. 



C. tribuloides, var. reducta : ¥\g. 8, spike. 



C. siccata : Figs. 9, 10, spikes ; Fig. 11, perigynium. 



C. Craivfordii : Fig. 12, spike ; Fig. 13, perigynium. 



C. Crawfordii, var. vigens: Fig. 14, spike. 



C. oronensis : Fig. 15, spike ; Fig. 16, perigynium. 



C. praticola : Fig. 17, spike; Fig. 18, perigynium. 



C. cristata : Fig. 19, spike ; Figs. 20, 21, perigynia. 



C. albolutescens : Figs. 22, 23, spikes; Fig. 24, perigynium. 



Plate II. 



C. mirabilis : Fig. 25, spike ; Fig. 26, perigynium. 



C. mirabilis, var. perlonga : Fig. 27, spike. 



C. straminea : Fig. 28, spike ; Fig. 29, perigynium. 



C. straminea, var. echinodes : Fig. 30, spike. 



C. tenera: Fig. 31, spike ; Fig. 32, perigynium. 



C. tenera, var. Richii : Fig. 33, terminal spikelet ; Fig. 34, perigynium. 



C. tenera, var. invisa : Figs. 35, 36, spikes. 



C. Bicknel/ii : Figs. 37, 38, spikes ; Figs. 39, 40, perigynia. 



C. slllcca: Fig. 41, spike; Fig. 42, perigynium. 



C. alata : Fig. 43, spike ; Fig. 44, perigynium. 



C. alata, \&v.ferruginea : Fig. 45, spike ; Fig. 46, perigynium. 



Plate III. 



C.festucacea : Fig. 47, spike ; Fig. 48, perigynium. 



C.festucacea, var. brevior : Figs. 49, 50, spikes ; Fig. 51, perigynium. 



C. Bebbii : Fig. 52, spike ; Fig. 53, perigynium. 



C.focnea : Fig. 54, spike ; Fig. 55, perigynium. 



C.foenea, var. pcrplexa : Fig. 56, spike ; Fig. 57, perigynium. 



1 The plates illustrating this synopsis were prepared by Mr. F. Schuyler 

 Mathews from characteristic specimens. The figures of the spikes represent 

 life-sized individuals, while those showing the inner faces of the perigynia are 

 four times as large as in nature, 

 vor,. xxxvu. — 33 



