FuiRENA. 



CYPERACE.E. 



345 



Tribe II. FUIRENEjE. Nees. 



Spikelets perfect. Scales imbricated on all sides, aristate-mucronate. Perigyniurn of 3 

 sessile or unguiculate scales, which are inserted at the angles of the achenium, and 

 sometimes also of three bristles alternating with the scales. Stamens three, opposite the 

 perigynium-scales. Style S-cleft. Caryopsis triangular. — Spikelets capitate ; the heads 

 aggregated or umbellate, axillary and terminal. 



3. FUIRENA. Rottb.; Endl. gen. 995 ; Nees, Cyp. in Endl. $ Mart. ft. Bras. p. 107. 



FUIRENA. 



[In honor of G. Fuiren, a Danish botanist.] 



Character that of the tribe. 



1. Fuirena squarrosa, Michx. Squarrose Fuirena. 



Culm obtusely triangular, sulcate ; leaves ciliate ; sheaths hairy ; spikes clustered (3-6 

 - 12), ovoid ; awn as long as the scale ; bristles none ; perigynium-scales cordate or ovate, 

 unguiculate. — Michx. fl. 1. p. 37 (in part) ; Torr. Cyp. p. 290 ; Kunth, enum. 2. p. 184. 



var. 1 : achenium about twice the length of its stipe ; perigynium-scales ovate, rounded 

 at the base, cuspidate and tipped with a short awn, the claw shorter than the retrorsely 

 scabrous bristle ; leaves and sheaths hairy. — Torr. 1. c. F. squarrosa, Torr. ft. 1. p. 67 ; 

 Beck, bot. p. 129. 



var. 2 {pumila) : achenium somewhat obovoid, gradually attenuated at the base into a stipe ; 

 perigynium-scales ovate-lanceolate, narrowed at the base, obscurely 3-nerved, tapering at the 

 summit into a long cusp or short awn ; bristles longer than the nut, retrorsely scabrous ; 

 spikes 2-6, mostly terminal, sessile ; leaves smoothish. — Torr. fl. I. p. 68, and Cyp. I. c. 

 F. pumila, Spreng. syst. 1. p. 237 ; Schult. mant. 3. p. 546. F. Torreyana, Beck, bot. 

 p. 429. 



Culm in var. 1 a foot or 18 inches high ; the spikes 6-12 in an irregular terminal umbel 

 or cluster, with occasionally several lateral ones : in var. 2, 3 - 6 inches high. Spikes 4-6 

 lines long ; the scales hairy, tipped with a slender recurved bristle which is nearly the length 

 of the lamina. 



Sandy swamps and bogs. Both varieties occur on Long Island. Fl. August. Fr. Sep- 

 tember. 



[Flora — Vol. 2.] 



44 



