384 CYPERACE^. Carbx. 



D. Spikes several : terminal one androgynous ; the others fertile. Stigmas 3. 



32. Carex Buxbaumii, Wahl. Buxbaum's Sedge. 



Spikes about 4, obovate or oblong, rather remote ; terminal one androgynous, sterile below, 

 pedunculate , the others nearly sessile ; perigynium elliptical, compressed-triangular, obtuse, 

 minutely 2-toothed, about as long as the ovate cuspidate (brown) scale. — Wahl. in act. Holm. 

 1803. p. 163 ; Muhl. gram. p. 325 ; Ell. sk. 2. p. 539 ; Schwein. <^ Torr. Car. I. c.p. 323 ; 

 Dew. Car. I. c. 10. p. 39 ; Beck, hot. p. 436 ; Kunth, enum. 2. p. 432. C. polygama, Schk. 

 Car. t. X. & Gg.f. 76. C. canescens, Boott in Hook. Brit.fl. (ed. 4.) p. 335, and in Hook, 

 fl. Bor.-Am. 2. p. 216 ; Linn. sp. 2. p. 974 (in part). 



Culm about 2 feet high, triquetrous, nearly smooth, leafy below. Leaves shorter than the 

 culm. Spikes 3 or sometimes 5, half an inch or more in length ; the upper ones rather ap- 

 proximated ; the lowest distant, and subtended by a long foliaceous bract. Sometimes the 

 uppermwst spike is entirely sterile. Scales of a bright chestnut-brown, with a pale midrib. 

 Perigynium mostly a little shorter than the scale, nerveless ; the orifice furnished with two 

 minute but distinct teeth. Achenium triquetrous, oblong, crowned with the continuous style. 



Sphagnous swamps ; northern and western counties : rare. Fl. May. Fr. June. Our 

 plant is in all respects the same as the European C. Buxbaumii. 



33. Carex triceps, Michx. Three-headed Pubescent Sedge. 



Spikes mostly 3, oblong , terminal one pedunculate , the others fertile, sessile and rather 

 distant ; perigynium broadly obovate, very obtuse, entire at the orifice, strongly nerved, pu- 

 bescent when young, but finally almost smooth, shorter than the oblong acute scale ; sheaths 

 and leaves pubescent. — Michx. fl. 2. p. 170 ; Ell. sk. 2. p. 538 ? ; Torr. cat. in geol. surv. 

 p. 186 ; Kunth, enum. 2. p. 430. C. hirsuta, Willd. sp. 4. p. 252 ; Schk. Car. t. Www. 

 /. 172 ; Schwein. 4- Torr. Car. I. c. p. 322 ; Beck, hot. p. 436 ; Darlingt. fi. Cast. p. 32. 

 C. viridula, Schwein. <^ Torr. I. c. (excl. syn. Michx.). 



var. pedunculata : spikelets oblong-cylindrical, pedunculate ; leaves scarcely pubescent. — 

 C. hirsuta, var. pedunculata, Schwein. <^ Torr. I. c. 



Culm 12-18 inches high, triquetrous, rough, leafy. Leaves narrowly linear, rough on the 

 margin, more or less pubescent, as are also the sheaths. Spikes sometimes 4 or only 2, 6 - 8 

 lines long and about 2^ lines in diameter ; the terminal one clothed at the base with sterile 

 lanceolate scales ; the others on very short peduncles : lowest one with a leafy bract at the 

 base. Perigynium marked on each side with 7-9 nerves, a little pubescent when young, 

 but nearly or quite smooth when mature, yellowish green. Achenium triquetrous -obovoid, 

 puncticulate-striate. 



Woods and meadows. Fl. May. Fr. End of June or beginning of July. 



