332 SEDGE FAMILY 



n. Perigynia somewhat flattened ; beak 

 short or none 

 (m) Spikes dark brown-purple, 1- 



1.5 cm. long C. Tolmiei 



(n) Spikes variously green and 



purple, 2-4 cm. long C. aqudtilis 



Cyperus Linne 1753 Galingale 



(The Greek name) 



PL 44, fig. 15. 



Spikelets flattened, scales falling away from the axis at maturity, in 

 umbels or heads ; flowers perfect, wth concave or keeled, 2-ranked scales, 

 perianth none, stamens 1-3, style 2-3-cleft; leaves more or less basal, grass- 

 like, 1 or more of the upper leaves forming an involucre ; annual or peren- 

 nial with triangular stems. 



1. Stems 1-6 in. high; annual; spikelets 4-6 mm. 



long ; scales with a long, recurved point ; sta- 

 men 1 C. inflexus 



2. Stems .5-2.5 ft. high ; perennial ; spikelets 6-16 



mm. long ; scales without a recurved 'point ; 

 stamens 3 



a. Spikelets in 1-7 dense, globose heads C. filiciilmis 



b. Spikelets in loose clusters, several of which 



are sessile and some stalked C. Schweinitsii 



Elyna Schroter 1806 Elyna 



(Gr. elynos, covering, perhaps from the overlapping scales) 



PI. 44, fig. 19. 



Spikelets in a narrow, terminal, cylindric spike, scales of the spikelet 

 3-4, usually only 1 flower-bearing ; perianth-bristles wanting, style 3-cleft, 

 achene 3-angled ; leaves narrowly linear, basal ; tufted arctic and mountain 

 sedges. 

 Stems 4-15 in. high; spike 1.5-3 cm. long; achenes 3- 



4 mm. long, appressed E. Belldrdi 



Eriophorum Linne 1753 Cotton Grass 



(Gr. erion, wool, phora, bearing, from the cotton-like bristles) 



PI 44. fig. 14. 



Spikelets terminal, solitary or in heads or umbels, often with a 1-sev- 

 eral-leaved involucre ; flowers perfect, with spirally imbricated, usually fer- 



