CYPERACE^. (sedge FAMILY.) 567 



)les Terminated by a single head, involucrate by some outer empty bracts. 

 Flowers, also the tips of the bracts, etc., usually white-bearded or woolly- 

 (Name compounded of epiou, wool, and kouAo's, a stalk, from the wool at the 

 base of the scape.) — Our species are all stemless, wholly glabrous excepting 

 at the base and the flowers, witli a depressed head and dimerous flowers. 



1. E. decangulare, L. Zc«re5o6^Mse, varying from linear-lanceolate to 

 linear-awl-shaped, rather rigid; scapes 10- 12-ribbed (1 -3° high) ; head hemi- 

 spherical, becoming globular (2-7" Avide) ; scales of the involucre acutish, 

 straw-color or light brown; cAq^ (bracts among the flowers) pointed. — Pine- 

 barren swamps, X. J. to Fla. July - Sept. 



2. E. gnaphalodes, Michx. Leaves spreading {2- ft' long), grasstj-awl- 

 shaped, rigid, or when submersed thin and pellucid, tapering gradually to a 

 sharp point, mostly shorter than the sheath of the 10-ribbed scape ; scales of 

 the involucre very obtuse, turning lead-color; chaff obtuse. — Pine-barren 

 swamps, N. J. to Fla. 



3. E. septangulare, Withering. Leaves short (l-S" long), awl-shaped, 

 r>ellucid, soft and very cellular ; scape 4 - 1 -striate, slender, 2-6' high, or when 

 submersed becoming 1 - 6° long, according to the depth of the water; chaff 

 acutish ; head 2 - 3" broad ; the bracts, chaff, etc., lead-color, except the white 

 coarse beard. — In ponds or along their borders, Newf. to N. J., west to Ind., 

 Mich., and Minn. July, Aug. (Eu.) 



2. P-aiPALANTHUS, Martius. 



Stamens as many as the (often involute) lobes of the funnel-form corolla of 

 the sterile flowers, and opposite them, commonly 3, and the flower ternary 

 throughout. Otherwise nearly as in Eriocaulon. (Name from iranrd\7], dust 

 or flour, and 6.vdos, flower, from the meal-like down or scurf of the heads and 

 flowers of many South American species.) 



1. P. flavidulus, Kunth. Tufted, stemless; leaves bristle-awl-shaped 

 (1' long); scapes very slender, simple, minutely pubescent (6-12' high), 5- 

 angled ; bracts of the involucre oblong, pale straw-color, those among the flow- 

 ers mostly obsolete ; perianth glabrous ; sepals and petals of the fertile flowers 

 linear-lanceolate, scarious-white. — Low pine-barrens, S. Va. to Fla. 



3. LACHNOCAULON, Kunth. Hairy Pipewort. 



Flowers monoecious, etc., as in Eriocaulon. Calyx of 3 sepals. Corolla none ! 

 Ster. Fl. Stamens 3 ; filaments below coalescent into a club-shaped tube around 

 the rudiment of a pistil, above separate and elongated ; anthers 1-celled ! Fert, 

 Fl. Ovary 3-celled, surrounded by 3 tufts of hairs (in place of a corolla). Stig- 

 mas 3, two-cleft. — Leaves linear-sword-shaped, tufted. Scape slender, bearing 

 1 single head, 2 - 3-angled, hairy. (Name from Kaxvos, wool, and KavXos, stalk.) 



1- L. Michauxii, Kunth. — Low pine-barrens, Va. to Fla. 



Order 128. CYPERACE^. (Sedge Family.) 



Grass-like or rush-like herbs, withflbrous roots, mostly solid stems (culms), 

 elosed sheaths, and spi/ced chiefly 3-androus flowei's, one in the axil of each 

 <\f the glume-like imbricated bracts (scales, glumes), destitute of any perianth. 



