550 CYPERACE^E. (SEDGE FAMILY.) 



part, viz. as to pi. Clayt. E. compression, Lam.) Pine-barren swamps, New 

 Jersey to Virginia, and southward. June - Aug. 



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

 pellucid, soft and very cellular ; scape 7-striate, slender, 2' - 6' high, or when 

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

 acutish. (E. pellucidum, Michx.) In ponds or along their borders, from New 

 Jersey and Penn. to Michigan, and northward. Aug. Head 2" -3" broad ; 

 the bracts, chaff, &c. lead-color, except the white coarse beard. (Eu. Coast of 

 Ireland, &c. only.) 



2. PJEPALANTHUS, Mart. ( Sp. of ERIOCAULON of authors. ) 



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 TratTraXiy, dust 

 or flour, and avQos, flower, from the meal-like down or scurf of the heads and 

 flowers of many South American species.) 



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

 (!' 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. (Eriocaulon flavidum, Miclix.) Low pine 

 barrens, S. Virginia and southward. 



3. LACHNOCAULON, Kunth. HAIRY PIPEWORT. 



Flowers monoacious, &c., as in Eriocaulon. Calyx of 3 sepals. Corolla none ! 

 Ster. Ft. Stamens 3 : filaments below coalescent into a club-shaped tube around 

 the rudiments of a pistil, above separate and elongated : anthers 1 -celled ! Pert. 

 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, simple, 

 bearing a single head, 2-3-angled, hairy (whence the name from \a\vos, wool, 

 and KauXdy, stalk}. 



1. L. Michauxii, Kunth. (Eriocaulon villosum, Michx.) Low pine 

 barrens, Virginia (Pursh), and southward. 



ORDER 127. CYPERACEJE. (SEDGE FAMILY.) 



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

 closed sheaths, and spiked chiefly 3-androus flowers, one in the axil of each 

 of the glume-like imbricated bracts (scales, glumes), destitute of any perianth, 

 or with hypogynous bristles or scales in its place ; the 1-celled ovary with a 

 single erect anatropous ovule, in fruit forming an achenium. Style 2-cleft 

 when the fruit is flattened or lenticular, or 3-cleft when it is 3-angular. 

 Embryo minute at the base of the somewhat floury albumen. Stem-leaves 

 when present 3-ranked. A large, widely diffused family. (See Plates 

 1-6.) 



