ERTOCAULONACE^E. (PIPEWORT FAMILY.) 489 



American species are all stctnless, with a depressed head, and have the parts of 

 the flowers in twos, the stamens 4. 



1. E. dccaaigrnirsre, L. (syn. Pink., &c.) Leaves linear-sword-shaped, 

 ascending (6' -If/ lung), of a rather firm texture; scape 10-12-ribbed (l-3 

 high) : chaff (bracts among the flowers) pointed, ty (E. serotinum, Walt.) 

 Pine-banvn swamp*, New Jersey'? to Virginia, and southward. July -Sept. 

 Invoiucnil scales roundish, straw-color or light brown. Flowers and bracts, as 

 in the following, tipped with a white beard. 



2. E. gsiaplualodes, Michx. Leaves short and spreading (2' -5' long), 

 grassy-awl-shaped, soft and cellular, tapering gradually to a point, mostly 

 shorter than the sheath of the 10-ribbed scape; chaff obtuse. 1J. (E. deeangulare, 

 L., in part, viz. as to pi. Clayt.) Pine-barren swamps, New Jersey to Vir- 

 ginia, and southward. June -Aug. This and the last have been variously 

 confounded. 



3. E. Septanglllare, Withering. Leaves short (!'- 3' long), awl-shaped, 

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

 submerged becoming l-6 long (Torr.), 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.) 



2. P JE P A L, A W T II U S , 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 nanraXrj, dust or 

 Jiour, and avdos, flower, from the meal-like down or scurf of the heads and flow- 

 ers of many [South American] species.) 



1. P. fliivicltis, Kunth. Tufted, stemlcss ; leaves bristlc-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 

 (ternary) flowers mosfcly obsolete ; perianth glabrous ; sepals and petals of the 

 fertile flowers linear-lanceolate, scarious-white. 1J. ? (Eriocaulon flavidum, 

 Michx.) Low pine barrens, S. Virginia and southward. 



3. L,ACHNOCA1JL,O]V, Kunth. HAIRY PIPEWORT. 



Flowers monoecious, &c., as in Eriocaulon. Calyx of 3 sepals. Corolla 

 none ! Ster. Fl. 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). Stigmas 3, two-cleft. Leaves linear-sword-shaped, tufted. 

 Scape slender, simple, bearing a single head, 2-3-angled, hairy (whence the 

 name, from Xa^i/os, wool, and KauAof, stalk). 



1. JL. Micliaiixii, Kunth. (Eripcaulon villosum, Michx.) Low pine 

 ban-ens, Virginia (Pursh), and southwiurd. 



