5b4 CLIX. ERICA ULONACE^. Eriocaolou 



linear-ensiform, more or less twisted, acute, rigid, erect, shorter than the scp"^; 

 head oblong-globose, obtuse; scales coriaceous, imbricated, obtuse, conca».e, 

 scarious and yellowish at edge ; lower ones empty ; sep. not exserted ; clawi. of 

 petals as long as the scales. — 11. Meadows, swamps and prairies, U. S. not un- 

 common. Scape firm and wir}', often twisted or llexuous, 1 — 2t'high, 1" diam. 

 Leaves few, fiat, 6 — 12' by 2 — 3," clasping or equitant at base. Petals yellow, 

 limb spreading, retuse. July, Aug. 



p. brevifulia. Wood. (X. brevifolia. Mr.) //r.?. linear-subulate, short, much 

 twisted. — Evidently a variety of this polymorphous species. 



y. 7 OLncyi. Wood. Lvs. larger, nearly as long as the scape ; strongly equi- 

 tant-clasping at base ; scales rather loosely imbricated ; scp. a little exserted ; 

 filaments hairy. — Cumberland, R. I., Olncy I Scape 18 — 34' high. Leaves 3 — 

 4" wide. — Perhaps distinct, but its claims cannot now be satisfactorily deter- 

 mined. 



2. X. FiMBRiATUS. Ell. Fringed Xyris. 



Scape tall, erect; lis. linear-en.'iiform, about equaling the scape; head ob- 

 long, with the scales loosely imbricated; sepals much exserted, fimbriate. — A 

 large species, Ibund in N. J. {Darlington) S. to Ga., Elliott. Scape 2 — 3f high. 

 — I have never seen this species. 



Order CLIX. EIIICAULONACE^.— Pipeworts. 



Uerhs perennial, aquatic, with linear, spongj', cellular leaves sheathing at base. 

 Fts. monfficioiis or (licecioiis, in a liense head. Peiianlh 2— S-parted, or wanting. 

 Sta. 6, some of them generally alioriive. Aiit/u:rs mostly 1-celiecl. 

 OiJ<2. 1 or more-celled, cells 1 -seeded. "See,* pendulous. 

 Genera 9, species 200, chiefly South American. They are of no known use. 



ERIOCAULON. 



Gr. cpiov, wool, Kav\os, stem; the stem being sometimes woolly or tomentose. 



Flowers c? , collected into an imbricated head ; involucre many- 

 leaved, c? in the disk ; perianth single, 3-cleft, the 2 inner seg- 

 ments united nearly to their summit ; stamens 4 — 6. 9 in the 

 margin ; perianth single, deeply 4-parted ; style 1 ; stigmas 2 or 3 ; 

 capsule 2 — 3-celled, 2 — 3-lobed ; cells 1 -seeded. 



1. E. SEPTANGur.ARE. With. (E. pellucidum. Mickx.) Pipewort. 

 Smooth; scape slender, about 7-ftirrowed ; lvs. linear-subulate, pellucid, 



channeled, 5-\'eincd ; hd. small, globose ; scales of the hivnlucre obtuse. A 



small plant of simple structure, in water, only the scape arising above the sur- 

 face. Leaves radical, submersed, in a small tuft at the bottom, 1 — 3' by 1 2", 



tapering to a point, transparent at base. Stem simple, erect, 4 — 12' high, with 

 a small, terminal, hemispherical head of close, white flowers. Jn. 



2. E. DKCANGULAnK. Miclix. Tall Pipewort. 



Scape 10-furrowed; lvs. ensiform, glabrous; hds. large, depressed-globose: 

 bivol. scales oval, acute, those of the receptacle mucronate. — Ponds, N. J. ti 

 Car. Scape 2 — 3f high. Flowers very white. Aug. 



3. E. GNAPHALolDEs. .Michx. (E. decangulare. Walt.) 



Scape somewhat compres.sed, with 10 furrows; lvs. short, subulate, ensi- 

 form, glabrous; hds. hemispheric-convex; iiirol. of shining, scariou.?, ova*. 

 round-obtuse sc^ales. — In still waters. Scape 10—14' high. July. 



