ERIOCAULOXACE.E. (PIPEWORT FAMILY.) 529 



* * Sterile filaments bearded : sepals exserted. 



13. X. fimbriata, Ell. Not bulbous; scape tall, furrowed, rough, 2- 

 edged above ; leaves long, strap-shaped, smooth ; spikes ovate, acute, many- 

 flowered ; lateral sepals long fimbriate above the middle ; petals small. — 

 Ponds and miry places, Florida, and northward. Sept. -Oct. — Scapes 3° -4° 

 high. Leaves li°- 2° long. Spikes 9"- 12" long. Petals 3" long. 



14. X. torta, Smith. Bulbous; scape nearly terete, 1-edged, smooth, 

 mostly spiral ; leaves linear, rigid, concave, with rounded edges, mostly spiral ; 

 spikes pale, lanceolate or cylindrical, acute; lateral sepals winged and' fimbri- 

 ate above the middle ; petals large, round-obovate. — Sandy, often dry soil, 

 Plorida, and northward. July -Sept. — Scape l|°-2° high. Leaves few, 

 6'- 12' long, tumid and dark brown at the base. Spikes T- I3' long. Petals 

 9" long, expanding at midday. 



* * * Sterile filaments beardless : leaves filiform. 



15. X. Baldwiniana, R. & S. Smooth; scape sleuder, terete or 1- 

 angled ; leaves filiform or bristle-like, compressed ; spikes ovoid, few-flowered ; 

 lateral sepals lanceolate, the narrowly winged keel cut-serrate ; petals obovate ; 

 seeds linear-oblong, smooth. — Open grassy pine-barren swamps, Florida to 

 North Carolina. July -Sept. — Scapes clustered, 10'- 12' high. Leaves 4'- 

 6' long. Spikes 2" -4" long. Petals 3" long. 



Order 160. ERIOCAULONACE^. (Pipewort Family.) 



Perennial chiefly stemless marsh herbs, with narrow tufted leaves, 

 and minute monoecious or dioecious flowers, collected in a dense hairy 

 chaffy-bracted head. — Stam. Ft. Sepals 2-3. Corolla tubular, bi- 

 labiate or 3-toothed, or sometimes wanting. Stamens 2 - 6 : anthers 

 introrse. — Pist. Fl. Sepals and petals 2-3. Ovary 2 - 3-celled, with 

 a single orthotropous ovule in each cell. Style 2 - 3-parted. Capsule 

 loculicidally 2 - 3-valved, 1 - 3-seeded. Embryo minute at the apex 

 of the albumen. — Leaves concave and partly clasping at the base. 

 Scape furrowed and commonly twisted, with a spathe-like sheath at 

 the base. Exterior scales broader, empty, and involucrate. Flowers 

 fringed with white club-shaped hairs. Corolla white. 



Synopsis. 



1. ERIOCAULON. Stamens 4. Anthers 2-celled. Style 2-parted. Corolla 2-lipped. 



2. P^PALANTHUS. Stamens 3. Anthers 2-celled. Style 3 parted, the lobes entire. 



3. LACHNOCAULON. Stamens 3. Anthers l-celled. Style 2 - 3-parted, the lobes entire, 



or 2-cleft. 



1. ERIOCAULON, L. Pipeavort. 



Flowers monoecious, each in the axil of a scale-like bract. Sepals 2-3. Co- 

 rolla of the staminate flowers tubular, 2-lipped or 3-lobed ; of the pistillate 

 flowers 2 - 3-petalous. Stamens 4 or 6 : anthers 2-celled. Style 2-3-i)arted : 

 stigmas 2 - 3. Capsule 2 -3-celJed, 1 - 3-seeded. — Scapes single or numerous, 



34 



