502 ERIOCAULONACE^E. (PIPEWORT FAMILY.) 



tumid and dark brown at the base. Spikes 1' H' long. Petals 9" long, ex- 

 panding at midday. 



* * * Sterile filaments beardless: leaves filiform. 



15. X. tenuifolia, n. sp. Smooth ; scape slender, 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. 



16. X. Baldwiniana, R. & S. (X. juncea, Baldw.) "Root perennial; 

 scape terete, sheathed at the base, 6' -12' high ; leaves 4' -8' long, terete, hol- 

 low, acute ; head oval ; bracts nearly round ; calyx about as long as the bracts, 

 the keel slightly toothed, filaments naked." Baldwin in Ell. Damp pine bar- 

 rens, near St. Mary's, Georgia. May and June. ( * ) 



ORDER 158. ERIOCAULONACEvE. (PIPEWORT FAMILY.) 



Perennial chiefly stemless marsh herbs, with narrow tufted leaves, and 

 minute monoecious or dioacious flowers, collected in a dense hairy chaffy- 

 bracted head. Stam. Fl. Sepals 2-3. Corolla tubular, bilabiate or 

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

 Pist. Fl. Sepals and petals 2-3. Ovary 2-3-oelled, with a single 

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

 dally 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 1-oelled. Style 2-3 parted, the lobes entire, or 



2-cleft. 



1. ERIOCAULON, L. PIPEWORT. 



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-parted: 

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

 mostly from a short and villous rootstock. Lobes of the corolla furnished with 

 a blackish gland on the inner face, commonly bearded with club-shaped hairs. 

 The following species are all tetrandrous, with a 2-parted style and a 2-celled 

 capsule. 



