500 XYRIDACF.iE. (tELLOW-EYED GIIASS FAMIKV.) 



fan, laterally curved; spikes ohlonj^, mostly acute, fcw-flowcrcd, nn^^ular ; bracts 

 li^lit l)iown, entire; lateral sepals lanceolate, sliort-fringed on the win;;less keel; 

 j)etals ol)t)vatc ; sterile filaments often beardless. — Low pine barrens, near the 

 coast, AVest Florida. April and May. — Seape 4'- 12' high. Leaves ^'- 1' long. 

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



^ 2. S/icuth of the scape shorter than the leai^es. Perennials. 



^ Sterile filaments bearded : sepals included. 



-t- Lateral sepals fringed on the heel. 



•3. X. arabigua, Kcyr. Scape rigid, finely fuiTOwed, rough, 2-cdged 



above, 1-angled below ; leaves linear-lanceolate, rough on the edges ; spike 



ovate-lanceolate or oblong, even, often acute, many-flowered ; bracts light brown, 



oval, not crowded on the spike ; lateral sepals lanceolate, tapering at each end, 



shining, narrowly winged; petals round obovato; seeds ovoid. — Open grassy 



pine barrens, Florida to North Carolina. July - Sept. — Scape 2° -3° high, 



mostly solitary. Leaves 6'- 12' long. Spikes 9" -15" long. Petals ^' long. 



4. X. stricta, n. sp. Scape flattened and broadly margined, rough-edged 

 above, smooth and 1 - 2-anglcd below, slightly striate ; leaves long, linear, 

 smooth ; spikes oblong or cylindrical, obtuse, many-flowered ; bracts dark 

 brown, orbicular, crowded on the spike ; lateral sepals broadly winged above 

 the middle, narrowed below ; petals small, wcdge-obovate ; seeds ovoid. — 

 Shallow ponds in the pine barrens, West Florida. July - Sept. — Scapes 

 slender, clustered, 2° -3° high. Leaves 1°-1^° long. Spikes 9"- 12" long. 

 Petals 2" long. 



5. X. flexuosa, Muhl. Somewhat bulbous ; scape smooth, 2-edged above, 

 nearly terete below ; leaves linear, smooth ; spikes globose, few-flowered ; lateral 

 sepals lanceolate, wingless. (X. bulbosa, Knnlh.) — Swamps in the upper dis- 

 tricts of Georgia, and northward. July -Sept. — Scape C- 12' high. Leaves 

 4' - 8' long. Spike 3" - ."j" long. 



■*- -I- Lateral sepals broadly ivinr/ed, and rariousli/ toothed or fimbriate. 



6. X. EUiottii. Scape slender, flattened and 2-edged throughout, or 1- 

 edgcd below, roughish and mostly spiral ; leaves narrowly linear, sharp-edged, 

 twisted ; spike few-flowered, elliptical, obtuse ; lateral sepals linear, the wing 

 cut-toothed above the middle ; petals obovate. (X. brevifolia. Ell. ex dcscr.) — 

 Wet grassy pine barrens, Florida to South Carolina. July. — Scape 1°-!^'' 

 high. Leaves 6' -9' long. Petals 3" long. 



7. X. difibrmis, n. sp. Scapes clustered, slender, smooth, widely 2-edged 

 above, terete or 1 - 2-angled below ; leaves thin, linear-lanceolate, smooth ; spikes 

 many-flowered, ovate, acute, even, often 2- 4-cleft; lateral sepals lanceolate, with 

 the broadly winged keel incised-fimbriatc ; petals obovate ; seeds elliptical, 

 smooth. — Swamps near the coast. West Florida. July. — Scapes 1°- 1^° high. 

 Leaves 9'- 15' long. Spikes 6"- 9" long. Petals small. 



8. X. serotina, n. sp. Scapes clustered, twisted and mostly spiral, rough- 

 angled and 2-edgcd above, striate ; leaves linear-lanceolate, rigid, rough on the 

 edges; spikes many-flowered, ovoid, obtuse, dark brown, even; bracts round- 



