528 XYlilDACK.K. (VKLLOW-KYKI) (iKASS KA.MILV.) 



7. X. difFormis, < 'li:i|iin. Sciijics clnslercd, skMidcr, Himmtli, widely 2- 

 edgeil aliovc, tfiuto ur 1 - i!-aiiglcii lulow; leaves tliiii, liiiciir laiicenlate, 

 sniuutli ; spikes iiiiiiiy-Huwered, ovate, acute, eveu, often 2-4-eleft; lateral 

 sepiUs laiieeolale, with the i)roadly winged keel iiicised-linihriate ; jjctals oho- 

 vate ; seeds elliptieal, smooth. — Swamps near the coast, West Florida. 

 .Inly. — Scapes 1°-!^^ higli. Leaves 'J' -15' lung. Sjiikes 6"- 9" long. 

 Petals small. 



8. X. serotina, ('lia])ni. Scajies elustorefl, twisted, and mostly spiral, 

 rough-angled and li-edged above, striate ; leaves linear-lanceolate, rigid, rough 

 on the edges; spikes many-Howered, ovoid, obtuse, dark hrown, even ; liracts 

 ruund-obovate, closely imbricated ; lateral sepals linear, narrowly winged 

 above, fimbriate and at length incised ; petals small, obovate ; seeds ovoid, 

 pulverulent. — Varies witli shorter leaves {2'-3'), and smaller globo.se or 

 ovate heads. — I'ine barren swamps. West Florida. Sept. -Oct. — Scapes 

 1° - 1 ;^° high. Leaves 8' - 12' long. Spikes 6' - 9' long. I'etals 2" long. 



9. X. elata, Chajim. Scapes elongated, slender, smooth, terete below, 2- 

 edged above ; leaves long, linear, smooth ; spikes rugose, oblong or oval, often 

 acute, many-tlowered ; scales dark brown ; lateral sepals linear-lanceolate, 

 sparingly toothed on the narrowly winged keel ; petals wedge-oiiovate ; seeds 

 elliptical, smooth. — Sandy swamps near the coast. West Florida. Julyr- 

 August. — Scapes 3°--!° high. Leaves I^°-2*' high. Spikes ^'-1' long. 

 Petals 2" long. 



10. X. Caroliniana, Walt. Scapes several, smooth, rigid, 1 - 2-angled 

 below, compressed and 2-edged above i leaves linear or linear-lanceolate, 

 smooth; spikes rugose, oblong-ovate, obtuse, many-flowered; bracts light 

 brown, thick, the margins thin and soon lacerate ; lateral sepals linear-lanceo- 

 late, acute, the narrowly winged keel cut-fringed above the middle ; petals 

 obovate; seeds ovoid. — Shallow ponds and swamps, Florida, and north- 

 ward. July- August. — Scapes \°-2^ li'gh. Leaves 6'- 15' long. Spikes 

 6"- 12" long. 



11. X. iridifolia, Chapm. Rigid, smooth and shining; scape stout, 

 terete or 1-angled below, dilated and 2-edged above ; leaves long, strap-shaped ; 

 spikes oval or oblong, olituse, rugose, many-flowered ; bracts dark brown, very 

 thick, strongly convex ; lateral sepals linear, membranaceous, the keel fimbri- 

 ate and at length incised throughout ; petals round-obovate ; seeds lanceolate, 

 angled, pulverulent. — Shallow ponds, Florida. August - Oct. — Scape 2° - 

 3° high, 2"-3" in diameter. Leaves 2°-2i° long, ^'- 1' wide. Spikes 1' 

 long. Petals 3" long. 



12. X. platylepis, Chapm. Scapes mostly twisted and spiral, angular 

 below, 2-edged above, roughish ; leaves linear and lanceolate, twisted, smooth; 

 spikes large, oblong or cylindrical, obtuse, many-flowered ; bracts pale brown 

 or whitish, orbicular, thin, closely imbricated ; lateral sepals linear, the keel 

 narrowly winged, fimbriate toward the apex ; petals small ; seeds elliptical, 

 smooth (X. flexuosa, Ell. ^) — Low sandy places, Florida to South Carolina. 

 July - Sept. — Scape 2'='-3° high. Leaves 9'- 15' long. Spikes f'-U' 

 long. 



