98 PUBLIC HEALTH BULLETIN NO. 2 86 



10. Cladium P. Browne 



1. Leaves smooth and unarmed l.C mariscoides. 



1. Leaves spinulose on margins and midribs beneath 2. C. jamaicensis. 



1. C. mariscoides (Mulil.) Torr. — Not observed by the writers, but 

 supposed to occur south to Florida in our territory, 



2. C. jamaicensis Crantz. Saw-grass — The famous vicious Saw- 

 grass of the Everglades, occurs also along the coast to the limits of our 

 territory. Most common in Florida and along the Gulf of Mexico 

 in fresh to brackish situations. Both of these species are placed in the 

 genus Mariscus by Small. 



11. Scleria Berg. 



1. Achene bearing a disk-like body (hypogynum) below __ 2. 



1. Achene without a hypogynum 3. 



2. Achene body reticulate 1. <S. muhlenhergii. 



2. Achene body papillose 2. S. pavciflora. 



3. Spikelets in a single terminal cluster 4. 



3. Spikelets in several distant clusters along the upper 5. 

 part of the stem. 



4. Achene 3 mm. long or less with a pair of 3. S. georgiana. 



prominent pits on each side of base. 



4. Achene over 3 mm. long, without prominent 4. S. haldwinii. 

 pits on each side of base. 



5. Achene papillose-ridged; bracts merely serrulate near 5. *S'. verticillata. 



apex. 



5. Achene smooth; bracts with long spreading hairs near 6. S. hirtella. 

 apex. 



1. S. muhlenhergii Steud.^ — Acid aquatic areas, should be well dis- 

 tributed over our territory, especially in the Coastal plain. 



2. S. pauciflora Muhl. — Should be distributed much as the preced- 

 ing. 



3. (S. georgiana Core — Acid places. Coastal Plain, north m our 

 territory to South Carolina. Cited by Small, as aS. gracilis Ell. 



4. S'. haldwinii (Torr.) Steud. — Coastal Plain, found only in the 

 Southernmost part of our territory from Florida westward along the 

 Gulf. 



5. S. verticillata Muhl. — Coastal Plain, Florida north and west 

 beyond the limits of our territory. 



6. S. hirtella Swartz — Coastal Plain, north only to South Carolina 

 but westward beyond the hmits of our range. 



12. Carex jRupp.] L. 



1. Acheiie.s lenticvilar; styles 2 2. 



1 . Achenes 3-sided ; styles 3__ ..... 11. 



2. Lateral spikes sessile 3. 



2. Lateral .spikes stalked \. C. stricta. 



3. Spikes with staminate floxrers uppermost 4. 



3. Spikes with pistillate Uowers uppermost (lower spikes 



sometimes all pistillate) ._ .- 6. 



