APPENDIX. 



This appendix contains descriptions of additional plants found within the region 

 covered by this work during the several years the book has been in press, and corrections. 



Page 31, for the second " appressed " in the key under Taxodium read " erect." 



Page 170, after Cyperus speciosus, insert : 



44a. Cyperus longispicatus Norton. Perennial. Leaves much overtopped by the 

 scape ; blades 1-2 cm. wide, or sometimes narrower : scape erect, mainly 1-2 m. tall, 

 smooth : bracts of the involucre several, 1 cm. wide, often 1 m. long : umbel compound ; 

 rays 15 cm. long or less : spikes mainly 2-3 cm. long : spikelets 2-4 cm. long, slender, 

 20-40-flowered, light yellowish brown ; scales ovate, short-tipped, nerved between the green 

 back and membranous margins : achenes 3-angled, obpyramidal, about 1 mm. long, light 

 brown, abruptly pointed. 



In water or low grounds, Florida to Texas and Mexico. Spring to fall. 



Page 172, after Cyperus ovularis, insert : 



55a. Cyperus globulosus Aubl. Similar to C. ovularis in habit, but commonly more 

 robust. Heads 11-21 mm. long, echinate, yellow-brown : spikelets much larger than those 

 of C. ovularis ; plants somewhat resembling those of C. echiviatus, but achenes narrow.' 



In fields and open woods, Florida and Alabama. Also in tropical America. Summer and fall. 



Page 172, after Cyperus retrortus, insert : 



56a. Cyperus Pollardi Britton. Perennial by small corms. Leaves shorter than 

 the scape ; blades usually less than 3 mm. wide : scapes 6-13 dm. tall, smooth : inflorescence 

 of few unequally peduncled heads : bracts of the involucre usually 4, one or sometimes two 

 of them surpassing the heads : spikelets 3-4.5 mm. long, the scales loose, or deciduous at 

 maturity : achenes linear-oblong, about 1.5 mm. long. 



In pine woods and on prairies, peninsular Florida. Spring to fall. 



56b. Cyperus Nashii Britton. Perennial, mostly tufted. Leaves shorter than the 

 scape ; blades less than 4 mm. wide : scapes 4-11 dm. tall, smooth : inflorescence of nu- 

 merous (15-20) slender-peduncled heads : bracts of the involucre typically 7-11, several of 

 them surpassing the heads : heads 1 cm. long or a little less, often compound : spikelets 

 rather crowded, 2-3 mm. long, acute, the scales appressed, persistent : achenes linear or 

 nearly so, 2 mm. long. 



In pine lands, peninsular Florida. Spring to fall. 



Page 176, in second line of the key under Scirpus strike out u or rarely 2 in No. 5," 

 and add " smooth" after "perianth-bristles" in the last line. 



Page 195, .after Rynchospora Curtissii, insert : 



18a. Rynchospora fusca (L. ) Ait. f. Stems slender, 1.5-4.5 dm. tall, smooth: 

 leaf-blades filiform-setaceous, channeled, shorter than the stems : spikelets fusiform, about 

 5 mm. long, acute, in 1-4 loose clusters ; scales brown, shining : perianth-bristles 6, often 

 unequal, upwardly barbed : achenes narrowly obovoid, smooth, shining ; tubercle triangu- 

 lar-subulate, nearly as long as the achene-body. 



In bogs and about pine-land ponds, New Brunswick to Michigan and Georgia. Also in Europe. 

 Summer. 



Page 196, after Rynchospora gracilenta, insert : 



22a. Rynchospora Smallii Britton. Stems relatively stout, 8-14 dm. tall, tufted : 

 leaf -blades flat, 2-5 mm. wide : spikelets numerous in several rather loose clusters, fusi- 

 form, 3-4 mm. long ; scales brown, lax, and deciduous at maturity : perianth-bristles up- 

 wardly barbed, as long as the achene and tubercle : achenes narrowly obovate, brown, 

 smooth and shining, 1.5 mm. long excluding the tubercle, the tubercle smooth, about J as 

 long as the achene-body. 



In bogs and on damp hillsides, Pennsylvania and western North Carolina. Summer and fall. 



1321 



