AUG. i goo. 



PLANTS UTOWAN^E MILLSPAUGH. 



121 



the base. Achene dull-black when ripe, ellipsoid, .65-. yx 1.4 mm., 

 in section triangular, the dorsal angle sharpest, dorsal facets 

 slightly concave, the ventral deeply so; all marked by faint irregu- 

 lar hexagonal ridges, the interspaces plane and centrally occupied 

 by large and prominent semi-globular papillae. 



Boggy spot in an open field at Catano, Porto Rico (156); low 

 sandy soil at Port Antonio, Jamaica (975, 978), and in a like situa- 

 tion at Spot Bay, Grand Cayman (1301). 



CYPERUS BRUNEUS Sw. Fl. Ind. Occ. , 1:116. 



Mariscus bruneus Clarke. 



Cyperus Ottonis Britton, on page 29. 



Bracts 4, leaf-like, .5-2.5 dm. long. Inflorescence a dense umbel, 



1.5-4 cm - wide, formed of 2-6 

 spikes, rays i cm. long. Spikes 

 crimson-lake turning darker with 

 age, subglobose, 14 mm. wide; 

 spikelets about 20, oblong, com- 

 pressed, divergent, 2x6 mm., 

 5-7-fruited. Scales with bright- 

 green keel, crimson-lake turning 

 to dull rusty-brown faintly 

 spotted with red, broadly ovate, 



/' 



obtuse, apiculate, strongly 

 nerved, nearly twice the length 

 of the achene. Style longer 

 than the achene, divided to near the base. Achene dull-black when 

 ripe, broadly obovoid .J-.gx 1.4 mm., in section flatly triangular, the 

 facets plane, the ventral having a prominent rounded margin at the 

 angles, and all three marked by nearly regular hexagonal grooves, 

 each interspace occupied by a deep circular pit with a raised lip. 



In a dry field near Playa, Porto Rico (683); and in a sandy 

 field near Progreso, Yucatan (1697). 



CYPERUS BRIZ^EUS Vahl. Enum., 316. 



Mariscus brizceus Clarke. 



Cyperus Ottonis Boeck. 



Cyperus bruneus Britton in 

 part, on page 28. 



Bracts 4, leaf-like, .5-3.5 dm. 

 long. Inflorescence a dense, 

 6-io-spiked umbel, 7 cm. wide; 

 rays .5-2 cm. long. Spikes 

 light reddish-brown at maturity, 

 subglobose, 2 cm. wide; spike- 

 lets oblong, compressed, diverg- 

 ently ascending, 2.5x10 mm. 

 long, 6-g-fruited. Scales bright 

 reddish-brown or pale roseate, 

 green keeled, ovate, apiculate, striate, twice the length of the 



