AUG. 1900. 



PLANT/E UTOWATSLE MILLSPAUGH. 



117 



Achene in section elliptical, the angles prominent; surfaces marked 

 by irregular, sometimes branching, horizontal smooth and shining 

 ridges. 



Moist banks and ditches at Bayamon, Porto Rico (338), and at 

 Port Antonio, Jamaica (927). 



DICHROMENA COLORATA (L.) Hitch. PI. Baham. 141. 



Schcenus coloratus Linn. 



Dichromena pubera and radicans Britton, on page 30. 



Dichromena leucatephala Michx. 



Bracts 3-5, deflexed-spreading, 5-10 cm. long, basal portion white. 

 Inflorescence in white globose 

 heads 10-14 mm. wide, com- 

 posed of 8-16 ovoid spikelets 3 

 x 5-8 mm., i-3-fruited; scales 

 white with a hyaline border, con- 

 oid, subacute, keeled, nearly 

 three times the length of the 

 achene. Stamens 2. Achenes 

 {excluding the beak) dark cinna- 

 mon-brown, obovoid, 1.2x1.15 

 mm. Beak broadly - conical, 

 darker than the achene, .5im. 

 high. Achene in section lenticu- 

 lar, the angles strongly marked, 

 the surfaces marked by prominent horizontal intermitting ridges 

 composed of oblong, raised cells, the interspaces shallow and 

 narrow. 



In a bog back of Paget's Landing, Bermuda (54, 60); moist 

 meadow at Catafio, Porto Rico (152); and boggy soil near the center 

 of the island of Grand Cayman (1375). 



DICHROMENA RADICANS Cham, and Schl. Linnea 6:38. 

 Dichromena pubera and nervosa Vahl. in part. 



Bracts 3-5, minutely ciliate and sometimes white at the base. 



Heads 8 x 10 mm., composed of 

 1-3 light cinnamon-brown spike- 

 lets 9x3 mm., lanceolate, 5- 

 fruited; scales with darker cin- 

 namon keel, triangular - ovate, 

 obtuse, 3-times the length of the 

 achene. Stamens 3. Achenes 

 (excluding the beak) dark-brown, 

 orbicular, .gx i mm. Beak black, 

 sharply conical, mitriform, .3 

 mm. high. Achene in section 

 elliptical, the angles slightly 

 marked; the surfaces marked by 

 about 12 horizontal, intermittent 

 ridges composed of small, oblong, raised cells, with deep broad inter- 

 spaces. 



Wet soil, near the center of the island of Cozumel (1562). 



