PLAiQTS Oi^' BEftMUDA. 97 



than the others ; spikeletd many -flowered, much compressed, one- 

 half to three-quarters of an inch long ; glumes distinct at the top, 

 brown on the sides, keel green ; stamens and styles two ; nut ob- 

 long, blunt, rough. Distribution, United States ; habitat, borders 

 of marshes, north of Hamilton, August to October. 



2. C. rotundus, Z., vel. C. hydra (Nutgrass). Perennial; under- 

 ground stems slender, creeping and branching, bearing ovoid tubers ; 

 stem triangular, erect, six to twelve inches high ; leaves smooth, 

 sliining, as long as the stem, flat, channelled; umbels unequal, 

 three to seven rayed ; involucre of three to five unequal leaves ; 

 spikelets flat compressed, alternate, many-flowered ; stamens and 

 styles three ; nut triangular. Distribution, Jamaica and United 

 States ; habitat, found everywhere throughout the Islands — a most 

 troublesome and pernicious weed in cultivated ground. Spikelets 

 half an inch long, brown ; May to July. 



3. C.Jlexmsus. Stem smooth, triangular, two to three feet high ; 

 umbel large, irregular, involucre of six to ten long, irregular leaves ; 

 spikelets sub -cylindrical, slender, few-flowered, quarter-inch long ; 

 styles and stamens three ; nut triangular. Distribution, Jamaica ; 

 habitat, borders of marshes. 



4. G. ligiilaris. Stem triangular, about two feet high ; involucral 

 leaves five to eight, very long, unequal ; umbel three to seven rayed, 

 irregular, the rays terminating in dense, blunt, ovoid heads ; spike- 

 lets lanceolate, turning every way, fifty to sixty in each head. 

 Distribution, West Indies ; habitat, fields, Paget. Heads half-inch 

 diameter; September. 



II. K.ILLINGIA. 



Heads solitary or few ^ terminal ; spikelets densely clustered^ cotitaining 

 one fertile flower and two or three empty glumes. 



1. K. monocephala, \q\. K. cruciformis (Bog-rush). Hliizome creep- 

 ing, stem erect, eight to twelve inches high, bearing several flat, 

 narrow leaves ; heads solitary, globose, quarter-inch diameter; in- 

 volucre cruciform, three-leaved, the upper leaf longer and erect ; 

 glumes membranous, with a green keel ; styles two ; nutlet com- 

 pressed. Distribution, West Indies ; habitat, all marshes, common. 

 Heads pale green ; July to October. 



III. eleochaeis, 



^tem simple, leafless; spike iractless, solitary, terminal, cylindrical, 

 with the scale-like glumes imbricated all round ; nut croivned with the 

 hulbous base of the style. 



1. E. equisetoides (Spiked rush). Stems cylindrical, erect, two to 

 three feet high, with twenty to thirty joints, corresponding with 

 internal pithy partitions ; spike appearing as a continuation of the 

 stem, an inch long, scales roundish, chaffy, obtuse ; florets supported 

 by six short, rigid bristles. Distribution, United States and West 

 Indies ; habitat, marshes, common.. July to October, 



