362 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Wet ground, southern United States to Uruguay and Peru, whence originally 

 described. Grisebach ^ records this species from Trinidad, but to us it is known 

 from the West Indies only from Cuba (Lagoon Haiti, Mordazo, Le6n 5941). 



2. Luziola bahiensis (Steud.) Hitclac. Contr. U. S. Nat. Herb. 12: 234. 1909. 

 Caryochloa baJiiensis Steud. Syn. PI. Glum. 1: 5. 1854. 



Imziola alabamensis Chapra. Fl. South. U. S. .564. 1860. 



LuzioJa longivalvula Doell in Mart. Fl. Bras. 2: 17. 1871. 



A slender glabrous stoloniferous aquatic perennial with long linear blades (or 

 aerial blades shorter and 4 to 5 mm. wide), narrow starainate panicles termi- 

 nating the main culm, and open few-flowered pistillate panicle's terminating the 

 branches. Extremely variable in appearance according to the depth of water 

 in which the specimen grew. Plants growing in places from which water has 

 receded are low and widely creeping. 



Rivulets, Alabama to Brazil. Originally described from Bahla. 



Also in Cuba (Pinar del Rio, Wright 3813). 



3. Luziola spruceana Benth. ; Doell in Mart. Fl. Bras. 2*: 18. 1871. 



Culms thick, soft and spongy, freely branching; sheaths broad with long 

 erect auricles ; staminate panicles terminal ; pistillate panicles terminal and 

 axillary, corymbose, the numerous branches reflexed at maturity. 



Ponds and lagoons, Cuba to Brazil, whence originally described. Called 

 " pond-grass " in Trinidad. 



Cuba (Araguanabo Lagoon, Le6n 4193), Trinidad (probably near Caroni River, 

 Broadway 1626), and Tobago (The Whim, Broadway 3100). 



58. ORYaA L. 



Spikelets perfect, paniculate, laterally compressed ; glumes minute ; lemma 

 and palea subindurate, papillose-roughened, the lemma awned (the awn some- 

 times obsolete). 



1. Oryza latifolia Desv. Journ. de Bot. Desv. 1: 77. 1813. 



Or.yza sativa var. latifolia Doell in Mart. Fl. Bras. 2": 7. 1871. 



A rather robust perennial, the simple culms 2 meters or more tall, with thin 

 flat scabrous blades commonly 50 to 60 cm. long and 4 to 5 cm. wide, and large 

 many-flowered panicles, the short-awned spikelets short-pediceled along the 

 upper half to two-thirds of the long slender ascending branches. 



Swamps and ditches. Central America and West Indies to Brazil. Type 

 locality given as Carolina and Porto Rico, the first clearly an error. The a\^ 

 is described by Desvaux as being " brevissima." Later Hamilton ^ described the 

 species from a specimen in Desvaux's herbarium without mentioning the awn. 

 The habitat is here given as " in parte Hispanica Hispaniolae." 



Haiti (Bayeux), Porto Rico (Mayaguez), and Trinidad (St. Joseph, Cedros). 



Oryza sativa L. Sp. PI. 333. 1753. Cultivated sipK. Areoz. This plant is 

 cultivated throughout the West Indies and is occasionally found growing 

 spontaneously in fields and ditches. 



59. HOMALOCENCHRUS Mieg. 



Spikelets awnless, the glumes wanting, otlierwise as In Oryza, the plants 

 and spikelets much smaller. 



* Fl. Brit. W. Ind. 535. 1864. * Prodr. PI. Ind. Occ. 7. 1825. 



