FHESHWATER HTDROCHAUTDEiE OF ArEICA. 237 



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similis sed tubus perianthii longe exsertus, 2| uncias supra 

 spatliam ; sepala viridia chartacea ligulata obtusa, ^ unciam longa ; 

 petala alba, angiistissima linearia filiformia, § unciam longa ; styli 

 validuli complanati tres, petalis subaequalibus ; fructus carnosus 

 longe cylindraceus. 



Huilla. IFrequens et gregaria in rivulo Lopollo imprimis ad 

 Catarractam, rarius florens. Fructua immaturi cum floribus initio 

 Mail 18G0, Welicitsch, Herb. Brit. Mus. 



This species is easily distinguished from J5. RoxbnrgliU by its 

 creeping stem, which throws up distant solitary leaves sheathing 

 at the base. At intervals the leaves appear to become crowded 

 and the flowers are then produced. The female scape is usually 

 shorter than the male. The spathes of each are similar and re- 

 semble in form those of the other species ; but in the female flower 

 the perianth has a long tube projecting for two inches beyond the 

 spathe, while the perianth-tube in the male is no longer than the 

 spathe. The sepals in the male flower are thin and transparent, 

 while in the female they are thicker and opaque. The petals in 

 both are thin and white, and in the female exceedingly narrow 

 and filiform. The stamens are similar to those of the other species, 

 only narrower and acuminate. The pollen- grains are globular 

 and covered with short processes. 



Stkatiote^. 

 Ottelia. 



O. ALISMOTDES, Pers. Syn. PI. i. p. 400. — Nubia, Egypt, Sir 

 Gardner Wilkinson !, Delisle ! ; TJah-el-Behariah, Asclierson 

 {(Esterr. Pot. Zeit. 1876) ; El Aguri, Lybian Desert, Ascherson \ ; 

 Damietta, Bromjield ! ; Cordofan, Kotscliy ! 



This is the most widely spread species in the genus, occurring 

 also in India, Borneo ( GrahowsJcy), Timor (i2. Broicn)y Philippines 

 {Cuming\ Java {Sorsfield)^ China, and Japan. 



O. YESicFLATA, n. sp. Acaulis ; folia lanceolata longe petiolata, 



lamina 3-4 uncias longa | unciam lata, petioli 3-unciales; scapi 

 3-15-unciales, compressiusculi,breviter bialati, paullo infraspatham 



sensim incrassati, compresse tetragoni angulis lateralibus acute 

 alatis ; spatha vesiculatim inflata compresse lato-ovoidea extus 

 purpureo-vittata, ore bidentato demum lacero, unciam longa, f 

 unciam lata (in sicca) ; sepala lanceolata subacuta §-uncialia ; 

 petala lutea | unciam longa; stamina 6; styli 7 {Jtde fVelw,); 

 ovarium incomplete 9-loculare. 



