Characeae. 33 



Hab. in Cuba 1865: C. Wright n. 3920, in stagnis Las Tunas ad 

 Puerto Principe: C. Wright; Portorico, prope Fajardo in flumine ad 

 montes versus, 21. April 1885: P. Siutenisn. 1059 pro parte; Martinique 

 ad Port do France, 1860: Jardin (Hb. Lenormand); Trinidad, Perseve- 

 rance Estate ad Cedi'os, Jan. 1895: T. B. Blow. 



Distributio: Asia: India, Ceylon, Straits Settlements, Japonia, 

 Philippinae, Moluccae, Java. Africa: Sudan, Mauritius, Bourbon. 

 America sept: Illinois, Pennsylvania, New York, S.Carolina, Texas; 

 America centr.: Panama; America austr.: Brasilia. 



The West Indian form of this variable and widely distributed species 

 comes linder Braun's variety suhglomerata ^ which is characterised by the 

 aggregated fruits and by the lütimate rays of the branchlets not being much 

 abbreviated. 



4. Nitella Grollmeriaiia A. Braun in Monatsb. Berl. Akad. 1858 

 p.355 et Fragmente (1882) t. 1 f. 27—29. 



Statura paulo minor. Caulis tenuisculus. Ramuli verticillorum 

 pq. 8, semel furcati, sed propter radios secuudarios pq. brevissimos 

 vulgo per speoiem simplices. Radii secundarii unicellulares, paene a 

 basi fastigiati, acuti. Verticilli fertiles super ramis brevibus siti, 

 ramulis pq. brevissimis capitula densa nonnunquam interrupta et spici- 

 formia conformantes. Antheridia diametro -24 — 32 mm. Oogonia 

 solitaria vel geminata. Oospora brunnea multo complanata, -24 — 

 •3 mm. longa, -22 — 27 mm. lata, 6 — 7 liras exhibens, membrana tenui 

 prominentiis parvis sed magnitudine inaequalibus conspersa. Monoica. 



Hab. in Jamaica prope Chaiiton, alt. 1000 ft, 24. Nov. 1896: 

 W. Harris n. 6706 pro parte; Haiti in Petite Riviere d'Artibonite, Jul. 

 1897: L. Picarda n. 1656 (Hb. Krug et Urban). 



Distributio: America austr.: Venezuela. 



Closely allied to N. acuminata, of which it should perhaps be regarded 

 as a subspecies. The Jamaican plant is a small and slender form and the 

 minimum measurements given above apply to it. Picaeda's plant from Haiti 

 has the secondary rays of the sterile branchlets somewhat elongated. 



5. Nitella clavata Kuetz. Spec. Alg. (1849) p. 518, Tab. Pliijc. 

 VII (1857) t.81 f.l; L raun Fragmente (1882) p. 42 i.If.33—4 (rar. 

 in f lata) ; Speggaxiiii Characeae Flatenses (1893) p. 3; Allen Cliarac. 

 Americ. pari II fasc. II (1894) p. 12 et tab. 



Statura mediocris vel nana. Caulis crassus. Ramuli verticillorum 

 inter se dissimiles, primarii (fertiles) 6 — 8 semel furcati, radiis secun- 

 dariis 3 — 5 unicellularibus, secundarii (steriles) breviores simplices 

 unicellulares, infra primarios et eisdem alternantes sed pq. pauciores. 

 Radii omnes secundarii praesertim valde crassi, secundarii interdum 

 paene globosi, acuminati vel muci'onati. Antlieridiiim diametro -3 — 



Urban, Symb. aiit. VU. 3 



