Characeae. 37 



Distributio (excl. subsp. Glaxiovii): Asia: Ceylon, Straits Settle- 

 ments, Java; America Sept.: Canada, Civit. unitae; America centr.: 

 Panama; America austr.: Gniana gall. et hoUand., Brasilia. 



Wkiüht's specimens from Cuba comprise three different forms, or states, 

 one an almost black dense-growing plant about tlie size of N. mucronata^ 

 a second mucli larger but quite young brownisli-green plant wliicli Nord- 

 STEDT has referred to JV. microcmya subsp. megacarjm , but upon whicb in 

 the absence of fruit we should prefer to reserve judgement. Both of these 

 are under no. 3919. The third form, under no. 3921 (in Company with 

 N. kmiissima) is a more distinct plant which we think may be described 

 as a variety, as follows: 



Var. Wrightii Groves (n. var.). Yerticilli heteromorphi, fertiles 

 nonnulli in capitulis parvis paene giobosis cougesti. Ramiili verticillorum 

 6 — S bis vel ter fiircati. Radii ad furcam primam 4 — 6, ad secundam 

 3 — 5, quorum 1 — 3 nonnunquam in radios er. 4 iterum furcati. Radii 

 Ultimi vix unquam abbreviati, cellula inferiore versus basin cellulae 

 ultimae paulatim angustata, cellula ultima elongata angusta acuta. 

 Antheridia et oogouia ad furcam primam et secundam, nonnunquam 

 tertiam, posita. Oogonia solitaria aut geminata. Coronula abbreviata. 

 Oospora er. -22— -25 mm. longa, -18 — ■2 mm. lata, -14 mm. crassa, 

 liras 6 exhibens. 



Hab. in Cuba: C. Wright a. 1865 n. 3921, pro parte. 



A smaU plant, with the ultimate rays tapering, resembling in outline 

 those of the most acuminate form of N.acuminaia, and hardly ever shortened. 



11. Nitella hyaliiia Agardh Syst. Älrj. (1824) jJ- 126. — Ohara 

 hyalina DC. Flor. Franf: V (1815) p. 247. — C. condensata et C. inter- 

 rupta Ruprecht Sijmb. Hisi. PI. Boss. (1845) p. 78, 79 (fiele Brami). 



Statura parviuscula. Internodia longitudinem ramulorum bis — 

 quater excedentes. Ramuli verticillorum inter se dissimiles, primarii 

 majores pq. 8, secuudarii minores er. 16, duobus ordinibus, quorum 

 alter supra alterum infra majores instructus. Ramuli primarii 2 — 3-plo 

 furcati, radiis primariis totam longitudinem ramulorum V-.~V.-. ^equan- 

 tibus. Radii ad furcam primam 7—10 (quorum 1 — 3 pq. simplices), 

 ad furcam secundam 4 — 7, quorum — 2 in radiis 4 — 5 deuuo fur- 

 cati. Radii ultimi 2-cellulares, cellula inferiore versus basin cellulae 

 ultimae sensim angustata, cellula ultima parva angusta acuta. Ramuli 

 secundarii quam primarii minores et minus furcati. Antheridia et 

 oogonia solitaria, ad furcas secundas et tertias (rarius primas) ramu- 

 lorum primariorum, nonnunquam quoque ad ramulos secundarios posita. 

 Antheridia diametro -25 — -41 mm. Coronula -075 mm. lata, -045 

 alta. Oospora cinereo-brunnea manifeste complanata, -25 — 4 mm. 

 longa, -21 — 32 mm. lata, 8 — 9 liras evidentes sed (apice excepto) 

 non prominentes exhibens, niembrana leviter granulata. Mouoica. 



199U61 



