CHARACEAE PLATENSES 231 



ribus (0,15-0,20 mllm. long, = 0,10 mllm. crass.) armati, in 

 juventute fasciculis regulariter 5-10-subverticillatim dispositis 

 per aetatem inordinate sparsis ac saepe deciduis. Folia 13-14 

 in quoque verticillo erecta v. subpatentia (praecipue in senec- 

 tute) recta v. arcuata, 12-articulata, articulo Ínfimo brevissimo 

 ac supremo mucroniformi, saepe 2-cellulari ecorticatis, ceteris 

 triplostiche corticatis; inferis longioribus (1-4 mllm. long.), 

 superis gradatim abbreviatis (1-2,5 mllm. long. rz 0,40-0,50 

 mllm, crass.), ad médium anulo incrassato-subpapilloso (an 

 geniculo abortivo?) saepius donatis. Corona stipularis conspicue 

 evoluta, dúplex, serie supera erecta, majore (0,50-0,60 mllm. 

 long. := 0,15 mllm. crass.), articulum infimum foliorum occul- 

 tante, serie infera, retrorsa, minore (0,30-0,40 mllm. long. = 

 0,15 mllm. crass.), cauli adpressa, stipulis ómnibus 1-cellulari- 

 bus, acutiusculis. Folióla saepius deficentia v. rudimentaria, 

 vix ad genicula 3-4 infera fructífera in latere interno 2- (ra- 

 rissime 4, et tándem 2 lateralia veré minima) evoluta, genitalia 

 aequantia v. superantia. Sporangia solitaria, sessilia, elliptica, 

 majuscula, coronula brevissima truncato-obtusata ornata, nu- 

 cleum ellipticum (0,65-0,70 mllm. long. rz 0,45-0,50 mllm. 

 diam.), griseo-virescentem v. virescenti-fuscum, levissime 9-10 

 gyrato, vittis parum perspicuis includentia. Antheridia glo- 

 bosa, in sicco contracto-polygona, majuscula (0,60-0,70 mllm. 

 diam.), succineo-rubra. 



Notabile, in speciminibus $ verticilli omnes sporangia tan- 

 tum gerentes, in <£ caulis verticilli 2-4 inferí sporangia abor- 

 tiva (an immatura?) tantum ornata, ceteris omnino antheridii- 

 feris. 



Specimina Bergiana sterilia, subecrustata, soidide pallideque 

 viridia, flaccida, caulibus crassioribus (1,2-1,4 millm. crass.), 

 validius gyratis, internodiis longioribus (1-5 cent, long.), papillis 

 parum manifestis v. plañe deficientibus (etiam in juventute); 

 corona stipulari submajore, folia crassiora, grossius geniculata, 

 geniculis in latere interno 4-foliolatis, foliolis longioribus 

 (0,50-1 mllm. long.) 



Ex Universitate Bonaérensi, 1 Maj. 1883. 



