SCIRPUS. 4^ 



Pedunculis 5 insequalilms, hine teretibus intle pla- 



nis, basi vagina truncata et folio lanceolato 



instructis vel involucro. 

 Spiculis peclicellorum ovatis 3 — 5 — 16 gloraeratis. 

 Cal. glumsB l valves imbricatse ovatse carinatsB sub. 



muronatse, carina viridi, brunnese. 

 Stam. 3, antheris rubris. 

 Pist. trifidum purpurascens. 

 Semen triquetrum album enervc; setis semine lon- 



gioribus. 

 Radix 



Habitat in aquosis, floret Sept. Penns. N. Caes. 

 Involucrum erectum 4-phyllum panicula longius. 



27. SCTRPUS ATROviRENS. Willd. Enum. 



Culmo trigono striato glabro tripedali foliato. 

 Foliis radicalibus lanceolatis carinatis longis^ culmi 



alternis lanceolatis carinatis scabris. 

 Vagina striata glabra transparente. 

 Panicula terminali prolifera involucrata. 

 Involucrum 3-phyllum, margine et carina sca- 



brum. 

 Ramis paniculse vel pedunculis insequalibus 3 — 6^ 



pedicellis 13. 

 Spiculis glomeratis pluribus (IS) ovatis acutis fus- 



cis. 

 Cal. glumae 1-valves imbricatse ovatse acutsefuscse 



carinatse pubescentes. 



