294 North American Cyperacedi 



Tribe III. SCIRPE^. 



Flowers perfect. Scales of the spike imbricated on all 

 sides (rarely bi-trifarious). Perigynium composed of several 

 bristles, hairs, or linear scales, (sometimes cyathiform and mem- 

 branaceous) or wanting. 



A. Scales of the spike hi-trifarious4 



7. ABILDGAARDIA, VahL 



Spikes with the scales bifariously imbricated, (by the torsion 

 of the rachis trifarious, N. ah E.) Perigynium 0. Style 

 3-cleft, the base bulbous and articulated to the triquetrous nut. 

 — Culm angular, leafy at the base ; spikes solitary, clustered, 

 or umbellate. 



Abildgaardia, Vahlj emim. 2. p. 296; R. Brown, prodr. 1. p. 

 229 ; Lestibt esSi fam. Cyp. p. 32, no. 26 ; iV. ah Esenh. in 

 Wight's contrih. p. 70, ^in Linnaa. 9. p. 289. 



Species of Cyperus, Linn., Kunth. 



Cyperus "^. Iria, Rich, in Pers. syn. 1. p. 65. 



Abildgaardia cyperoides, N. ah E. ^ Meyen. 



" Culm triquetrous, sulcate on one side ; leaves linear, ob- 

 tuse, scabrous On the margin ; umbel somewhat decorapound^ 

 the rays pubescent ; involucre and involucels shorter than the 

 common and partial umbels; spikelets somewhat 2-flowered." 



A. cyperoides, N. ah E. Sf Meyen in Acad. Nat. Cur. 16. supp. (fide 

 JV. ah E. in Wight's contrih. p. 95.) 



Gussonea cyperoides, Presl. in rel. Haenk. 3. p. 183, t. 33, (fide N. 

 ah E. 



Hab. Monte Rey in California, HcenJce.^ 



Obs. This species has not come under my observation. 

 It is said by Nees to be allied to his A. Eragrostis, Sf A./usca, 

 described in Wight's Contributions, 1. c. 



