178 



TRUNDRIA biGYNlA. 



He 



Corolla bival 



\'is ; valvula exteriore co 

 riacea. Arista termina 



lis 



Stami/ia 



Semen i. 



Styl 



<s> 



Masc. Corolla uni s 



Herm. Corolla 2 valr- 

 ed ; the exterior valve 

 coriaceous. Awn ter- 



minal. Stamens z, Stijks 



2. Seed 1. 



Masc. Corolla l—i 



bivalvis, aristata. Stam- ] valved, awned. Stamens 



ina 3, s. 0. 



3 or 0. 



4. Petrjea. 



C. 



spicis quaternis, 



Spikes 



fours,, digi. 



(5-6-nis), strictis, erectis 5 I tate, straight, erect; flo>>'. 

 flosculis imbrjcatis, sub- ers imbricate, glabrous, 

 glabris, niuticis ; valvula | unawned ; the exterior 

 exteriore calycis aristata ; I valve of the calyx awn- 



culm o compresso. 

 pi. 4. p. 924. 



Sp. 



ed 



3 



stem compressed 



Mich. 1. p. 58. Pursh, 1. p. 87, 



Jloot perennial. 



Stem prostrate, branching, taking root at tJie 



Leaves about 3 inches 



Joints, geniculate, compressed, ascending. 



Howered, hermaphrodite and neuter; exterior valve obo- 

 ;inate, awned with a scabrous midrib; interior smaller, 



long, obtuse, glabrous, somewhat glaucous, slightly channelled, vitt 

 the margins and keel serrulate ; sheaths longer tlian the joints, coa- 

 pressed, with the back serrulate, contracted at the throat. Cfl/j/A'^ 

 valved, 2 



vate, cmarginate, ^ 



keeled, verj acute. Corolla of the hermaphrodite flower 2 valved, 

 much larger than the calyx ; the exterior valve concave, rigid, carti- 

 laginous, daik brown, ciliate along the margins, the midrib termina- 

 ting in a short awn ; the interior smaller, membranous, the mfV^ 

 refiexed, both slightly emarginate ; the neutral floret on a short thi» 

 pedicel, one valved, concave, obtuse, pale brown, nerved along «* 



margin. 



Grows in soils exposed to the influence of salt water. 

 Flowers June — Aug-ust, Sea-side Chlof^ 



4 



ROTTBOELLA. 



RacMs articulata, tere- I RacMs jointed, some 



tiuscula, ia pluribus fili- 



what 



terete, 



common 



formis. Calyx ovatclan- ly filiform. Calyx ovate 



