JUNCAGINE^. 225 



P. Jluitans. L. Leaves reddish, spadix an inch long ; upper 

 leaves floating. 



P. gramineum. Mx. Leaves narrow-lineai-, flat ; upper 

 vi?horled. 



P. natans. L. Leaves leathery, long-petioled, lower ones 

 linear-lanceolate. 



P. perfoliatum. L. Leaves clasping, ovate and cordate. 



Plants of little importance. The other four need not he de- 

 scribed ; they are P. heterophyllum, Shreb., lucens^ Mx., pcdi- 

 natum, L., and setaceunij Ph. 



ORDER 259. JUNCAGINEiE. 



Sepals and petals herbaceous, rarely absent ; stamens G ; ova- 

 ries 3 or 6, superior ; fruit dry, 1 or 2-seeded ; leaves ensiform, 

 with parallel veins ; flowers in spikes and racemes. 



The plants of this order are widely spread over the world, in 

 marshy places ; properties of no consequence. 



SCHEUCHZERIA. L. 6. 3. 



Perianth 6-parted ; ovaries 3-6 ; capsules compressed, inflated, 

 2-valved. From Scheuchzer, a German botanist. 



S. palustris. L. About a foot high, with leaves linear, some- 

 what 2-rowed, and sheathing ; flowers greenish-yellow, in a small 

 terminal raceme ; swamps; July. " Belchertown." 



Triglochin. L. 6. 3. 



From the Greek for three and pointy on account of the triangu- 

 lar capsule ; only a few species, widely diffused. 



Perianth double, 3-leafed each, the inner petal-like ; stamens 

 3 or 6 ; capsules 3 or 6, 1 -seeded. 



T. maritimum. L. Sea Arrow-grass. Grows about salt 

 marshes, with rush-hke leaves, smooth and roundish, with a sweet- 



29 



