t82 



HALORAf^K/l', 



elongated erect spike ; I'/ar/s pinnatifid, longer than the flowers, 

 the upper ones without flowers in their axils. — Stagnant water ; 

 not common. The whole plant is submerged with the exception 

 of the spikes of inconspicuous flowers, which rise a few inches 

 above the surface.— Fl. July, August. Perennial. 



2. J/, spiaitiiin (Spiked \Vater Milfoil)., — Avery similar plant, 

 with kav<:s 4 in a whorl and very sQiall hrciits, of which only the 

 lower are pinnate, so that the whorls of flpivers form a slender, 



:iOfHVLLi:M spic.(tl-:ii {S/'ikca )l^^icr Milfoil'). 



erect, and apparently leafless spike. — More common than the 

 preceding. — Fl. June — August. Perennial. 



3. Af. aUcrmfloriim (Alternate-flowered Water Milfoil). — 

 Another similar plant, but more slender ; Icai'cs 3 or 4 in a 

 whorl ; brads at the base of the spike in whorls of 3 or 4, pinnate, 

 longer than the axillary pistillate //(/zftv.v ; ihose higher up opposite 

 or alternate, entire or serrate, shorter than the staminate tlowers, 

 which thus appear to form a leafless spike which is nodding 

 when in bud. The most freiiuent species. - Fl. May - August. 

 I'crcnnial. 



