432 



DODECANDRIA. MONOGYNIA. Ceratophyllum. 



demer'sum. C. Leaves forked, toothed; lower ones strap-shaped; up- 

 per ones much crowded, tubular and inflated, beaks 

 ' of the capsule of equal length. 



FL dan. 5\0-Loes. 12 at p. Gj-Faill. hist, de Vacad. vol. 



I 



for 1719./. 21. 



. Root striking deep in the mud. Stem much branched, the 

 lower part generally covered with mud. Leaves in whirls, 

 about 8 in a whirl, the lower whirls about half an inch distant, 

 but closer upwards, and extremely crowded towards the end ; 

 twice-forked, bristle-shaped, harsh and somewhat brittle, semi- 

 transparent, green, spotted with short purple lines, and the ex- 

 treme forks toothed on the outside only ; those on the part of 

 the stem covered with or lying in the mud, short, forked, much 

 thicker than those above, and appearing as if broken or bitten. 

 Flowers few, in the bosoms of the leaves. Seed-vessel with 1 



long thorn at the summit; and 2 shorter on opposite sides near 

 the base Mr. Woodward. 



Floating Homweed. Ditches and slow streams. P. Aug. Sept. 



submer'sum. C. Leaves forked, toothed ; lower ones tubular and some- 

 what inflated; upper ones hair-like, near together j 

 capsules with a short blunt point. 



m 



E. hot. 67S-JW/. hist, de Vacad, 2. 2, vol. for 171<). /. l6. 



So nearly allied to C. demersnm that it may prove to be only 

 a variety. Linn. Specimens from Paris had the leaves twin- 

 forked. I should not be inclined to consider it as a distinct 

 species. Hall. 



This species is certainly to be distinguished from the more 

 common C. demersnm by its fruit being unarmed, not furnished 

 with 3 long divaricating thorns. E. bot. 



Ditches on the side of the road from Chichester to the Isle of 

 Selsey. R. Sjn. [Near Yarmouth, Mr. Dawson Turner. E. 



bot.] 



Sept 



Sail 



LY'THRUM. Cat often with 12 or 1 6 teeth: 



petals 5 or 6, fixed to the calyx: capsule I 

 or 2 celled, many-seeded. 



ca'ria. L. Leaves opposite or alternate, heart-spear-shaped; 



flowers in spike, 10 or 12 stamens in each. 



Curt. 186-Knif>h. 5-/7. dan. 67\-Matth. y&Q-Clus* ii. 51* 

 \-Dod. 86. ]~Ger. em. 476. 5-Park. 546. l-Pet. 62. 6- 



Black 



<w. SWl-Gtr. 386. 2. 



Stem upright, square. Leaves spear-shaped, sitting, all op- 

 posite, or all alternate, or the lower ones opposite and the upper 



