PL end . cr. 
4. EQUISET. 22. Equisetum. 27 
6. Equisetum palustre . Marsh horsetail . 
(Stem branchy, furrowed, smoothish ; branches fivesided, 
simple, erect; spike terminal. 
E. palustre, Ger. em. 1114; Lin. S. P . 1516. 
E. palustre minus. Park. 1200. 
E. palustre, Raii Syn. 131, 9. 
Spongy bogs; perennial; June and July. 
Stem deep furrowed, branched in every part; branches 
erect, long, simple, minutely scabrous; sheaths greenish, 
the edges whitish ; spike terminating the stem, single, 
blackish, slender, formed of a few large, distant scales. 
j3. tenuissimum. Branches very long and slender. 
E. palustre, tenuissimis et longissimis setis, Raii Syn. 131, 6. 
y. polystachion. Upper branches , as 'well as the stem, 
terminating in a spike. 
E. palustre, minus, polystachion, Raii Syn , 131, 7. 
7. Equisetum sylvaticum. Wood horsetail . 
Stems doubly branched; branches rather rough, bowed 
<down, foursided ; second branches rather threesided. 
E. sylvaticum, Raii Syn. 1 30, 4 ; Ger. em. 1114 ; Lin. S. P. 1516. 
E. omnium minus tenuifoliura, Park. 1201. 
E. sylvaticum, Tabern. Ic. 253. 
Moist woods and banks of rivulets ; per. April and May. 
Boot creeping; stems erect, a foot high, very much 
branched, terminated by a single spike ; branches furrowed ; 
spike footstalked, upright, ovate, blunt, brown, tessulated. 
/3. procumbens. Branches pointing all one way. 
E. sylvaticum, procumbens, setis uno verso dispositis, Raii Syn. 131 , i. 
Fam. V. 5. CHARADEiE. 
Fructification monoicous, axillary; bractece 2, 3, or 4; 
perigoninm transparent, fivecut ; anther P sessile, single, 
globular, bursting in three or four parts ; pollen P conglo- 
merate with spiral threads ; nut barked, crowned, turbi- 
nate, sessile, spirally streaked, onecelled, many-seeded ; 
seeds very minute, spherical — Plants submersed, verticillate, 
fistulous, smooth pr covered with a corklike bark, very 
brittle when dry. 
23. CHARA. Vaillant. M.R.A. 1719. Slonewort . 
No other genus in this order. 
