EQUISETUM. 
517 
J. capillare (Milde) ; sterile st. with many long slender 
branches of about equal length, branchlets very fine threadlike, 
emerald green, 2 — 3 ft. high. — Wet shady places. P. IV. V. 
E. S. I. 
*** Stems of one kind, ivith or without simjde hollow whorled 
hrmvches. 
5. E. limosum (L. em., Koch) ; stem nearly smooth with 
many slight furrows, teeth of sheaths short rigid acute, 
branches simj^le whorled or none. — St. 2 — 4 ft. high. Sheaths 
rather short. Spike blunt. — a. E. limosum (L.) ; st. smooth, 
barren st. narrowing gradually upwards, branches short rigid 
slightly tapering upright and equalling st.-joints from green 
sheaths often wanting. FI. F. 62. — p. E. fluviatile (L. em., 
Wahl.) : st. subglabrous, barren st. with a lax whiplike end, 
branches long slender tapering lax exceeding st.-joints from 
dark brown sheaths rarely wanting. — [e. a«ornj«(Kuhi.), with barren 
and fertile st. similar, st. more deeply grooved and rougher, and with a smaller 
central hollow than sp. 5, spores abortive, elaters 0, found at Bisley, Surrey, by 
Mr W. H. Be.eby, is usually considered a hybrid betw. sp. 1 & 5. See J. of B. ixv. 
(1S87), p. 65, t. 273.] — In Stagnant water. P. VI. VII. E. S. I. 
6. E. jmlus'tre (L.) ; st. with 4 — 8 deej) furrotvs branched 
throughout, sheaths loose pale with acute wedgeshaped teeth 
tipped with brown and membranous at the edges, branches 
simple.—^. B. 2021. H. F. 63. S. 6. N. 43, 47 & 49.— St. 
slightly rough. Barren st. whipshaped at the end. Spike 
blunt. Sheaths coloured like the st. or paler ; teeth brown 
with nearly transparent edges, ribs furrowed on the back. 
Branches usually barren or (/3. polystachinm) each ending in a 
spike, hollow, with shallo ' furrows, lowest joint of branch (often 
reduced to its sheath) falling short of the st.-sheath. Occasion- 
ally (7. nudum DC.) the angles and teeth are fewer and the st. 
nearly or quite simple and dwarf. — Spongy bogs. 7- Sandy 
places. P. VI. VII. E. S. I. 
7. E. hyemdle (L.) ; st. simple very rough with 14 — 20 slender 
furrows, sheaths close whitish but the top and bottom black, teeth 
with slender black-brown very deciduous tips. — E. B. 915. 
H. F. 64. .S". 8. N. 17.— St. i— 2 ft. high, simple, biennial, 
its central hollow equalling at least f of diameter. Spike api- 
culate. Sheaths widest at their top, at first green with black 
crenate rim after the teeth have fallen, then entirely black, and 
ultimately pale in the middle and black above and below.— 
p. E. Mooo-ei (Newm.) ; st. annual very rough with about 12 
furrows, sheaths loose white with the base black, teeth black- 
