lxxiv INTRODUCTION. 
Perianth of 6 or 4 segments. Stamens as many or half as cone 162 
Flowers glumaceous, consisting of alternate chaffy scales, en- 
1614 closing the stamens and pistil in the same or separate scales 165 
Stamens and pistils in dense heads or spikes, without distinct 
perianths d iis . 166 
One style, with 2 or 8 linear stismas ; ; . ; . 163 
1624 One ovary, with 3 distinct styles or stigmas . : , . 164 
Three distinct ovaries f ; SCHEUCHZERIA (p. 429), 
Flowers minute, unisexual, ina elobular head ERIOCAULON (p. 476). 
163, Flowers complete, distinct, or clustered, or panicled 
JUNCACEZ (p. 468). 
164 Three short styles. ; : : . . TOFIELDIA (p. 468). 
Three sessile stigmas - . TRIGLOCHIN (p. 430). 
Flowers witha single scale under each set of stamens and pistil. 
| Sheath of the leaves closed round the stem CYPERACEZ (p. 477). 
1654 Flowers enclosed in 2 or more scales. Sheath of the leaves 
usually split open on the side opposite the blade 
GRAMINEZ (p. 501). 
166 Fruit a berry. Leaves usually broad ‘ . AROIDEZ (p. 420). 
Fruit adry nut. Leaves linear and sedge-like TYPHACE® (p. 418). 
II. CRYPTOGAMS. (No Stamens or Pistil.) = 
Plants with distinct roots and stems or rootstocks, with leaves 
or green branches . ; 2 
14 Plants variously shaped, without distinct roots, stems, and 
leaves, seldom green unless aquatic 
CELLULAR CRYPTOGAMS (p. 547). 
Fructification in terminal spikes : . 3 
Fructification radical or in the axils of small leaves . ; . 4 
Fructification on the back of the leaves or leaf-like branches ~ 
: FILICES (p. 554). 
Fructification on the whorled leaves. Aquatic plant 
CHARA (p. 547). 
: leafless, jointed, simple, or with whorled branches 
EQUISETUM (p. 551). 
Stems bearing numerous small leaves. Spores of one kind 
LYCOPODIUM (p. 547). 
Stems bearing numerous small leaves. Spores of two kinds 
SELAGINELLA (p. 549), 
Stem bearing a simple or branched leaf below the spike 
4 f Spore- cases sessile 
*) Spore- cases stalked . : é yes 
LYCOPODIUM (p. 547). 
Spore-cases in the enlarged base of linear submerged leaves 
ISOETES (p. 549), 
Spore-cases (or involucres) globular on the rootstock at the 
base of linear leaf-like fronds ‘ ; PILULARIA (p. 550). 
(gaa -cases globular or urn-shaped, opening with a lid 
MossEs (p. 547). 
Wee cases opening in valves . . .  HEPATICE (p. 547). 
E cases small, in the axils of small leaves or bracts 
FILICES 5 (p. 554). 
‘ie 
2) 
