lxxiv INTRODUCTION. 
One ovary with 3 distinct styles or stigmas ; : -  . 164 
Three distinct ovaries . ohne -  . SCHEUCHZERIA (p. 431.) 
Flowers minute, unisexual, in a globular head ERrIocavxon (p. 474.) 
163< Flowers complete, distinct, or clustered, or panicled. 
JUNCACEE (p. 467.) 
164 Three short styles : A ; ; : TOFIELDIA (p. 466.) 
Three sessile stigmas . ; : : . TRIGLOCHIN (p. 432.) 
[Shea with a single scale under each set of stamens and pistil, 
165. 
: [ose style with 2 or 3 linear stigmas . , : . , 163 
162 
Sheath of the leaves closed round the stem. CYPERACEH (p. 475.) 
Flowers enclosed in two or more scales. Sheath of the leaves — 
usually split open on the side opposite the blade. 
GRAMINEZ (p. 501.) 
ig¢ 4 Fruit a berry. Leaves usually broad . : . AROIDES (p. 419.) 
fruit a dry nut. Leaves linear and sedge-like . TYPHACEZ (p. 418.) 
II. CRYPTOGAMS. (No Stamens or Pistil.) 
Plants with distinct roots and stems or rootstocks, with leaves or 
green branches é : : ; : : ‘ ese 
Plants variously shaped, without distinct roots, stems, and leaves, 
seldom green unless aquatic . CELLULAR CRYPTOGAMS (p. 544.) 
Fructification in terminal spikes . : ; ; . ohn te 
Fructification radical or in the axils of small leaves. . ; Wage: 
Fructification on the back of the leaves or leaf-like branches. 
FILICES (p. 552.) 
Fructification on the whorled leaves. Aquatic plant. ? 
CHARA (p. 544.) 
Stems leafless, jointed, simple, or with whorled branches. 
2 
EQUISETUM (p. 549.) 
Stems bearing numerous small leaves. Spores of one kind. 
LycoPpoDIUM (p. 545.) 
Stems bearing numerous small leaves. Spores of two kinds. 
SELAGINELLA (p. 547.) 
Stem bearing a simple or branched leaf below the spike. 
 ‘FILICES (p. naa 
5) 
SSpore-cases sessile : ; : : : : 
\ Spore-cases stalked ; ‘ : : ‘ mee ph 5G 
Spore-cases small, in the axils of small leaves or bracts. 
Lycopopium (p. 545.) 
5 Spore-cases in the enlarged base of linear submerged leaves. 
ISOETES (p. 547.) 
Spore-cases (or involucres) globular on the rootstock at the base 
of linear leaf-like fronds . : ; . PILULARIA (p. 548.) 
| Spore-cases globular or urn-shaped, opening with a lid. } 
MossEs (p. 544.) 
| Spore-cases opening in valves 5 : HEPATICH (p. 5495.) 
