XXII 
pedium the 2 lateral ones fertile). Pollen grains cohering to¬ 
gether in 2—4 pollen-masses of definite form. Capsule. Pis 
often having tuberous roots. Cl. 20 (Gynandria). 
103. Hydrocharideae. FIs dioecious, enclosed, before the 
anthesis, in a spathe of 1 —2 valves. Perianth divisions 6, the 
3 outer ones herbaceous, the 3 inner ones petaloid. Fr. gen. 
berry-like.—Water pis. 
b) Perianth complete, gen. with 0 divisions (comp. 
Asparagacese), inferior. 
* Fr. consisting of several free or partly united carps, or a schi- 
zocarp. 
104. Alismacese. Divisions of the perianth 6, the 3 outer ones 
herbaceous, the 3 inner ones petaloid. Stas 6—many. Ovaries 
6—many, 1—2-ovuled. Seed exalbuminous. 
105. Butomaceae. Perianth as above. Stas 9. Ovaries 6 , 
many-ovuled. Seed exalbuminous. 
106. JuncagineSB. Perianth divisions similar, herbaceous or 
slightly coloured. Stas 6. Ovaries 3—6, 1—2-ovuled. Seed exal¬ 
buminous.—Ls linear, narrow. 
118. Colchicaceae (Melanthacese). Perianth divisions peta¬ 
loid (in Tofieldia slightly coloured). Stas 6. Ovaries 6, many- 
ovuled. Seed albuminous. 
* Ovary single, undivided. Capsule or berry.—Seed albuminous. 
117. Liliaceae. Perianth petaloid. Stas 6. Capsule.—Pis 
often having bulbs. 
115. Asparagacese (Smilacese). Perianth gen. petaloid. Stas 
6, rarely 4 or 8. Berry.—Pis with root-stocks. 
119. Juncaceae. Perianth glumaceous. Stas6or3. Capsule. 
—Resembling Cyperacese in habit but with a perianth and a 
capsular fruit. 
c) Perianth O or incomplete, formed of hairs or 
scales (in Acorus fairly complete). 
1. Pis preferring marshes or damp places. FIs drawn 
together on a fleshy axis {spadix), without glumaceous 
bracts. Root-stocfc tuberous or creeping. Fr. inde- 
hiscent. Seed albuminous. 
111. Aroideae. FIs unisexual or hermaphrodite on a spadix 
supported by a large bract or surrounded by a spathe. Fr. dry 
or berry-like.—Ls cordate or sagittate, in Acorus linear. 
110. Typhaceae. FIs unisexual, male and female in sepa¬ 
rate cylindrical or globular inflorescences. Fr. dry.—Ls linear, 
grass-like. 
