lxviii INTEODUCTION. 



f Flowers dioecious. Male perianth of 2 or 6 scales 148 



147 < Flowers hermaphrodite or polygamous. Perianth regular, of 3 to 5 



L divisions 149 



f Erect shrub. Male perianth of 2 scales . . Hippophae Gen. (p. 723.) 



148 <[ Procumbent undershrub. Perianth of 6 scales. 



^ Crowberry Gen. (p. 738.) 



{Trees. Stamens opposite the lobes of the perianth. Fruit thin, like 

 a small leaf Elm Gen. (p. 745.) 

 Evergreen climber. Fruit a berry Ivy Gen. (p. 373 ) 

 Shrubs. Fruit a berry 150 



-irnj Flowers on the under side of the leaves . . . Buscus Gen. (p. 850.) 

 \ Flowers on the stem or branches 151 



i Flowers very small, green and open. Stamens 4 or 5 alternating 

 with the lobes of the perianth . . . Buckthorn Gen. (p. 178.) 

 Flowers with a conspicuous tube, often coloured. Stamens 8. 

 Daphne Gen. (p. 722.) 



152 



Monocotyledons. 



C Perianth, or at least the inner segments, coloured and looking like a 



corolla, or, if green, soft and yellowish 153 



Perianth dry, green or brown, or reduced to mere scales, or none at 

 L all 159 



{One or two anthers sessile on a central column or style. One of 

 the six divisions of the perianth different from the others. 

 Orchid Fam. (p. 803.) 

 Thr3e or more distinct stamens 154 



( Ovaries several, quite distinct, or if cohering, each with a distinct 



154 <J style or stigma Alisma Fam. (p. 793.) 



I^Ovary single, 3-celled 155 



1 -k J Ovary inferior 156 



\ Ovary superior Lily Fam. (p. 842.) 



-iKn\ Floating or submerged plants .... Hydrocharis Fam. (p. 801.) 



\ Terrestrial or marsh plants 157 



.. g,_ f Stamens 3 Iris Fam. (p. 831.) 



[ Stamens 6 158 



-ikq J Climbing plant with alternate net-veined leaves. Tamus Gen. (p. 841.) 



\ Bulbous herbs Amaryllis Fam, (p. 837.) 



f Floating or submerged plants 86 



159 ^ Terrestrial plants, or, if aquatic, erect from the bottom of the water 



L and projecting above it 160 



r Leaves in a single whorl of 4 or 5, with netted veins. Perianth seg- 



160 s ments, and stamens, 8 or 10 Paris Gen. (p. 844.) 



I Leaves radical or alternate, linear or cylindrical, with parallel veins 161 

 f Perianth of 6 or 4 segments. Stamens as many or half as many . . 162 

 | Flowers glumaceous, consisting of alternate chaffy scales, enclosing 



161 -{ the stamens and pistil in the same or distinct scales 165 



Stamens and pistils in dense heads or spikes, without distinct pe- 

 rianths 166 



""One style with 2 or 3 linear stigmas 163 



162 <[ One ovary with 3 distinct styles or stigmas 164 



L Three distinct ovaries Scheuchzeria Gen. (p. 798.) 



""Flowers minute, unisexual, in a globular head. 



163 J Eriocaulon Gen. (p. 883.) 



] Flowers complete, distinct, or clustered, or panicled. 



Rush Fam. (p. 869.) 



