Lxxii 



(Male flowers in globular heads in a terminal raceme. Females 

 axillary, joined two together in a large prickly burr, with 

 incurved points XANTHIUM (p. 235). 

 Flowers, male and female, distinct, or in heads, not prickly . 134 



,,./ Male perianth of 4 parts 135 



\Maleperianthof5or8parts . . CHENOPODIACE^E (p. 870). 

 I Leaves all radical, linear and fleshy, or transparent. Marsh 



185-! or water plants 136 



(Stems leafy. Leaves flat . . . . URTlCACB-i! (p. 398). 

 /Male flowers one or two on a stalk, with very long stamens. 



136 J Females sessile LlTTORELLA (p. 867). 



I Male and female flowers minute, mixed together in a small 



V terminal head KRIOCAULON (p. 476). 



,o 7 / Leaves opposite, sin? pie .... MERCURIALIS (p. 395). 

 '\Leavesalternate, pinnate . . . . POTKRIUM (p. 141). 

 Leaves alternate, with sheathing stipules. Stamens 6. Nut 



enclosed in the calyx RUMEX (p. 379). 



Leaves small and fine, in tufts. Stamens 6. Fruit a berry 



ASPARAGUS (p. 469). 

 Leaves small and heath-like. Stamens 8. Fruit a berry 



EMPETRUM (p. 396). 



Leaves radical, long, arrow-shaped. Stamens and carpels 

 numerous. Aquatic plant . . . SAGITTARIA (p. 481). 



( Flowers all male (a male specimen \ 131 



y \Flowers all female (a female specimen) 140 



/"Perianth 6-cleft, the 3 inner segments larger. Styles 8, with 

 I short fringed stigmas. Leaves alternate or radical 



RUMEX (p. 879). 

 140-{ Perianth 2- or 4-cleft. Stigma single, sessile, tufted. Leaves 



opposite, stinging URTICA (p. 399). 



I Perianth 3-cleft. Styles 2, simple. Leaves opposite, not sting- 

 ^ ing MERCURIALIS (p. 395). 



8. Trees or Shrubs. 



/Leaves opposite 142 



41 \Leaves alternate or in tufts 145 



. ( Leaves divided, lobed or angular, deciduous . . . .143 



\Leavesentire.evergreen 144 



Leaves lobed or angular. Stamens about 8. Fruit with two 



diverging wings ACER (p. 96). 



Leaves pinnate. Stamens in pairs, collected in clusters. Fruit 



with one erect wing .... FRAXTNUS (p. 297). 

 Parasitical shrub with green dichot omous stems. Fruit a berry 



143 



144 



145 



VlSCUM (p. 204). 



Erect branching shrub with shining leaves. Fruit a few- 

 seeded capsule Buxus (p. 396). 



Male flowers in catkins, separated by scales only. Females 

 solitary or in clusters, or in catkins, usually different from 

 the males H 



Flowers hermaphrodite or diclinous, each with a distinct 

 perianth 147 



