ANALYTICAL KEY. 



45 



123-^ 



124 



125 



i: 



" Stem leafy. Stipules sheathing. Nut enclosed in three of the 



periauth-lobes Dock Qen. (p. 444.) 



Leaves linear, mostly radical. Capsule with 3 or more seeds . .157 

 'Stamens and pistils in distinct globular or cyhndrical masses -with- 

 out separate perianths 162 



Stamens about 12, with one pistil in a calyx-Kke involucre. 



Spuege Gen. (p. 456.) 

 Flowers, male or female, each with a distinct perianth .... 125 



"Stems long and climbing 126 



Stems parasitical on trees, with hard green forked branches. 



Mistletoe Qen. (p. 266.) 

 Stems teiTestrial or aquatic, but neither ch'mbing nor floating . 128 

 f Leaves opposite. Capsules in a head concealed by leafy bracts. 

 126 1 Hop c;e«. (p. 466.) 

 (^ Leaves alternate. Berries red • 127 



{Leaves angular or lobed. Stem climbing by tendrils. Perianth 

 5-lobed Bexonx Oen. {^. 215.) 

 Leaves entire, shining. Stem twining, without tendrils. Perianth 

 64obed Tajitjs Gen. (p. 521.) 



rFlowers glumaceous, consisting of chafiy scales enclosing the 



^„„J stamens 161 



I Flowers of both sorts, or at least the males, with a distinct peri- 



(_ anth, of 3, 4, or more divisions 129 



.„„ J" Male perianth of 3 to 5 divisions 130 



■"■^^ 1 Male perianth of 6 divisions 136 



. J Stamens as many as the divisions of the perianth 131 



L Stamens indefinite 135 



Male flowers iu globular heads in a terminal raceme. Females 

 axillary, joined two together in a large prickly bm-r, with in- 

 curved points BuEWOOD Gen. (p. 310.) 



Flowers, male and female, distinct, or in heads, not prickly . . 132 



- J Male perianth of 4 parts 133 



^^^ \ Male perianth of 5 or 3 parts .... Goosefoot Fam. (p. 435.) 

 Leaves all radical, hnear and fleshy, or transparent. Marsh or 



water plants 134 



Stems leafy. Leaves flat Nettxe Fam. (p. 464.) 



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

 males sessile Littoeel Gen. (p. 434.) 



Male and female flowers minute, mixed together in a small tei-mi- 



nal head Eeiocaflon Gen. (p. 542.) 



Leaves opposite, simple Meecuex Gen. (jj. 460.) 



Leaves alternate, pinnate Poteeitjsi Gen. Qd. 197.) 



Leaves alternate, with sheathing stipules. Stamens 6. Nut en- 

 closed in the calyx Dock Gen. (p. 444.) 



Leaves smaU and fine, ui tufts. Stamens 6. Fruit a berry. 



ASPAEAGITS Gen. (p. 524.) 

 1 Leaves small and heath- hke. Stamens 3. Fruit a berry. 

 I Ceowbeeey Gen. (p. 462.) 



I Leaves radical, long, aiTOw- shaped. Stamens and carpels nimie- 

 [_ rous. Aquatic plant Aeeowhead Gen. (p. 495.) 



3. Trees or Shrubs. 



.. „„ r Leaves opposite 138 



1 Leaves alternate or in tufls 141 



131 



133 



134 <^ 



135 



