62 KEY TO NATURAL ORDERS 
Orper III—POLYGONALES—THE BucKWHEAT ORDER 
(Page 200) 
Our species, herbs, mostly in wet places. Flowers in general, regu- 
lar, the parts mostly in 8s. Ovary 1-celled, 1-seeded, the seed arising 
from the base of the ovary. Leaves alternate, subtended by a collaret 
or sheathing stipule, technically an ocred. 
bP ex 
: 56. 57s 58. 59. 60. 
54. Single joint and leaf of Polygonum. 55. Catkin of Polygonum. 56. Leaf of 
Buckwheat. 57. Spike of flowers of Dock. 58. Winged seed of Dock. : 
of Door Weed. 60. Spray of Bind Weed. ; : So Spray 
OrvER IV—CHENOPODIINEAE—Pic WEED ORDER 
(Page 210) 
Our species always herbs, mostly weeds in cultivated grounds, (The 
beet and spinach are valuable cultivated species.) Flowers always 
with the members equal, but these are generally very small and incon- 
spicuous, rarely colored and the corolla is nearly always absent. Ovary 
1-cellel, l-seeled. Leaves without stipules or collaret. 
64. 65. 66. 67. 68: 
64. Summit of Pig Weed. 65. Transverse section of seed of Pig Weed. 66, 
Flower of same. 67. Summit of Orache. 68. Seed of Orache. 69. Summit of 
Slender Glasswort. 70. Spray of Dondia, 71. Section of seed of same. 72. Flower 
of — Weed. 73. Flower of Pink. 74. Flower of Carpet Weed. 75. Flower of 
ychnis. 
70. 71. 72s 73+ 74) 75, 
OrDER V—PHYTOLACCINEAE—PokKE Root ORDER 
(Page 221) 
A single, rather coarse plant, in our area, with flowers in a long 
nearly cylindric cluster, Individual flowers regular, stamens as many 
or more than the parts of the calyx. Corolla wanting, the calyx white 
or colored. 
GROUP II—ORDERS OF POLYPETALOUS CHORIPETALAB 
In this group the flowers have, as a rule, both calyx and corolla fully 
developed, the corolla consisting of several petals distinct and separate 
from each other. Examples: Buttercup, Wild Rose, Poppy. In a few 
species in the Order Caryophyllineae, a few in the Order Ranales, and 
a very few in other Orders the petals are undeveloped, 
Orper I—PORTULACINEAE—OrDER OF PURSLANES 
(Page 223) 
Flowers with calyx and corolla, the former of 2 (or more) sepals, 
the latter of 4 or 5 (or more) petals, Stamens as many as the petals 
and opposite to them or sometimes more or less. Ovary of 1 cell with 
many ovules arising from the base. Fruit a capsule, opening as a lid 
