9

9
(Ioxylon pomiferum)
(c) Elm Family (Ulmaceae) (165) Thick-leaved
Elm (Ulmus crassifolia) (166) Winged Elm or Wahoo
(U. alata). (167) American Elm (U. americana)
(168) Southern Hackberry (Celtis mississippiensis)
XVIII. Buckwheat Order (Polygonales)
(a) Buckwheat Family (Polygonaceae) (169) Long-
leaved Eriogonum (Eriogonum longifolium) (170) Annual
Erigonum (E. annuum) (171) Many-flowered Eriogonum
(E. multiflorum). (172) Engelmann's Sorrel (Rumex hastatu-
lus (173) Curled Dock (R. crispus) (174) Broad-leaved
Dock (R. obtusifolius) (175) Mexican Dock (R. mexica-
nus (176) Berlander's Dock (R. berlandieri) (177) Slender
Pink Persicaria (Persicaria incarnata). (178) Dock-leaved
Persicaria (P. lapathifolia) (179) Dotted or Water Smart-
weed (P. punctata) (180) Knot-grass or Door-weed (Polygonum
aviculare) (181) Virginia Knot-weed (Tovara virginiana)
(182) Black Bindweed (Tiniaria convolvulus)
XIX. Goosefoot Order (Chenopodiales)
(a) Goosefoot Family (Chenopodiaceae) (183) Lamb's
Quarters (Chenopodium album) (184) Narrow-leaved Goose-
foot (C. leptophyllum) (185) Bosc's Goosefoot (C. boscianum)