Nymphaeaceae - Water-Lily Family (18)go to check list index

Cabombaceae - Water-shield Family (19) go to check list index
     HBrasenia
         B. schreberi  Gmel. - water-shield

Ceratophyllaceae - Hornwort Family (20) go to check list index
     HCeratophyllum  - hornworts
         C. demersum  L.

Ranunculaceae - Buttercup Family (21) go to check list index
     HAconitum  - monkshoods
         A. napellus  L. - monkshood, introduced
     HClematis
         C. virginiana  L. - virgin's-bower, devil's-darning-needle
     HRanunculus  - buttercups or crowfoots
         R. aquatilis  L. - white water-crowfoot
         R. cymbalaria  Pursh - seashore buttercup
         R. flammula  L. - creeping spearwort
         R. gmelinii  DC var. hookeri  (D. Don) Benson - yellow water-crowfoot
         R. abortivus  L. var. acrolasius Fern. - kidney-leaf buttercup
         R. acris  L. - common buttercup
         R. pensylvanicus  L.f. - bristly crowfoot
         R. repens  L. - creeping buttercup, introduced
     HCaltha
         C. palustris L. - marsh marigold
      HCoptis
         C. trifolia  (L.) Salisb. - gold-thread
     HThalictrum  - meadow-rues
         T. venulosum Trelease - northern meadow-rue
         T. pubescens  Pursh - meadow rue, king-of-the-meadow
     HAquilegia  - columbines
         A. vulgaris  L. - garden columbine, introduced
     HActaea  - baneberries
         A. rubra  (Ait.) Willd. - red baneberry
         A. alba  (L.) Miller - white baneberry, doll's eyes

Berberidaceae - Barberry Family (22) go to check list index
     WBerberis  - barberries
         B. thunbergii DC. - Japanese barberry
         B. vulgaria  L. - European barberry, introduced
     HCaulophyllum
         C. thalictroides (L.) Michx. - blue cohosh

Papaveraceae - Poppy Family (23) go to check list index
     HSanguinaria
         S. canadensis L. - bloodroot
     HChelidonium
         C. majus  L. - celandine, swallow-wort, introduced

Fumariaceae (24) go to check list index
     HDicentra
         D. cucullaria  (L.) Bernh. - Dutchman's-breeches
     HCorydalis  - corydalis
         C. sempervirens  L(L.) Pers. - pink corydalis
     AFumaria  - fumitory, earth-smoke
         F. officinalis  L. - common fumitory, introduced

Hamamelidaceae - Witch-hazel Family (25) go to check list index
     WHamamelis  - witch-hazel
         H. virginiana  L. - witch-hazel

Ulmaceae - Elm Family (26) go to check list index
     WUlmus  - elms
         U. americana  L. - American elm, white elm
         U. glabra   Huds. - Scotch elm, introduced
         U. pumila   L. - Siberian or Chinese elm, introduced

Cannabaceae - Hemp Family (27) go to check list index
      HHumulus
         H. lupulus  L. - hops, introduced

Urticaceae - Nettle Family (28) go to check list index
      HUrtica
         U. dioica  L. - stinging nettle, introduced
         U. gracilis  Ait. - stinging nettle (sometimes treated as subspecies U. dioica dioica
                                                                                                          U. dioica gracilis)

Juglandaceae - Walnut and Hickory Familygo to check list index
       [WJuglans cinerea  L. - butternut]

Myricaceae - Bayberry Family (29) go to check list index
     WComptonia
         C. peregrina  (L.) Coult. - sweet fern
     WMyrica
         M. gale  L. var. subglabra  (Chev.) Fern. - sweet gale
         M. pensylvanica  Mirbel - bayberry

Fagaceae - Beech Family (30) go to check list index
     WFagus  - beeches
         F. grandifolia  Ehrh. - American beech
     WQuercus  - oaks
         Q. robur  L. - English oak, introduced
         Q. rubra    L. - red oak

Betulaceae - Birch Family (31) go to check list index
     WCorylus  - hazels
         C. cornuta  Marshall - beaked hazel
     WOstrya  - hop-hornbeams
         O. virginiana  (Miller) K.Koch - ironwood, hop-hornbeam
     WBetula  - birches
         B. allegheniensis  Britt. - yellow birch
         B. populifolia  Marshall - grey or wire birch
         B. pendula  Roth - weeping, cut-leaf birch
         B. papyrifera  Marshall - white, paper or canoe birch
         B. pubescens  Ehrh. - old world counterpart of white birch - introduced
         B. cordifolia  Regel - canoe birch
         B. pumila  L. - bog birch
         [B. X caerulea-grandisBlanch. (= B. cordifolia x  B.populifolia) - blue birch]
     WAlnus  - alders
         A. viridis  (Villars) Lam. - downy alder
         A. incana  (L) Moench. - speckled alder

Chenopodiaceae - Saltwort (Goosefoot) Family (32) go to check list index
      ASalsola  - saltworts
         S. kali  L. - common saltwort
      ASalicornia - glassworts
         S. europaea  L. - glasswort, samphire
     AAtriplex - orachs
         A. laciniata  L.
         A. patula  L. - spreading orach
         A. hastata  L.
         A. glabriuscula  Edmondston
         A. prostrata  Boucher
         A. subspicata  (Nutt.) Rydb.
      AChenopodium  - pigweeds
         C. album  L. - lamb's-quarters
         C. rubrum  L. - coast blight
         C. glaucum  L. - oak-leaved goosefoot
         C. leptophyllum  Nutt. - may be introduced with western grain
      AKochia
         K. scoparia  (L.) Schrader - summer cypress
     ASuaeda  - sea-blites
         S. maritima  (L.) Dumort. - sea-blite
         S. calceoliforomis  (Hook.) Moq.

Amaranthaceae - Amaranth Family (33) go to check list index
     AAmaranthus
         A. retroflexus  L. - red-root pigweed, introduced