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40 FLORA OF WASHINGTON AND VICINITY. Series, Classes, and Divisions. Pol.\-petalaB Gamopetalae Total Dichlamydea) . Monochlamydese Total Dicotyledons . . Monocotyledons Gymnospermse (ConiferiB) Total Phfenogamia Cryptogamia . Total "Vascular Plants Number of orders. Essex County. 103 5 108 Plora Columbiana. 112 4 Number of genera. Essex County. 155 158 313 44 357 120 7 484 20 Flora Columbiana. 174 169 343 47 390 112 4 506 21 527 Number of species and varieties. Essex County. 360 358 718 132 850 392 17 1,259 65 I Flora Columbiana. I 356 389 745 124 869 331 7 1,207 42 1,324 1,249 The 16 large orders enumerated on page 35 may also be compared with profit : 1 Compositaj 2 Gramineas Cyperaceae ' 4 Leguminosae 5 Eosaceae 6 Labiatae 7 Cruciferae 8 Scrophulariaceae 9 Filices 10 Ranunculaceae .. 11 Ericaceae I 12 Cupuliferae ' 13 Orchidaceae 14 Liliaceae j 15 Polygonaceae I 16 UnibelliferaB I Orders. Number of genera. Essex County. 43 50 9 17 12 22 14 14 13 9 18 6 13 18 3 16 Flora Columbiana. Number of species and varieties. Essex County. 136 128 120 39 55 35 29 29 I 40 30 I 37 I 16 32 27 27 20 Flora Columbiana. In the flora of Essex County the orders Umhelliferce (20) and Ctipu- liferw (16) fall below the lowest of the 16 for the flora of Washington {Umhelliferce^ 22), while on the other hand the Caryopliyllacece (27)^ Salicacew (23), and Naiadacew (28), not in the list, rise above that number. These orders in the flora of Washington are represented respect- ively by 19, 19, and 9 species and varieties. With reference to the last named of these orders, however, it may be remarked that the genus Potamogeton, which constitutes the greater part of it, has been very im- perfectly studied here, and will certainly be largely increased when thoroughly known. The orders in which this flora falls below that of Essex County are: the Graminew^ Gyperacece, Bosacece, Filices, Rammculacea\ EricacecCy Liliacea\ Orchidacecv, and Polygonacecv, nine in all. In the remaining seven orders there is a greater number of species here than there. It is 149 110 108 57 46 42 33 32 30 27 26 26 24 24 23 22
FLORA OF WASHINGTON AND VICINITY. 41 noteworthy that our flora exceeds that of Essex County most in the Compositw, Leguniinoscc, and CupuliferWj and next to these in the Scroplm- lariacea', Labiatcv, and Cruc>fera\ Our comparatively poorest orders are the Cyperacem, Bosacew, Uricacecc, and Filices. Comparing in like manner the 15 large genera enumerated on page 35, we are able to see still more definitely wherein the two floras differ: 1 Carex 2 Aster 3 i Panicum 4 Solidago 5 Quercus I . 6 Polygonum . ' 7 Dcsmodium . i 8 Salix 9 Juncus 10 Viola i 11 Cyperus 12 Ranunculus. j 13 Eupatorium 14 Heiianthus.. 15 i Asclepias . . Genera. Number of species
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1. Clematis ochroleuca, Ait. 2. Cle
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150 43. Dicentra Cucullaria, DC. '4
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154 138. Sida spinosa, L. 139. Abut
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16fi 424. Solidago gigantea, Ait. 4
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17G FLORA OF WASHINGTON AND VICINIT
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186 894. Sagittaria variabilis, Eng
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^I^FEISTDIX:. SUGGESTIONS TO BEGINN
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FLORA OF WASHINGTON AND VICINITY. 2
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flora of washington and vicinity. 2
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\ FLOEA or WASHINGTON AND VICINITY.
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INDEX [Species are not indexed exce
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Balm 105 of Gilead 117 Balmony 101
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INDEX. 243 Page. Carex polyraorpha
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Coreopsis discoidea rosea verticill
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INDEX. 247 Page. Eleocharis paliist
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INDEX. 249 Page. Goldie's "Wood-Fem
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Introduced species, Number of, from
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INDEX. 253. Page. Magnolia Family 6
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INDEX. 255 Pago. Orchis FamDy 119 O
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INDEX. Page. Population in 1830 and
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INDEX 259 Page. Saltwort 107 Salvia
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INDEX. 261 Page. Staghorn Sumac 73
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Viburnum dentatum 49 nudum 49 pruni
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