E. atropurpureum l^'crii. t^c VViet^. ruriilc Crowl^erry. 



Open rocky places, gravelly patches and wet areas on upper slopes and near 

 summits of White Mountains ; most common on lower mountains, hut ascending to 

 alpine zone on Alt. Washington: Rhodora 15:214-215, 1913. 



Rhus typhina L. Staghorn-Sumac. 



Widely distributed and common at low elevations, becoming infrequent in Coos 

 County ; old fields, pastures, fence-rows, dry shallow soils, in rocky areas or in 

 gravels: forma lacijiiata (Wood) Rehd. described originally from New Hampshire, 

 with leaflets deeply and narrowly toothed is found occasionally throughout range in 

 New Hampshire, often appearing to he diseased: Wood, .\m. liot. Flor. pt. 4:73, 

 1870 and Rhodora 9:115, 1907. 



R. glabra L. Smooth Sumac. 



Widely distributed and often conmion at low elevations in southern New Hamp- 

 shire, becoming infrequent to rare northward to Colebrook ; similar habitats as fore- 

 going: forma laciiiiata (Carr. ) Robins, with leaves nearly or c|uite bipinnate was 

 once collected at Alcott Falls in Lebanon. 



var. borealis Britt. 



Probably a hybrid of A'', fyphiiia and /v. ijlahra : one collection from Jefferson. 



R. copallina L. var. latifolia Engler. Dwarf or Shining Sumac. 



Reaches northeastern limit of range in southern Maine and central New Hamp- 

 shire ; at low altitudes ; locally common in southern New Hampshire, extending north 

 to Madison and Plymouth ; rocky and gravelly slopes, open woods, and clearings. 



The following species, dift'ering from the foregoing Sumacs by having white 

 rather than red fruits and entire leaflets without winged petioles are extremely 

 poisonous in contact with most persons ; the common names. Poison Sumac and 

 Poison Dogwood for R. Vcrnix should not lead one to confuse it with the true 

 Dogwoods of the genus Cornus which are quite harmless. 



R. Vernix L. Poison Sumac, Poison Dogwood, Poison Elder. 



With compound leaves and entire leaflets ; a relatively southern species of swampy 

 vi/oods, bogs, and shores of ponds, frequent in southern counties at low elevations, 

 extending- north to Dempster and Bradford in south central New Hampshire, and 

 to Sandwich and Tamworth in eastern part of state. 



R. radicans L. Poison Ivy, Poison Oak. 



With leaflets in 3's and shiny, commonly known as Poison Ivy, is a far too 

 abundant plant over much of the state ; of considerable genetic diversity it appears 

 in several sometimes distinct varieties and forms ; careful field-study and complete 

 collections are needed. 



Var. radicans 



Common at low elevations and in much of southern New Hampshire, becoming in- 

 frequent northward to Gorham ; roadsides, fence-rows, and open woods : forma mala- 

 chotrichocarpa (A. H. Moore) Fern., with pubescent fruits, is local near coast. 



Var. vulgaris (Michx.) DC. 



Probably common in southern and central New Hampshire although not much 

 collected; north to Ossipee; same habitat as above. 



Var. Rydbergii (Small) Rehd. 



Locally common in northern New Hampshire and probably throughout at low 

 elevations ; distinct on talus-slopes, less well marked along roads, railroads, and in 

 alluvial soils. 



Ilex verticillata (L.) Gray. var. verticillata. Black Alder, Winterberry. 



Connnon throughout in swamps, bogs, shores of ponds, and thickets, at low alti- 

 tudes : forma chrysocarpa Robins., with yellow fruits, has been collected in Berlin. 



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