10-NE, 10-SE, 10-N. Alnus serrulata (Ait.) Willd., hazel alder. Sw. 
N.S., s. N.B., and c. Maine, w. to N. Y., Ohio, Ind., Mo., and 
extreme se. Kans., s. to e. Okla. and e. Tex., and e. to n. Fla. 
11-N, LI-NE, LI-SE. Amelanchier (Michx.  f.) 
downy serviceberry. S. Nfld.. N. S., N. B., s. Que., and Maine, w. to 
arborea Fern., 
s. Ont., n. Mich., and e. Minn., s. to extreme se. Nebr., e. Kans., 
e. Okla., and La., and e. to n. Fla. 
12-N, 12-NE. Amelanchier alnifolia (Nutt.) Nutt., western service- 
berry. C., s., and se. Alaska, Yukon, and Mack., s. to n. Calif., and e. 
to Colo., Nebr., nw. lowa. w. Minn., and Man. Local e. in s. Ont. and 
sw. Que. 
13. Amelanchier interior Nielsen, inland serviceberry. \. Mich., 
Wis., Minn., e. lowa, and n. Ill. 
14. Amelanchier sanguinea (Pursh) DC., roundleaf serviceberry. 
Maine and sw. Que. w. to s. Ont., Mich., and n. Minn., s. to n. lowa. 
Ohio, Pa., n. N. J., and Mass. Also s. in mts. to w. N. C., and e. Tenn. 
15. Aralia spinosa L., devils-walkingstick. N. J. and ec. and 
w. N. Y., w. tos. Ohio, s. Ill., and se. Mo.. s. to se. Okla. and e. Tex.. 
and e. to c. Fla. Also escaping from cult. from s. New Engl. to Mich. 
and naturalized locally in Conn. and perhaps elsewhere. 
16. Asimina triloba (L.) Dunal. pawpaw. Pa. and w. N. Y., w. to 
extreme s. Ont., s. Mich.. n. Ill, s. lowa. and se. Nebr. s. to e. Kans. 
and e. Tex., and e. to s. La., nw. Fla., and Ga. Also extinct in N. J., 
sw. Wis.. and ne. lowa. 
17-N, 17-SE. Avicennia germinans (L.) L., black-mangroye. Silt 
shores of coasts and islands of s. to n. Fla., including Fla. Keys. 
s. Miss., s. La., and s. Tex., northward local and not hardy. Also 
widely distributed on coasts of tropical America in West Indies. 
and V.1., Mex., C. Am., and 
S. Am. (A closely related species in tropical w. Africa.) 
18-NE, 18-SE. Baccharis halimifolia 
Plain, generally near coast, from Mass. s. to s. Fla. incl. Fla. Keys, w. 
to s. Tex., and n. in Miss. Valley to se. Okla.. Ark., and n. Miss. Also 
including Bermuda, Bahamas, P. R., 
. eastern baccharis. Coastal 
Bahamas and a yar. in Cuba. 
19. Betula uber (Ashe) Fern., Ashe birch. Very local in sw. Va. 
(Smyth Co.). classed as extinct until rediscovered in 1975. Regarded 
also as an artificial hybrid and perhaps to be excluded. 
20. Bumelia lanuginosa (Michx.) Pers., gum bumelia. C. Fla. and 
Ga. w. to s. Miss., La.. and in Miss. Valley to s. Ill, ¢. Mo., e. and 
s. Kans., and w. and s. Tex., and s. to ne. Mex. (Coah., N. L., and 
Tamps.). Also a var. in extreme sw. N. Mex., se. Ariz., and ne. Son. 
21. Bumelia lycioides (L.) Pers., buckthorn bumelia. Coastal Plain 
from se. Va. s. to n. Fla., w. to se. Tex., and n. in Miss. Valley to se. 
Mo., s. Ill., s. Ind., ¢. Ky., and e. Tenn. 
22. Bumelia tenax (L.) Willd., tough bumelia. Coastal Plain of 
S. C., mostly near coast, se. and s. Ga..s. to s. Fla. 
23. Carya floridana Sarg., scrub hickory. Local in c. Fla. (Volusia 
and Marion Cos., s. to Charlotte and Palm Beach Cos.). 
24. Carya pallida (Ashe) Engl. & Graebn., sand hickory. Coastal 
Plain from s. N. J. and Del. s. to Ga., w. to nw. Fla. and se. La., and 
n. in Miss. Valley to Tenn., se. Ky., s. Ill, and sw. Ind. Also recorded 
from Conn. 
25. Carya texana Buckl., black hickory. Sw. Ind.. c. Ill, Mo., and 
se. Kans., s. to c. Okla., Edwards Plateau and s. Tex., and La. 
26. Castanea alnifolia Nutt., Florida chinkapin. Coastal Plain from 
N.C. to n. Fla. and se. La. 
27-NE, 27-NE. Castanea dentata (Marsh.) Borkh., American chest- 
nut. S. Maine w. to N. Y., extreme s. Ont., and se. Mich., s. to Ohio, 
s. Ind., extreme s. Ill., s. to s. Miss. and sw. Ga. Formerly also nw. 
Fla. Almost exterminated nearly half century ago by the chestnut 
blight fungus, but stump sprouts persist. 
28. Castanea ozarkensis Ashe, Ozark chinkapin. Local in Ozark 
Plateau of s. Mo., Ark., and e. Okla. 
29. Castanea pumila Mill., Allegheny chinkapin. N. J. and s. Pa., 
sw. to extreme e. Ky., Tenn., Ark., and se. Okla., and s. to e. Tex. 
and ec. Fla. Also local in s. Ohio. 
30. Catalpa bignonioides Walt., southern catalpa. Native probably 
Fla.. Ala.. and Miss.. 
uncertain. Widely naturalized from s. New Engl. and N. Y. w. to 
in sw. Ga., nw. the original distribution 
Ohio., s. Mich., Mo.. and Okla., and s. to e. Tex. and Fla. 
31. Celtis tenuifolia Nutt.. Georgia hackberry. Pa. and extreme 
s. Ont., w. to Ind., Mo.. and se. Kans., and s. to e. Tex. and n. Fla. 
32-NE, 32-SE, 32-N. Cephalanthus 
buttonbush. Sw. N.S., s. N.B., and Maine, w. to s. Que., s. Ont., 
occidentalis L., common 
and se. Minn., s. to w. Kans. and Trans-Pecos and s. Tex.. and e. to 
s. Fla.. and in Ariz. and Calif. Also s. in Mex. and C. Amer. to Hond., 
and in Cuba. The same or a closely related species also in e. \sia. 
33-W, 33-NE, 33-SE. Cercis canadensis L.., 
and Pa.. w. to s. Mich. and se. Nebr., s. to Trans-Pecos and s. Tex.., 
eastern redbud. N. J. 
and e. to c. Fla. Also n. Mex. (e. Chih. and Coah., e. to Tamps., and 
s. to S. L. P. and Hgo.). Extinct at | locality in extreme sw. Ont. 
34. Chionanthus virginicus L., fringetree. 5. N. J. and s. Pa.. w. to 
s. Ohio, e. Ky., and s. Mo., s. to se. Okla. and e. Tex., and e. to 
c: Fla: 
35. Cladrastis kentukea (Dum.-Cours.) Rudd, yellowwood. Rare 
and local in extreme sw. Va., Ky.. s. Ind., s. Ill. sw. Mo., and 
e. Okla., and e. in Ark., Tenn., Miss., Ala., 
w. N.C. 
36. Clethra acuminata Michx., cinnamon clethra. Mts. of W. Va.. 
extreme n. Ga., and 
w. Va., e. Ky., e. Tenn., w. N. C., extreme nw. S.C., and extreme 
nwGa: 
37. Cliftonia monophylla (Lam.) Britton, buckwheat-tree. Coastal 
Plain from se. Ga. and n. Fla., w. to se. La. 
38-NE, 38-SE, 38-N. Cornus alternifolia L. f., alternate-leat dog- 
wood. Nfld. and se. Que. w. to Maine, s. Ont., Minn., and s. Man., s. 
to Mo.,n. Ark., Miss., nw. Fla.. and Ga. 
39. Cornus drummondii C. A. Meyer, roughleaf dogwood. Ex- 
treme s. Ont., Ohio, and s. Mich., w. to lowa, se. S. Dak.. and 
c. Nebr., s. to c. and se. Tex., and e. to s. La. and Miss. 
40-N,40-NE. Cornus rugosa Lam., roundleaf dogwood. N. >.. 
N. B., 
Man., and s. to lowa, n. Ind., n. Ky., Pa., and \. J. and in mts. to 
W. Va. and sw. Va. 
41. Cornus racemosa Lam., gray dogwood. Maine and s. Ont. w. 
to n. Mich., Minn., and s. Man., s. to N. Dak., e. S. Dak., n. Nebr., 
Mo., and n. Ark., and e. to Tenn., and N.C. 
s. Que., and Maine, w. to s. Ont., n. Mich., Minn., and se. 
42. Cornus stricta Lam., stiffcornel dogwood. Chiefly in Coastal 
Plain from Va. to c. Fla. and e. Tex., n. in Miss. Valley to se. Okla.. 
se. Mo., c. Ill, s. Ind., and Ky. 
43-N, 43-NE. Cornus stolonifera Michx., red-osier dogwood. Very 
widely distributed from Ntld. and Labr., w. across Can. and n. 
contiguous U.S. to Yukon and ec. Alaska, s. in w. mts. to ec. Calif., 
s. Ariz., and s. N. Mex., and e. from Nebr. to s. Ill., W. Va., n. Va., 
and n. N. J. Also mts. of n. Mex. (Chih., Dgo., and N. L.). 
44-N, 44-NE. Corylus cornuta Marsh., beaked hazel. Nfld.. N.5., 
and s. Que., w. across s. Can. to c. B. C., s. in Pacific Coast region to 
w. Wash., w. Oreg., and in Coast Ranges and Sierra Nevada to 
c. Calif., e. in mts. of Colo., and from ne. Wyo. and Black Hills e. to 
ne. lowa, Wis., Pa., and n. N. J., and s. mostly in Appalachian Mts. to 
n. Ga. and ne. Ala. 
45-N, 45-SE. Cyrilla racemiflora L., swamp cyrilla. Coastal Plain 
from se. Va. to c. Fla. and w. to se. Tex. Also West Indies in mts. 
