% 
60 Part I. Chapter 2. 
Gravss, F.M.: The Flora of Mt. Washington. Asa Gray Bulletin 1894: 10—ı2. 
GRAVES, HENRY S.: Practical Forestry in the Adirondacks. United States Division Forestry, Bul- 
letin 26. 1899. 
Gray, Asa: A Manual of the Botany of the northern United States from New England to Wis- 
consin and South to Ohio and Pennsylvania inclusive (the Mosses and Liverworts by 
WM. S. SULLIVANT), arranged according to the Natural System. Boston and Cambridge 1848. 
—— Manual of the Bot. ete., Second 'Edition; including Virginia, Kentucky and all east of the 
Mississippi; arranged according to the Natural System. (Mosses and Liverworts by W=.S. 
SULLIVANT) with fourteen plates illustrating the genera of ferns, ete. ı 59. 
—— Manual etc. Fourth revised Edition. To which is added Garden Botany, an Introduction 
to a Knowledge of the common cultivated Plants. With twenty-two plates, illustrating the 
grasses, ferns, mosses, etc. New York 1863. 
—— Manual of the Botany of the northern States, including the Distriet east of the Mississippi 
and north of North Carolina and Tennessee, arranged according to the Natural System. 
Fifth Edition. With twenty plates, illustrating the sedges, grasses, ferns, etc. New York 
1867 (a second issue in 1868 has four pages of addenda). 
—— School and Field Book of Botany, consisting of “Lessons in Botany”, and “Field, Forest 
and Garden Botany”, bound in one volu New York 1881. i 
-——— Manual of the Botany of the northern United States. Sixth Edition, revised and extended 
Westward to the rooth meridian, by SERENO WATSON and JoHn M. CouLter. New York 
and Chicago 1890; Seventh Edition 1908: Cfr. Rogınson, B.L, and FERNALD, M.L. 
GroUT, A. J.: A List of the Mosses of Vermont with analytical Keys to the Genera and Species. 
Contributions to Botany of Vermont I. Botanical Department University Vermont. 1898, 
with Supplement: Contributions IV, Botanical Department University Vermont. 1898. 
Hart, E. and Worr, J.: A List of Mosses, Liverworts and Lichens of Illinois. Bulletin Illinois 
State Laboratory Natural History I: 18—35. 1878. 
HALSTED, B. D.: Eastern and western Weeds. Bulletin Torrey Botanical Club XIX: 43. 
HARPER, R. M.: Coastal Plain Plants of New England Rhodora VIII: 27. Feb. 1906. 
—— ALong Island cedar Swamp. Torreya VII: 198—200 (1907); The pine Barrens of Babylon 
and Islip, Long Island, 1. c. VIII: 1—9 (1908). 
HARSHBERGER, JOHN W.: An ecological Study of the Genus Talinum, etc. Bulletin Torrey Bo- 
tanical Club XXIV: 178. (1897.) 
—— The Botanists of Philadelphia and their Work; pages xii—457, plates 48. Philadelphia 1899. 
—— An ecological Study of the New Jersey strand Flora. Proceedings Academy Natural Sciences. 
Philadelphia 1900: 632—671. Additional Observations on the strand Flora of New Jersey, 
l. c. 1902: 642—669. 
—— Botanical Ascent of Mt. Ktaadn, Maine. Plant World V: zı, (1902.) 
—— The Forest at the Natural Bridge, Virginia. Forest Leaves IX: 42. (1903.) 
——— The Flora of the serpentine Barrens of southeast Pennsylvania. Science, new series XVII: 
339. (1903.) 
—— A phyto-geographic Sketch of extreme southeastern Pennsylvania. Bulletin Torrey Botanical 
Club XXXI: 125—159. (1904.) 
—— The comparative Age of the different floristic Elements in eastern North America. Proceed- 
ings Academy Natural Sciences Philadelphia 1904: 601. 
—— The plant Formgtions of the Adirondack Mountains. Torreya V: 187—194. (1905.) 
—— The plant Formations of the Catskills. Plant World VII: 276—281. (1905.) 
HART, CHARLES A. and GLEAsoNn, HENRY A.: On the Biology of the Sand Areas of Illinois. 
Bulletin Illinois State Laboratory of Natural History VII: 137—272 (1907). 
HARvEy, W. H.: Nereis boreali-americana. New York 1858. 
HaRrvEY, F.L.: The freshwater Algae of Maine. Bulletin Torrey Botanical Club XV: 155. (1889.) 
HARVEY, LEROY HARRIS: An ecological Excursion to Mt. Ktaadn. Rhodora V: 41. (1903.) A Study 
of the. physiographie Ecology of Mt. Ktaadn, Maine, University of Maine Studies No. 5. 
Orono, Dec. 1903. . 
