Vlil CONTENTS. 
VI. PAPERS ON YUCCA, AGAVE, ETC. 
1. Yucca and Hesperaloe of the fortieth 
parallel . . ot ae. 8 
2. Notes on the genus oo + se. he eee 
Corrections and additions . . 296, 297 
3. Notes on the genus Yucca, No.2 . . 297 
4. Scattered descriptions of Yucca . . . 299 
VII. PAPERS ON CONIFER. 
1. On Pinus aristata and other Coniferz of 
the Rocky Mountains. . - 3826 
2. Conifer of Dr. Parry’s esteation ’ in ‘thes 
Rocky Mountains . 332 
3. Untersuchungen tiber die iene. « s sot 
4. The American Junipers of the section 
Sabina . ex ee 
5. Synopsis of the Aien — es 4: St 
VII. PAPERS ON AMERICAN OAKS. 
1. About the Oaks of the United States . 389 
2. Vegetation along the Lakes . . - 408 
IX. PAPERS ON VITIS. 
. Notes on the Grape-vines of Missouri . 411 
. The North American Grapes . . 412 
: The true Grape-vines of the United States 414 
X. PAPERS ON 
1. Euphorbiacee of the Mexican Boundary 433 
2. Euphorbie of a collection by L. J. Xan- 
tus in Lower California . . . 439 
3. Euphorbiacez of the Ives Kilcicliog - 440 
5. Noteson Agave . . + =o ee 
Additions and seernaiiand sw OES 
6. The flowering of Agave Shawii . . . 317 
7. Amaryllideze of Wheeler’s Expedition . 320 
8. Collected descriptions of Agave . . . 321 
6. Conifers of Wheeler’s scans < «& SAG 
7. The American Spruces . . : » oe 
8. Abietinez of California. . . . dol 
9. Revision of the genus Pinus, and aii: 
tion of Pinus Elliottii. . . > » 260 
10. Collected descriptions of Conifers > oe 
11. Notes on western Conifers . . . . 383 
12. Miscellaneous papers on Conifer . . 383 
3. The Acorns and their germination . . 408 
4. Description of Septoria Querci . . . 410 
4. Collected descriptions of Vitis . . . 426 
5. Miscellaneous notes on Vitis . . . . 427 
. On diseases of theGrape . . . . . 430 
EUPHORBIACES. 
— the ee Euphorbia in DeCandolle’s 
5. ecko of Wheeler’s Exploration 445 
6. Collected descriptions of 44 
