EXPLANATION OF FIGURES. 
Pl.I. fig.1. A branch, gathered in Sear showing two mature zavest of the pre- 
ceding years, floweri and tk g f the spring. One-half 
nat, size 
T + d th Nat. 
Le 
fig. 2. e, 
fig. re Their close serratures, est OF ao re: 
figs. 4-7. Sections of | 30 times, 4 and 5 of binate, 
leaves; the ducts are seen clo sely appressed to the sheath which encloses 
r es; these bundles are, as in most pine 
either paren, or closely approximate most united 
wide or small, few or many, in these specimens, varying from 4 to 9. 
PL Il. fig. $8. Male inorescece, capitate, with the elongated flowers in the axils of 
ringed bra 
Pi. fig. 9. One nora reste magn. 3 times, exhibiting the calycoid involucrum 
PL 7 fig. 10. A bract, an 
fig. 11. The Siivetinevsinn from the dorsal, and fig. 12 from t tral xhibit- 
sac e lowest lateral pair of bracts and the pe Nene inner ro upper 
agn, 4 times. : 
Fist. fig. 3 Diagram m of the involucrum with the supporting bract; the 2 outer scales 
re strongly, the 4 eas ones Pies: keeled. 
fig. 14 aia 10 te Bftcte an! nties fro: abov ve and the age, WE er the transverse 
nei Magn. 1otimes. 
hl th Pipe, § th } 4 } 
ef 
elongating 
Pic lie: figs ts: 
fig, 16. The same, a little more edvanced. 
fig. 17. An ament magnified twice 
fig. 18. A — flower (carpel sc iat e) in the axil of the broad retuse ool 
upper, cuspidate, half being visible, and below the bifid t of the 
‘ata Pea cae vules—in February, Magn. 10 gas. 
fig. 19. Female ae Reet hehe ‘wo months later, recurved. 
Pl. I. fig. 20. One of th 
Pl. III. figs. 21-24. hed cones sof re sizes at = showing their variability- 
fig. 25. eadin. 
Base of an open cone with spr 
figs. 26, 27,28. Scales aay cone. Beta 26, a al view, showing the bract and the 
eager hie fig. 27, v rom above, soe ay ee reg ithe hooey by 
seed and a surface pies dere a ing h ; fig- 
fig. a9. Post from the lower, and fig. 30 from the 1 upper sd with pier 
shaped wings; t in fig. 29 the nrg under surface of the seed i is seen; fig. 
Album and embryo et different shapes. Saves 4 thes: 
mber. 
figs. 3 
Fi. as fig. oe ee a nie ead in N 
fig. 34. A seedling che the flowing spring, ae ay 8 sing ease the pri- 
y Mr. us Roetter, late of S 
who eer ‘ai himself he favorably persis lees — went year $ ago, by the <baned 
Cactus and who 
since greatly added to his fame and his usefulness by his artistic work in the Bestopicat 
Institute in Cambridge. 
. 
