. 
ON PINUS ARISTATA, ETC. So 
§ nthere connectivo apice in cristam transversam circularem seu semicireularem recurvatam excrescente, 
loculis longitudinaliter dehiscentibus distinctis. Folia infra supraque carinata tetragona cicatricem subrhombeam re- 
linquentia, sicca decidu 
4. CEDRUS, Link: squame strobili in ramo breviter minalis erecti versus apicem incrassate, demum ab axi 
solute cum bracteis eajareenerentir decidus ; semina ale basi lacere adnata, testa vesiculis balsamiferis repleta ; em- 
bryo solus inter czeteros curvatus ; amenta mascula ex apice ramulorum annotinorum fere biennia (etate precedente 
evoluta); folia fasciculata, — Codie 
5. Picea, Link: squame strobili nutantis vel cum ramulo ge _ persistentes; semina demum e basi ale liber 
decidua, eoeit balsamiferis destituta; amenta mascula in axillis foliorum versus apicem ramorum hornotinorum 
sessilia ; py circum axin undique porrecta. — Spruce. 
is uctificatio biennis ; squamee strobili sublignose, aoe apophysi seepius pyramidata incrassate, cum bracteis 
minus fecaes persistentes. Semina basi ale demum deciduz velut annulo cincta vesiculis balsamiferis 
hatin ip a in paucis angustissima squame ite in vere P. flexili ‘daviafocinia pers 8 menta 
mascula ex axillis bractearum scariosarum orta, squamis ge ge Pica ccappriae involucrata, i in hs ma ramulorum [212] 
iesadeeisties parte in spicam compositain congesta ; an ivo apice in umbonem sepius emarginatum 
seu in cristam transversam variam excurrente, loculis Lapeer dehiscentibus distinctis. Amenta feminea in 
ramulis hornotinis subterminalia singula seu subverti ata. olia ex axillis perularum singula-quina, basi vaginis 
membranaceis polyphyllis rae integra seu margine ae superiore serrulata ; singula teretia, bina supra plana 
seu demum concava, dorso convexa, plura supra curinata, akes plana seu convexa 
6. Prnus, Linn. Gen. ed. 1, Link. — Pine. 
Picea EnGELMANNI,* Parry, sub Abiete, St. Louis Trans. 2, p.122. Abies nigra, Engel. in Sill. Journ, 33, p. 330, non 
Poir,: arbor elatior, emer ; cortice tenui squamato rubello ; ramulis pubescentibus ; perulis ovatis obtusis squar- 
rosis ; ; foliis confertis robustis compresso-tetragonis abrupte Sines plerumque curvyatis ; amentis ovato-cylindricis 
s late ovatis involucratis, joaaaaade bracteis squamas ovatas obtusas crenulatas squarrosas longitudine sube- 
- as 8q) 
quantibus ; strobilis ovato-cylindricis obtusis terminalibus lateralibusve cum ramulis suis horizontalibus seu declinatis, 
squamis tenuibus obovato-rhombeis apice plus minus truncatis emarginatis crenulato-erosis ; seminum ala oblique 
ta. 
Higher parts of the Rocky Mountains, from New Mexico to the headwaters of the Columbia and Missouri Rivers, 
and probably further ; from the subalpine to the alpine districts, and with Pinus aristata reaching the highest limits of 
timber ; occupying in Colorado a belt between the limits of 8,000 and 12,000 feet, it reaches its fullest development 
between 9,000 and 10,000 feet, near the headwaters of the streams on both slopes of the Snowy ray constituting 
magnificent forests about the head of Middle Park, at Tarryall, ete., often mixed with Abies grandis; not found lower 
down, e.g. at Fontaine-qui-bouit, where Picea Menziesii, with Tsuga Douglasit, reign as monarchs of the — Flowers 
eud of Jun 
In a most favorable localities this species makes a stately tree, 60-100 feet high, forming a narrow, sharply- 
— spire, of a rather darkish hue; trunk perfectly an ce tapering very gradually, 14-23 feet in diam- 
; branches mostly small, lower ones horizontal, upper 0 scending : on higher altitudes it is a smaller, nearly 
wen -topped tree, very much branched, bearing more ties b fruit that | in either lower or higher sehr on the 
highest summits a prostrate and almost creeping, sterile shrub, just as Picea igre is found on Mt. Was on, 
N.H. Barkonly 1-14 lines thick, scaly, reddish, grayish-purple or light purplish- brown, containing much Ani ; [213] 
wood soft, white, not knotty nor resinous, therefore much esteemed for inside and cabinet work ; annual rings 
3-1} lines, on an average 3-1 line wide. Leaves stouter one they usually are in P. alba or nigra, but less so than in 
P. Menziesii ; in the higher localities 6-9 lines long and not quite 1 line wide ; strongly carinate below, less so above, 
with a few lines of white stomata above and below, ro but not sharply acute ; in lower localities the leaves are 
more slender and 8-12 lines long, and if I am correct in referring here some doubtful forms, it occurs also with whiter, 
more slender, and longer leaves (10-15 lines, Fendler, No. 833, from a young tree without neem mountain valley above 
Santa Fé), and with almost glabrous aes and ill more slender and very acute leaves (5-10 lines ; Dr. Hay- 
den, from the Big Horn Mountains ; detached cones from that locality oe belong here). I find the leaves in this 
genus extremely variable ; P. nigra at least, of which I have been able to compare a large number of specimens, varies 
so much, that any attempt to base specific characters on the form of the ia seems nugatory ; the leaves in that spe- 
cies are straight or curved, slender or stout, quadrangular or compressed, — acute, subacute, or very obtuse, — whitish, 
* A reprint of the account of this species, credited by cag to the ‘* Transactions of Academy of Sciences of Philadel- 
phia,” oceurs in the Gardeners’ Chronicle for Oct. 31, 1863, p. 1035. — Eps. 
