2. Larix (Tourn.) Adans. Larch. 
Trees with light green needle-like leaves, deciduous each year, 
those on first year wood alternate, decurrent, those on older wood aa 
porne in tufts of usually 15-40 on peg-like lateral twigs. Staminate- and: 
ovulate cones solitary, borne usually on the same branches of second. year, 
wood, the former subglobose, sessile, the anther sacs 2, the latter com-.} 
posed of spiral series of fertile sporophylls (scales), each bearing two: 
ovules on the upper surface, each subtended by a conspicuous tailed.) x44 
pract; fruit greatly enlarg sed , forming a woody cone, maturing and opening 
in one season, sometimes persistent the second year, the scales thin, the ‘ 
bracts conspicuous , spreading; seeds winged. Cotyledons several. oa 
—~eeeeEens yee 
O /? Branchlets densely woolly; rarely below 6000 ft. D) Le Lyallii = 
C Branchlets glabrous; rarely above 6000 ft. j, Le occidental jeg 
1. ie occidentalis batt. ~- Vestern Larch. ———— A straight, slender tree 
60-50 aie tall , Dimemee vie ye licsnt green, very thin foliage and 
yellowish park; D.Bells Cormonly 9-12 dcm., rarely 15 dem. in our region, 
the butt expanded and protected by aeerply vurroved bark several inches 
thick at the base; branches irregulerly disnosed, drooping slightly, the 
prancilets rigid or in some forms Brae efully sendulous, orunea to 50-60 feet 
r more in closed stands; branchlets brown, soon srgy, siriate from the 
Gecurrent leaz tases, gl*prous, young bark rather lignt srey, dull, marked “d 
with needle scars and achering dwarf branchlets, soon becoming longitudin- 3 
S$ yell owisa, snallov, net-like, often rorming 
tes ma ture 6 ric en a iiat yellowish or _— color; 
crown narrow, ovlon., acute at the arex or rownded in old trees; feovbape- 
i cermeatneemn sara ocammiaeneeonananiiee eae eornNeHS CRE SRED needles 2-5 Cie long, flat, 
but ridged on toth surfaces, slender, acute wut not mucronate, dull, a double 
line- of stomata on eacn swrace, Gecurrent on new growth, but chiefly borne 
on dwarf lateral branches, 7-6 rate long, averasings about 25 in the tuft; 
anthers yellow, in Piatto fotos clusters; mature ovulate cones borne 
chiefly in the umrer hai’ or the crown, 9-5.5 cm. ions, about < cm. wide, 
oval, the scalés soon sireading, about S sm. lons, subrotund, more or less ; 
truncate at the anex, ¢reenish, the bract oblong, brown, 6-7 ra. lon:, the 
wi08S ovlon:; eilanceola ate. 5-4 mmie 1lovce Seealin.; J-4 cm. tall, coty rledons 
5G, Led-1.5 Cre 1Oi., slender, acute, riaged avove, flst bensata, new 
erowtn of —— “nite, leaves 1.5 Ge lon, tippea with a hyaline mucro, flat, 
with two rows, each composed or 0-4 denseiy crowded lines of stomata, on 
the lower surface; by transmitted lisht the margin apnears translucent and : 
the widvein very dark and distinct; base somewnat expanded, leaving a 1 
smali decurrent 3tiur. 
