786 PINACE.E sequoia 



LARIX 



ches, linear leaves and monoecious flowers. Aments terminal 

 and axillary upon young shoots, of rather numerous spirally 

 arranged scales. Staminate flowers small, involucrate with scale- 

 like leaves, with 3-5 anthers under each subpeltate scale. Pollen 

 grains simple. Fertile aments oblong-ovate, erect, with 3-7 in- 

 verted ovules at the base of each scale. Cones maturing the 

 second year, woody, oval, the scales divergent at right angles 

 from the axis, thick and wedge-shaped with a rhomboidal rugose 

 umbilicate apex, setaceous-mucronate. Seeds compressed, oblong- 

 obovate, with thick spreading margins. Cotyledons 4-6. 



S. simpervirens Endl. Syn. Conif. 198. Erect evergreen trees 100-350 

 feet high by 4-20 feet in diameter, with thick fibrous spongy bark, com- 

 paratively short spreading branches and linear 2-ranked leaves: leaves 

 bright green above, glaucous beneath, spreading distichously, those of 

 the main branches appressed, acute, or acuminate and mostly pungent, 

 6-12 line** long, about 1 line wide: staminate aments about 2 lines long: 

 cones oblong, 9-12 lines long by 6 lines thick, of about 20 scales: seeds 

 brown, 2-2}£ lines long. Near the coast, extreme southern Oregon and 

 California, 



Tribe 3 Abietinex Endl. Syn. Conif. 79. Leaf-buds scaly. 

 Leaves scattered or fascicled, from linear to acicular. Staminate 

 flowers spirally arranged and subtended by involucral scales: an- 

 ther-cells extrorse, parallel and contiguous upon the sides of a very 

 narrow connective which is often surmounted by a scarious dilated 

 inflexed tip. Scales of the fertile aments numerous, spirally imbri- 

 cated, carpellary, each in the axil of a thin distinct bract, in fruit 

 becoming coriaceous or woody and forming a cone. Ovules in pairs, 

 adnate to the inner face of each scale near the base, inverted. Seeds 

 separating from the scale at maturity, conspicuously winged. Coty- 

 ledons 3-16. 



6 LARIX Adans. Fam. PI. ii, 480. (1763 ) 



Tall trees with horizontal or ascending branches and small 

 narrowly linear deciduous leaves without sheaths in fascicles on 

 short lateral scaly bud-like branchlets. Aments short, lateral, 

 monoecious ; the staminate from leafless buds ; the fertile buds 

 commonly leafy at base and the aments red. Pollen grains sim- 

 ple. Cones ovoid or cylindric, small, erect, their scales thin, 

 spirally arranged, obtuse, persistent. 



L. occidentalis Nutt. Sylva iii, 143, t. 120. A large tree 100-200 feet 

 high and 1-6 feet in diameter, with thick reddish longitudinally fissured 

 bark: branches short, horizontal, with glabrous branchlets: leaves nar- 

 rowly linear, 1-2 inches long, in alternate fascicles of 12-18, promptly 

 deciduous: cones ovate-cylindric, 1-1^2 inches long, its scales broadly ob- 

 long, truncate, ciliate-fringed when young: bracts scarious, dilated at 

 base, the narrow terminal part exserted. In the mountains of eastern 

 Oregon and Washington to Idaho. 



L. LyallH Parlat. Enuin. Sem. Reg. Fl. 259. A rather small tree 50- 

 100 feet high with horizontal or ascending branches, the branchlets and 

 bud-scales densely pubescent with whitish hairs: leaves narrowly linear, 



