S. sempérvirens.
2. Sequóia sempérvirens, Endl. (Redwood.) Leaves from ½ to 1 in. long, linear, smooth, 2-ranked, flat, acute, dark shining green, glaucous beneath; branches numerous, horizontal, spreading. Cones 1 in. long, roundish, solitary, terminal; scales numerous, thick, rough, furnished with an obtuse point. A magnificent tree from California, where it grows 200 to 300 ft. high. In the East it can be kept alive but a few years even at Washington.
Genus 103. THÚYA. (Arbor-vitæ.)
Small, evergreen trees with flat, 2-ranked, fan-like spray and closely overlapping, small, appressed leaves of two shapes on different branchlets, one awl-shaped and acute, the other scale-like, usually blunt and close to the branch. Fertile catkins of few, overlapping scales fixed by the base; at maturity, dry and spreading. There are scores of named varieties of Arbor-vitae sold by the nurserymen under 3 different generic names, Thuya, Biota, and Thuyopsis. There are but slight differences in these groups, and they will in this work be placed together under Thuya. Some that in popular language might well be called Arbor-vitæ (the Retinosporas) will, because of the character of the fruit, be included in the next genus.
| * Scales of the cones pointless, thin, straight. (Thuya) | 1, 2. |
| * Scales reflexed and wedge-shaped. (Thuyopsis) | 3. |
| * Scales thick, with horn-like tips. (Biota) | 4. |
T. occidentàlis.
1. Thùya occidentàlis, L. (American Arbor-vitæ. White Cedar.) Leaves in 4 rows on the 2-edged branchlets, having a strong aromatic odor when bruised. Cones oblong, 1/3 in. long, with few (6 to 10) pointless scales. A small tree, 20 to 50 ft. high, or in cultivation 1 to 50 ft. high, with pale, shreddy bark, and light, soft, but very durable wood. Wild north, and extensively cultivated throughout under more than a score of named varieties. Their names—alba, aurea, glauca, conica, globosa, pyramidalis, pendula, etc.—will give some idea of the variations in color, form, etc.
