18. Globulus, Labill

Blue Gum. Figs. 1425-1427. Tree, 300 ft. or less high: bark deciduous in long thin strips or sheets, leaving the trunk smooth and grayish or bluish white except at base: leaves lanceolate, thick, often 1/2 - l ft. long; those on young shoots and seedlings opposite, sessile, broad, and white-mealy: flowers solitary or 2 or 3 together, closely sessile or on a short peduncle; calyx-tube and lid warty, covered with bluish white wax; stamens above 1/2in. long: fruit angular, 3/4-l in. across, the flat valves not protruding. Dec-May. F.v.M. Eucal. 6:2. G.C. II. 15:601; 111.2:777,784; 10:737. Gn. 71, p. 18; 75, p. 606. Maiden, Crit. Rev. Eucal. 79 (figs. 1-12). - The best species for general planting: extensively used in Calif. Its combination of rapidity of growth, straight-ness of trunk, great strength of wood, and its known ability to flourish under a wide range of conditions in Calif., give it a great advantage over any other species (Ingham). Wood stronger than that of E. rostrata and E. terelicornis, yellowish white, easily stained, not durable in the soil in Calif.: used there for insulator pins, spokes, felloes, whiffle-trees, handles, flooring and interior finish; a good species for fuel: logs check badly in curing, this much less in the so-called "San Jose blue-gum" or "re-enforced gum" which, however, is thought by some to be only a selection of the best trees of ordinary blue-gum. Leaves distilled for oil: flowers yield much honey to bees, but because of its pronounced flavor there is little or no demand for it in retail trade (Richter). Endures minimum temperatures of 25° and high temperatures of the San Joaquin and Sacramento Valleys but not of the desert districts: resists considerable drought when once established but best development is attained only on good and fairly deep soil.

Fig. 1427 shows the stamens and the structure of the bud. Nos. 1-4 are half natural size; 5 is on a larger scale. No. 4 is a section of a bud.

Eucalyptus globulus, showing spray of mature foliage ( X 1/6) and two leaves of sucker foliage. No. 18.

Fig. 1425. Eucalyptus globulus, showing spray of mature foliage ( X 1/6) and two leaves of sucker foliage. No. 18.

Eucalyptus globulus. Shoots on a young plant. (X 1/3) No. 18.

Fig. 1426. Eucalyptus globulus. Shoots on a young plant. (X 1/3) No. 18.

Eucalyptus globulus. No. 18.

Fig. 1427. Eucalyptus globulus. No. 18.

Variety compacta, Hort. Dwarf Blue Gum. Densely branched from the ground, forming a symmetrical rounded compact tree: lower foliage as in young growth of E. globulus but smaller with the longer narrower leaves only near the top. - Said to have originated near Niles, Calif., from seed of the ordinary blue-gum (Calif. Nursery Co.).

The specific name globulus is sometimes written with a capital G, because it is a noun rather than an adjective; but the initial letter is here written in lower case in accordance with a recommendation of the International Botanical Congress.

19. Alpina, Lindl

Shrub, 12 ft. high: leaves inequilaterally semi-ovate, blunt, acute on young shoots, 2-4 in. long, thick and leathery: flowers sessile in the If . - axils, solitary or few: fruit hemispherical, 3/4 - 1 in. wide, not angular; rim broad; valves protruding. Sept. - Nov. F.v.M. Eucal. 2:1.

20. Tetraptera, Turcz

Shrub or small tree: branches often sharply angled: leaves very thick, oblong-lanceolate: flowers solitary, on flat recurved peduncles; lid 4-angled, much shorter than calyx; stamens not over 1/2in. long: fruit prominently 4-angled, 2-3 in. long, 3/4-1 in. wide, the valves well inclosed. F.v.M. Eucal. 2:10. - Highly ornamental; once grown at Santa Monica, according to Kinney who says that the calyx-tube and stalk just before the lid falls become a brilliant crimson and are by far the most striking part of the flower

21. Cosmophylla, F.v.M

Tall shrub or small tree: bark smooth, ash-colored: leaves broad-lanceolate, 3-5 in. long, very thick and rigid: peduncles almost 0; lid hard, low-hemispheric, blunt or short-pointed; stamens 4-6 lines long; anthers ovate, opening by distinct parallel slits: fruit globose-truncate, not contracted at orifice, smooth, 7-8 lines across; rim thick. F.v.M. Eucal. 7:2.

22. Cordata, Labill

Small tree, to 50 ft.: leaves opposite, sessile, orbicular to ovate, somewhat crenate, rarely over 3 in. long, usually white-mealy, as also the infloresence: calyx broadly campanulate, obtuse at base, smooth; lid low-hemispherical, obtuse or with sharp tip, shorter than tube; stamens 3-4 lines long; anthers opening by parallel slits: fruit globular-truncate, hard, 4-6 lines thick; valves rarely protruding. F.v.M. Eucal. 8:1. B.M. 7835. G.C.III. 3:803; 30:456; 47:168. - Useful mainly as an ornamental.

23. pulverulenta, Sims. Leaves always entire: calyx-tube turbinate, tapering to the base; lid variable, mostly conical: otherwise about as in E. cordata. F.v.M. Eucal. 8:7. B.M. 2087. Gn. 75, p. 140 - The very blue foliage supplies a pleasing contrast for ornamental planting.

24. Cornuta, Labill

Yate Tree. Moderate-sized or large tree, usually low-branched and spreading: bark either deciduous in irregular sheets or persistent and rough: leaves oblong or broad-lanceolate, often obtuse, 2-5 in. long: flowers greenish yellow, numerous, in dense heads; lid cylindric, horn-like, 1-1 1/2 in. long; stamens l 1/2 - 2 in. long: fruit short-cylindric, 4-5 lines wide; valves much exserted and connivent into a beak-like projection. June-Oct. F.v.M. Eucal. 9:1. B.M. 6140 (lid too highly colored). - Used successfully as a roadside tree in S. Calif.: especially good as a shade tree: adapted to the lemon belt, and tolerating alkaline and saline soils (Franceschi). Timber hard, heavy, tough, and elastic.