103 
No. 94. 
Eucalyptus L u eh in a union a, F.v.M. 
Luehmann’s Gum. 
(Family MYRTACE^E.) 
Botanical Description. —Genus, Eucalyptus. (See Part II, p. 33.) 
Botanical Description.--Species, E. Luehmanniana, P.v.M., in Fragm. xi, 33 
(Nov., 1S7S). 
It may be described in the following words :— 
A straggling tall shrub or small tree, rarely exceeding a height of 15 feet to 20 feet, or a stem- 
diameter of 3 inches ; the stem smooth, and the timber pale-coloured. 
This species is glaucous, even nearly white. At the same time it imperceptibly passes into a 
non-glaucous form. The branchlets are angular, and the species is coarse—peduncles, fruits, 
leaves, Arc., being alike large. 
Juvenile leaves coarse, up to 7 inches long by 4 inches wide; the resemblance to those of 
E. hcemastoma is striking. 
Mature leaves distinctly falcate, up to 8 inches by l.( inch, coriaceous, edges thickened, 
marginal vein usually at a little distance from the edge. 
Peduncles very much flattened. I have specimens which spread out upwards so much that 
they are 4 inch wide at the place of attachment of the inflorescence. Top of peduncle quite 
broad and fleshy, in which the pedicels are articulate. 
Buds angular, pointed. 
Calyx-tube. —The calyx often tapers into a widely-expanded lobe, which is articulate on a broad- 
topped common peduncle; usually seven flowers in a head 
Operculum, double operculum or large calyptra-like bracts enveloping the whole head of flower- 
buds, and only thrown off when the individual flower-buds are nearly ready to throw off 
their own opercula. 
Fruit, often pale-brownish and glossy, five-celled, corrugated—partly due to drying; the rim 
slightly projecting. 
Botanical Name. — Eucalyptus , already explained (see Part II, p. 34) ; 
Luehmanniana, in honour of J. G. Luehmann, for many years assistant to the late 
Baron von Mueller, and afterwards Curator of the Melbourne Herbarium. (See 
Part XIX, page 179, of this work.) 
Vernacular Names.— The typical species is, as has been already stated, but 
a tall shrub or small tree. On the Blue Mountains, however, it attains the dignity 
of a large tree (named variety altior, Deane and Maiden). There it is known and 
cut-commercially as “Mountain Ash”; but it must not be confused with the true 
Mountain Ash of New South Wales, known to botanists as Eucalyptus Sieberiana. 
Variety altior, which is found in the valleys of the higher parts of the Blue 
