LI. MYRTACE/L. 
[fcucttlypiux. 
<>Ois 
most umbels or of very short axillary flowering branches are sometimes quite abortive, con- 
verting the inflorescence into the second form ; in this again the lower axillary panicles may 
be occasionally reduced to single umbels as in the first, and even in the terminal corymb, 
characteristic of the Corymbosa, a single specimen may here and there show an axillary 
umbel, or after dowering the branches of the corymb may occasionally though rarely grow 
out into leafy shoots, leaving the fruiting umbels lateral below the new leaves. 
The form and dimensions of the calyx-tube (hypanthiuni of Schauer, cupula of De Candolle) 
are taken when the stamens are expanded but still adhering ; after they fall it often alters so 
much that it neither indicates the form it had in dower nor yet that which it will assume in 
fruit. 
The operculum described is always the single one, probably representing the petals, as it 
appears when ready to fall off for the expansion of the stamens. The outer one, of whose 
nature there is still much doubt, exists probably in nearly all species at an early stage, but it is 
usually thin and falls off too soon to be worth mentioning in descriptions. Where, as in 
E. platyphylla , it persists rather longer, it appears to do so in a very variable degree in the 
same species. 
The dimensions given for the stamens refer to the outer ones ; the inner ones are almost 
universally gradually shorter. 
The number of cells of the ovary is also very rarely a guide to the species. They generally 
vary from 3 to 4 or from 4 to 5, very rarely 6, and not constantly so in any species I have seen. 
In K. phatniceu there are only two. 
For similar reasons the seeds are seldom mentioned. The abortive seeds are usually numerous 
in the capsule, unimpregnated and of a hard granular uniform texture, but enlarged, especially 
those near the top of the capsule, and variously shaped according to the degree of mutual 
pressure, the several seeds of the same specimen often differing more from each other than 
the corresponding ones of different species. Of perfect seeds there generally only ripen either 
2 or 3 or a single one in each cell, and their shape is accordingly modified. They are, more- 
over, always near the orifice of the capsule and the first to be shed, and are thus unknown in a 
large portion of the species. The most remarkable are those of the majority of the Corymbose, 
which are large and more or less expanded into a membranous wing. 
The embyro in Eucalyptus appears always to have the cotyledons folded over the radicle, but 
varies much in the shape of the cotyledons, very broad or rather narrow, entire, cordate, 2-lobed 
or 2-partite, and in the comparative length of the radicle, and these differences are very likeLy 
of specific constancy. I have therefore thought it very unsafe to rely upon any of the modifica- 
tions observed for specific distinction. — Benth. 
Series I. Ztenantheras. — Stamens all perfect or very rarely some of the outer ones with 
abortive anthers ; anthers reniform or broad, and flat , the cells diveryent or at lenytli divaricate, 
continuous and usually confluent at the apex. 
Leaves falcate-lanceolate ; apex long and narrow. Peduncles broadly com- 
pressed, bearing 3 to 7 nearly sessile flowers. Fruit globose-ovate, 
truncate, 8 to 10 lines long, 3 to 4-eelled 1 . E. Planchoniana. 
Leaves falcate-lanceolate, somewhat glossy. Umbels containing from 3 to 
10 pedicellate flowers. Anthers broadly cordate, slits divergent. Fruit 
globose-urceolate, 5 to 7 lines diameter, 3-celled 2 . E. Baileyana. 
Leaves on the young plants and sprouts from old stumps 
Small, rough and hairy 4. E. euyenioides. 
Glabrous and often large 6. E. acmenioides. 
Fruit subglobose, much contracted at the orifice, the rim thin, the 
capsule sunk. Buds ovoid. Operculum as long as the calyx-tube. 
Leaf-veins fine 5. E. piperita. 
Fruit subglobose or depressed-globose, the rim very convex or prominent. 
Buds ovoid or obovoid. Operculum usually as long as or longer than 
the calyx-tube, very obtuse. Flowers and fruits sessile 3. capitellata. 
Leaf-veins numerous, fine and parallel (not very close). Buds ovoid- 
acuminate or oblong. Operculum as long as or longer than the 
calyx-tube. 
Stamens much inflected in the bud. Leaf-veins oblique or diverging, 
often scarcely visible on the upper surface. Fruit under Jin. 
diameter. 
Operculum about as long as the calyx-tube. Fruit contracted at the 
orifice. Peduncles terete or nearly so b. E. piperita .’ 
pereulum longer than the calyx-tube. Fruit straight or scarcely 
contracted at the orifice. Peduncles more or less flattened. Umbels 
mostly axillary. Fruit-rim usually broad and flat 7. E. pilularis. 
