104 FLORA OF TASMANIA. [Leguminosce. 
species.— Shrubs or trees (one American species is herbaceous), with alternate leaves, always pinnate on the young 
plant, often reduced to leaf-like petioles in the old one and in the majority of the Australian species. Stipules none 
or minute ; glands often occur on the petioles of the pinnate-leaved species. Flowers small, yellow, collected into 
capitula or spikes, that are simply pedunculate, or spiked or racemed on branching peduncles, often polygamous ; 
the perianth is wanting in a very few species. Calyx of three to five valvate sepals, generally campanulate, and 
more or less united. Corolla of three to five equal valvate petals, also generally united. Stamens very numerous, 
with long, cellular, flexuose filaments, and minute anthers, free or united below into a cup or perigynous disc around 
the pistil of the hermaphrodite flowers ; in male flowers sometimes united into a column, but never into a tube. 
Pollen-grains collected into four or six masses in each anther-cell, each mass composed of sixteen grains, cohering 
into a sphere. Pistil minute ; ovary generally many-ovuled ; style slender, with a capitate stigma. Pod extremely 
variable, very dissimilar in the most closely allied species, so that it does not afford sectional characters of any 
importance, often linear, two-valved, one-celled, many-seeded, sometimes very short and broad, at others divided 
by cellular septa into many cells, rarely terete. Seeds transversely oblong. — Many of the plants of this genus yield 
admirable timber, and others valuable gum. The A. mollissima is the cognizance of Tasmania. (Name from a/ca£<o, 
to sharpen ; in allusion to the spinescence of many species.) 
Series I. PHYLLODINEM.— Leaves reduced to flattened petioles. 
§ 1. Triangulares (Benth.).— Stems not winged. Stipules spinescent, or setaceous, or 0. Phyllodia small, ovate, 
obovate, or Flowers capitate; peduncle simple. 
1. Acacia Gunnii (Benth. in Lond. Journ. Bot. i. 332) ; fruticulus parvus depressus, totus breviter 
puberulus v. tornentosus, stipulis setaceis obsoletisque, phyllodiis parvis ovato- v. lanceolato-triangularibus 
basi oblique cuneatis rectis falcatisve nervo margini inferiori approxiinato in spinam excurrente, angulo 
superiore obtusissimo rarius glandulifero, capitulis sphaericis multifloris, bracteolis peltatis lamina subulato- 
lanceolata.— Benth. in linnaa, xxvi. G07. {Gunn, 423.) (Tab. XVIII.) 
Hab. South Esk Biver, twenty-three miles from Launceston ; near Hobarton, Eagle-hawk Neck, and 
Campbell- town, Lawrence, Gunn, etc. — (El. Oct.) {v. v.) 
Distrib. New South Wales. 
A small bush, 2-3 feet high, very rigid and pungent, more or less covered with small short or long hairs, or 
glabrous. Stipules setaceous. Phyllodia extremely variable in size and form, £-f inch long, rigid, pungent, 
straight or sickle-formed, broad or narrow, tapering from an obliquely cuneate base to a rigid, pungent point ; 
upper margin convex, gibbous, or rounded, lower straight or concave, both thickened ; nerve very stout. Pedun- 
cles longer or shorter than the leaves, pubescent ; capitula spherical. Sepals five, lanceolate, spathulate, pubescent, 
at first united, then nearly free. Petals twice as long, elliptic-lanceolate, nearly free. Stamens very numerous ; 
filaments muted at the base. Ovary linear-oblong. Pods f-1 inch long, compressed, linear, deeply notched be- 
tween each seed ; margins thickened. Seeds nearly orbicular, compressed, mottled green and brown ; funiculus 
slender. — Plate XYIII. Fig. 1, portion of branch, leaf, peduncle, and capitulum ; 2, 3, 4, leaves of various shapes ; 
5, vertical section of young capitulum ; 6, flower; 7, stamen; 8, anther; 9, pollen; 10, ovary; 11, vertical section 
of ovary; 12, ovule; 13, 14, pods; 15, vertical section of one lobe of pod; 16, seed; 17, transverse section of 
seed :— all but 13 and 14 magnified. 
§ 2. Pungextes (Benth.).— Stems not winged. Stipules setaceous, minute or 0. Phyllodia rigid, pungent, linear- 
lanceolate or subulate, terete, one-nerved, not broad and triangular at the base. Flowers capitate; peduncle simple. 
2. Acacia Stuartiana (F. Mull. MSS., Benth. in Linnsea, xxvi. 609) ; fruticulus humilis robustus dif- 
fuses glaber, phyllodiis breviter linearibus lineari-lanceolatisve strictis falcatisve pungentibus uninerviis basi 
angustatis, pedunculis solitariis capitulo sphserico brevioribus, bracteolis peltatis, sepalis spathulatis liberis 
