344 
XLIII. LEGUMINOSiE. 
[Jacksonia. 
either in terminal or lateral racemes or spikes, or scattered along the branches. 
Bracts small and scale-like. Bracteoles small, deciduous or persistent. Ovary 
villous. 
The genus is limited to Australia. It is allied to Gompholobium and Burtonia in the deeply- 
lobed valvate calyx, but very different in habit, in the short slender funieles of the ovules, in the 
pod, <fec. In the two species (J. vernicosa and J. thesioides) where the calyx-tube is longer in 
proportion to the lobes, it is lined, at least halfway up, by the staminal disk. — Benth. 
Series I. Phyllodineae. — Phyllodineous branchlets flat, rigidly coriaceous, toothed or lobed, 
often prickly. 
Flowers in racemes or spikes terminating the phyllodia 1 . J. dilatata. 
Series II. Ramosissimse. — Subphyllodineous branchlets crowded, linear, angular-striate, 
with projecting tooth like nodes. 
Flowers in dense terminal spikes. Calyx very hirsute 2. J. odontoclada. 
Flowers in short terminal racemes. Calyx sparingly silky-pubescent . . . 3 . J. ramosissima. 
Series III. Scoparise. — Flowering branches virgate or rush-like without pungent branchlets. 
Barren stems or branches usually similar, although occasionally, in the loicer part of the stem, 
much-branched flexuose or pungent. 
Calyx-tube half as long as the lobes or longer, turbinate, 10-nerved. 
Calyx 4 lines long, the tube half as long as the lobes 4 . J. vernicosa. 
Slightly spinescent, branches slender, sulcate. Flowers dark-purple . . 5. J. rhadinoclona. 
Calyx 2 lines long, the tube nearly as long as the lobes 6. J. thesioides. 
Calyx-tube very short, without prominent nerves. Calyx-lobes deciduous. 
Buds not angular. 
Branches flat or angular. Pod on a long stipes about §in. long. 
Flowers racemose. Calyx 2£ to 3 lines long 7. J. scoparia. 
Plant procumbent. Branches thin. Flowers in pairs. Calyx silvery-silky. 8. J. Stackhousii. 
Branches angular. Calyx 2-bracteolate. Flower purplish or bluish, the 
upper lip deeply divided 9 . J. purpurascens. 
1. J. dilatata (expanded), Benth. in Ann. Wien. Mus. ii. 74, and FI. Austr. 
ii. 54. An erect shrub, silky-pubescent or tomentose, or at length more or less 
glabrous, more or less rust-coloured under the inflorescence. Branchlets leaf- 
like, flat, lanceolate, 2 to 4in. long, the nodes forming tooth-like notches on the 
edges with an arched nerve from the midrib to each node. Flowers sessile in 
oblong spikes or heads at the ends of some of the leaf-like branchlets, which 
taper more to the end than the barren ones. Bracts ovate, scale-like, 1 to 
line long, bracteoles often longer and lanceolate, all very deciduous. Calyx 
villous, about 3 lines long. Standard about as long as the calyx, lower petals 
shorter. Ovary very shortly stipitate. Pod ovate, silky, shorter than the calyx, 
containing one black seed. 
Hab.: Islands of the Gulf of Carpentaria, R. Brown ; towards Lake Nash, M. Costello. 
2. J. odontoclada (the branches appearing toothed), F. v. M. Herb.; Benth. 
FI. Austr. ii. 55. Pubescent or villous, with short loose hairs and densely 
branched. Barren branchlets short, crowded, linear, angular or somewhat 
flattened, the minute scales confluent, with tooth-like projections at the nodes. 
Flowers sessile, or nearly so, in dense terminal spikes or heads. Bracteoles 
lanceolate, adnate to the base of the calyx, and longer than its tube. Calyx 
densely hirsute, 4 to nearly 5 lines long, the tube under 1 line, the 2 upper lobes 
often connate to the middle. Petals shorter than the calyx ; keel shortly 
acuminate, broader than the wings and longer than the standard. Ovary sessile. 
Young pod densely villous, turgid, but not seen ripe. 
Hab.: Gulf of Carpentaria, F. v. Mueller. 
3. J. ramosissima (very branchy), Benth. in Mitch. Trop. Austr. 258 and 
FI. Austr. ii. 56. Shrub scarcely more than 3ft. high, glabrous, very densely 
branched. Barren branchlets crowded, linear, angular or somewhat flattened, 
the small scales at the nodes often rigid and spreading. Flowers in short terminal 
