62 FABACEAE 
with red-brown veins; standard 14-19 mm long, 
glabrous; margins of keel fringed with crisped 
white hairs in lower half, apex twisted. Pod 
stramineous to grey, reflexed, obovoid-oblong, 
50-65 mm long, 19-20 mm wide, glabrous. Seeds 
34-48, red-brown, cordiform, c. 4.5 mm long, 3.5 mm 
wide. Flowering: Feb - Mar; fruiting: Mar. Fig. 19 
Found in the Old World tropics from India to 
Australia. Occurs in the Top End of the NT and in 
north Qld on black soil floodplains, often in shallow 
water. Rare in the DR where known only from the 
Adelaide and Finniss Rivers. 
C. retusa L. 
An erect annual or short-lived perennial shrub to 
1.5 m tall, branchlets striate. All vegetative parts 
(except upper leaf surface) and calyx with closely 
adpressed grey short hairs. Stipules persistent, 
filiform, 1-1.5 mm long. Leaves simple; petioles 2-3 
mm long; blades discolorous, obovate or oblanceolate, 
20-141 mm long, 6-34 mm wide, L/W 2.5-6.4, 
vesicular glandular above, base attenuate or cuneate, 
apex rounded to emarginate. Inflorescence to 360 mm 
long; bracts narrowly triangular, 2-3 mm long. 
Pedicels 5-10 mm long; bracteoles medial on the 
pedicel. Calyx 9-14 mm long; lobes triangular, 1-2 
times as long as tube. Corolla yellow tinged reddish; 
standard 12-23 mm long, main vein hairy; keel twisted 
at apex; free margins of keel densely fringed with 
crisped hairs. Pod grey-brown, obovoid-oblong, 
25-41 mm long, 10-12 mm wide, glabrous, 
subglaucous. Seeds 14-20, pale yellow, cordiform, 
4.5-5.5 mm long, 3.5-4.5 mm wide. Flowering: 
Crotalaria 
Dec - Sept.; fruiting: Feb - Nov. Fig. 19 
Pantropical and widespread in tropical Australia. 
Grows in open habitats, often associated with 
disturbance. Relatively uncommon in the DR. Causes 
Kimberley Horse Disease or Walkabout Disease in 
horses (Everist, 1979). 
C. verrucosa L. 
An erect annual or perennial herb to 1 m tall, stems 
quadrangular. All vegetative parts and calyx with 
adpressed to patent white to brown short hairs. Stipules 
persistent, foliaceous, sublunate, strongly falcate, 5- 
30 mm long, 2-9 mm wide. Leaves simple; petioles 
4-10 mm long; blades discolorous, obovate, deltoid, 
ovate, suborbicular or lanceolate, 45-175 mm long, 
15-100 mm wide, L/W 1.1-3, base attenuate, apex 
emarginate, acute or obtuse. /nflorescence to 270 mm 
long; bracts filiform, 2-6 mm long. Pedicels 5-9 mm 
long; bracteoles on pedicels. Calyx 7-12 mm long; 
lobes triangular, c. 2 times as long as tube. Corolla 
pale blue to purple with darker veins; standard 11-20 
mm long, main vein sparsely hairy; keel twisted at 
apex, free margins of keel fringed with crisped hairs. 
Pod pale to dark brown, subcylindric, slightly falcate, 
40-80 mm long, 9-13 mm wide, with patent soft hairs, 
sometimes resinous inside. Seeds 20-32, pale brown, 
reniform, 4.5-5 mm long, 3.5-4 mm wide. Flowering: 
Feb - Aug; fruiting: Mar - Aug. Fig. 19 
Found in the Old World tropics from India and 
China to Australia. Widespread in tropical Australia, 
often growing along water courses. In the DR known 
only from among granite boulders at Mt. Bundey. 
CYCLOCARPA K.Afzel. ex Baker 
A monotypic genus occurring sporadically through the Old World tropics, including tropical Australia, but 
not common in the NT. [Reynolds, 1990] 
C. stellaris K.Afzel. ex Baker 
A decumbent or prostrate annual herb to 30 cm 
tall. Glabrous throughout, except for rigid minute hairs 
on the under side of the leaf rachis and margin of the 
pod. Stipules brown, membranous, produced equally 
above and below the point of attachment, 5-7.5 mm 
long, striate. Leaves alternate, paripinnate, sensitive 
to touch; rachis to basal leaflets <1 mm, 3-10 mm 
overall; stipels absent; leaflets in 2-4 pairs, slightly 
discolorous, obovate-oblong, 5-8.5 mm long, 2-2.7 
mm wide, L/W 2-3.2 mm, punctulate, base oblique, 
margins finely serrulate toward apex, apex obtuse or 
rounded, apiculate, Flowers 1-2 in axillary fascicles; 
bracts persistent, brown, narrow, c. 1.3 mm long, 
membranous, striate. Pedicels c. 2.5 mm long with a 
bract at base and 2 bracteoles at distal end; bracteoles 
like bracts, ovate. Calyx caducous, 3-4 mm long; 
deeply 2-lipped, obscurely lobed. Corolla yellow; 
standard c. 3 mm long, shortly clawed; wings with a 
few transverse lamellae. Pod articulated, dark brown, 
flattened, coiled, 4-5 mm diam.; articles 6-13, 
truncate-triangular, glabrous. Seeds olivaceous, 
stramineous to brown, asymmetric, triangular, 
0.7-1.2 mm long, 0.7-1 mm wide; hilum minute, 
