THE FLOEA OF THE NOETHEEN TEEEITOEY. 137 



middle, and similar but smaller bracteoles close to calyx, wMch is about 7 mm. 

 long, two lipped, lobes at least twice as long as tube, lanceolate, the upper pair 

 united higher up, forming a broad lip, the lower lobes curving over the prominent 

 keel. Petals yellow, about as long as the calyx, standard on a very short, 

 broad claw, ovate, obtuse, wings slightly shorter, oblong, membranous near 

 base, keel as long as standard with a very slender claw, sharply incurved and 

 broad and membranous below the straight beak. Pod sessile, densely pubes- 

 cent with stiff erect hairs brown on young pod at first, but yellowish on mature 

 pod, which is turgid, oblong, obtuse with a minute recurved blunt point, 2.1 

 cm. long, X 0.6 cm. thick, the pedicel enlarged under it ; funicles short, seeds 

 about 26 in pod, subreniform, astrophiolate, flattened and smooth. 



10 miles W. of Eva Downs, G. P. Hill (No. 524«), 19/8/1911. 



The obtuse pod of this plant, as well as the large beaked keel, distinguish 

 it from the other species of Isotropis. In I. Wheeleri, F. v. M., the seeds are 

 reniform, with a strongly marked network of raised lines on the surface, and the 

 pubescence is of a different character, its racemes also are terminal, and its pod 

 smaller and acute, while the leaves are tubular rather than terete and channelled 

 as described by Bentham. I. Winneskii, P. v. M., has smaller seeds, sym- 

 metrically reniform, and rugose over a broad band round the outer margin, the 

 funicle remaining attached in the narrow sinus. 



2. /. atropurpurea,F.v. M. — Hammersley Range, P. Gregory's Expedi- 

 tion ; Attack Creek, and between Mount Morphett and Bonney River, M'DouaU 

 Stuart. 



3. /. parviflora, Benth. — Islands of the Gulf of Carpentaria, R. Brown. 



16. BURTONIA, R. Be. 



Plant glabrous. Racemes 1 to 3-flowered. — 2. B. subulata. 

 Plant very hirsute. Racemes elongated, many- flowered. Leaflets very 

 numerous, small, ovate. — 1. B. polyzyga. 



1. B. polyzyga, Benth. — Between Mount Morphett and Bonney River, 

 M'DouaU Stuart. 



2. B. svbulata, Benth. — Regent's River, Brunswick Bay, N.W. Coast, A. 

 Cunningham ; Islands of the Gulf of Carpentaria, R. Brown ; Port Essington, 

 Armstrong ; Amhem's Land, P. v. Mueller. 



17. JACKSONIA, R. Be. 



[Piptomeris, Turcz.). 



Series I. Phyllodineoe. — Phyllodineous branchlets flat, rigidly coriaceous, 

 toothed or lobed, often prickly. — 2. J. dilatata. 



Series II. Bamosissimoe. — Subphyllodineous branchlets crowded, linear, 

 angular-striate, with projecting tooth-hke nodes. 



Plowers in dense terminal spikes. Calyx very hirsute. — 3. J. odontoclada. 

 Plowers in short terminal racemes. Calyx sparingly silky-pubescent. — 

 4. J. ramosissima. 



Series III. Scoparice. — Plowering branches virgate or rushlike without 

 pungent branchlets. Barren stems or branches usually similar, although oc- 

 casionally, in the lower part of the stem, much-branched flexuose or pungent. 

 Calyx-tube half as long as the lobes or longer, turbinate, 10-nerved. 



Calyx 4 fines long, the tube half as long as the lobes. — 6. J. vernicosa. 

 Calyx 2 fines long, the tube nearly as long as the lobes. — 5. J. 

 thesioides. 

 Calyx-tube very short, -without prominent nerves. — 1. J. anomala. 



