TnbuhM.] XXVII. ZYGOPHYLLE^. 173 



small, on slender pedicels. Petals oblong. Stamens usually 5, with globose or 

 ovoid perfect anthers, and 5 small with imperfect capitate anthers, or entirely 

 wanting. Ovules solitary in each cell of the ovary. Fruit pyramidal, 1 to 1-j 

 line long, with 2 small tubercles at the base of each coccus. — Trihulopia pentandra, 

 R. Br. in App. Sturt Bxped. 7 ; F. v. M. Fragm. i. 48 ; Trihulm Bruimii, 

 F. v. M. PI. of Vict. i. 99. 



Hab.: Islands of the Gulf of Carpentaria, B,. Br. (Benth. I.e.) 



6. T. Solandri (after Dr. Solander), F. v. M. PL Vict. i. 99 (partly) ; Benth. 

 Fl. Austr. i. 290. An annual, with prostrate or ascending stems, pubescent or 

 nearly glabrous. Leaves alternate ; leaflets usually 3 pairs, rarely 2 pairs, 

 obliquely ovate or oblong-falcate, 3 to 6 lines long, the lowest pair distant from 

 thg stem and nearly of the size of the others, all glabrous except the ciliate 

 margins or slightly hairy, those of the upper leaves sometimes narrower and 

 lanceolate. Flowers small. Stamens usually all perfect, with small anthers. 

 Fruit pyramidal, about 3 lines long, glabrous or slightly tomentose, with 2 pairs 

 of prominent reflexed tubercles below the middle of each coccus. — Tribulopis 

 Solandri, R. Br. in App. Sturt Exp. 7. 



Hab.: GiVoexi 'BiV/ex, F. v. ibieller ; Endeavour Eiver, Bfmfa ; Lizard Island, Jlf'GiZJiwraj/. 



7. T. angustifolius (narrow-leaved), Benth. Fl. Austr. i. 290. Annual or 

 sometimes forming a perennial rootstock, with procumbent, ascending, or erect 

 stems, glabrous or silky-pubescent. Leaves all alternate ; leaflets 4 or 5 pairs or 

 sometimes more, linear, attaining lin. in length, more or less silky-pubescent. 

 Flowers large, the petals usually exceeding \m. Stamens all perfect, with 

 small anthers. Fruit 3 lines long, beside the rigid persistent style, which is 

 about as long, with 2 minute tubercles at the base of each coccus. — Tribulopis 

 angustifolia, R. Br. App. Sturt Exped. 7 ; Tribulopis Solandri, F. v. M. Fragm. i. 

 47 ; Tribulus Solandri, var. angustifolia, F. v. M. PI. Vict. i. 99. 



Hab.: Islands of the Gulf of Carpentaria, R. Br. (Benth. I.e.) 



8. T. leptophyllus (slender-leaved), Bail. Bot. Bull. 3 A procumbent silky- 

 pubescent annual extending 2 or more feet. Leaves all alternate ; leaflets 2 or 3 

 pairs, linear, the end ones the longest, often attaining over lin. length. Flowers 

 small, yellow, on filiform pedicels, often as long or nearly as long as the leaves. 

 Petals under 3 lines long. Stamens 5, perfect anthers, and 5 smaller ones with 

 imperfect capitate anthers, ovary silky. Fruit tomentose, mixed with long hairs, 

 3 lines long, pyramidal. Style rigid, persistent, about half as long as the fruit ; 

 coccus tubercles basal. 



Hab.: Walsh Eiver, T. Barclay-Millar. 



This new species is very closely allied to T. angustifolius, Benth., differing from that species 

 in the less number of leaflets, in its small yellow flowers, and in only half the stamens having 

 perfect anthers. 



9. T. minutus (small), Leichh.; Benth. Fl. Austr. i. 291. Pubescent, 

 apparently prostrate, and more slender than any other species. Leaves mostly 

 opposite, those of each pair unequal or one occasionally abortive, the larger one of 

 3 to 5 pairs of obovate or oblong leaflets, about 2 or rarely 3 lines long. Flowers 

 very small. Stamens 10, with the anthers all similar. Glands prominent. 

 Ovules solitary (or sometimes 2 ?) in each cell. Fruit nearly of T. Solandri, but 

 smaller ; each carpel bearing a pair of small, reflexed, conical spines about the 

 middle, and a pair of minute tubercles lower down. 



Hab.: ? Leichhardt Expedition. 



This species Bentham considered to connect the two groups, having the opposite leaves gf 

 Trilvlus proper, with the fruit of Tribulopis. 



