14 PLANTS INDIGENOUS TO [Billmkacem. 
Carpels membranous or coriaceous, dehiscent at their inner side along the ventral suture, with a few 
or one rarely many arillate seeds. 
Shrubs or suffruticose plants dispersed throughout Australia and Tasmania, of erect procumbent 
or climbing habit, smooth or with a variable indument often of starry hairs, with coriaceous or herbaceous 
leaves of various forms, often revolute seldom toothed at their margin, with short or obliterated petioles, 
with solitary rarely crowded or racemose hermaphroditic at last dropping flowers, which are articulated 
with the persistent often uni-bracteate and not rarely obliterated peduncle, with tender yellow 
obcordate or obovate-cuneate glabrous petals, with small mostly ovate carpels, with brown or blackish 
shining seeds and a cupular truncate jagged or fimbriate generally membranous arillus. 
The genus Pachynema, of which the only known species has been observed more recently on 
Macadam Range, differs from Hibbertia—as limited on this occasion—scarcely except in habit, thick 
filaments and solitary ovules, Hemistemma only in having part of the filaments deprived of anthers, 
and Wormia in anther-cells bursting by terminal pores and in producing stipules, v r hilst Ochrolasia, 
according to Turczaninows description, is distinguished by petals connate at the base and in lateral 
styles. This latter genus is, however, in all probability, referable to Hibbertia. Between the genera 
here drawn together under the name of Hibbertia no clear limitation exists, nor are their respective 
species separable upon habitual differences. Hemistemma show r s, according to recent discoveries, the 
same inconstancy in regard to the arrangements of its stamens as Hibbertia. 
Sect. I. Pleueandra, LabillIt. Brown, Cand. 1. c. 
Stamens unilateral. 
Hibbertia Billardierii.— Pleurandra ovata, Labill. Nov. Noll. Plant. Specim. ii. 5, t 143; P. 
parviflora, JR. Br. 1. c. ; P. astro tricha, Sieber in Sprung. Syst. Veg. iv. 191, according* to J. Nook. FI. 
Tasm. i. 16; P. scabra, It. Br. in Cand. Syst. i. 419. 
Stems erect or nearly climbing; leaves obovate or oblong-cuneate , rarely linear-oblong, with recurved 
margin, glabrous or scantily stellate-hairy or densely tomentose, above frequently asperous; peduncles of the 
length of or longer than the flowers, with a solitary terminal linear-subulate bracteole; ovaries two, tomentose- 
velutinous; carpels 1 - 2 -seeded; arillus truncate or lacerated, membranous, of more than half the length of 
the seed. 
On forest-ridges, in su r amps replete with scrub and in rocky or sandy w'ooded vallies scattered over the 
southern part of the colony; near Rivoli Bay, at Sealer’s Cove, on Mount Hunter, the Snowy River, the 
Broadrib Ranges, &c. It extends to the Glasshouse Mountains of Moreton Bay, and is known also in one 
locality at Spencer’s Gulf. 
A shrub varying from 1 to 10 feet in height, strictly erect or flaccid and accumbent to other plants, 
laiely prostrate. Branches clothed with minute floccous or with scattered starry dow r ns, or with strigose 
or copious long and soft hair. Leaves blunt, coriaceous or sublierbaceous, one-nerved, distinctly veined, 
1 ^ on 8 ’> lines broad, on short petioles, either on both pages smooth or above covered with little 
1 ougli tubercles and deciduous simple hair, or on both sides tomentose or clothed with simple and starry hair, 
their margin sometimes almost flat. Peduncles 5 -I incli long, dow r ny, slender, axillary and terminal, solitary, 
peisistent as in the other species, but after the lapse of the calyx assuming a tendril-like appearance, bearing 
at the summit a persistent bracteole, wiiiclx varies in length from 1-4 lines. Sepals scabrous and hairy, or 
strigose, or hirsute; the outer ones lanceolate-ovate, acuminate or cuspidate, 1^-3 lines long; inner ones 
often longer, nearly orbicular, blunt or pointed, with broad membranous margin; all united at the base. 
Petals obcoidate-cuneate, or broad-obcordate, as long as the calyx, or of twice or three times its length, with 
