36 FLOEA OF TASMANIA. [Pittosporea. 
hispid, with very scattered bristles. Flowers small, |-i inch diameter ; peduncles much shorter than the leaves. The 
capsules are sometimes four-celled and four-valved — Plate VII. A. Fig. 1, 2, leaves; 3, flower; 4, the same 
with the petals removed; 5, stamen; 6, transverse section of anther; 7, pollen; 8, longitudinal section of ovary; 
9, ovule; 10, the same with the primine cut through; 11, two-celled, and 12, a four-celled capsule; 13, transverse 
section of four-celled capsule; 14, longitudinal section of capsule; 15, seed; 16, longitudinal section of ditto; 17, 
embryo : — all magnified. 
5. Tetratheca Ounnii (Hook, fil.) j ramis gracillimis elongatis diffusis prostratis glaberrimis pu- 
berulisve, foliis parvis sparsis oppositis ternisve glabratis scaberulo-pilosisve, floribus parvis breve pedicel- 
latis, antberis brevibus obtusis poro magno. — (Tab. VII. B.) {Gunn, 1944.) 
Hab. Asbestos Hills, North-west Tasmania, Gunn.—(Fl Oct.) 
A remarkably distinct-looking plant, but in my opinion a very doubtful species. Mr. Gunn however considered 
it very distinct, and called it T. gracilis, a name that is preoccupied by Steetz for a West Australian congener. 
The stems are very long (3 feet), weak, slender, diffuse, glabrous or pubescent. Leaves and flowers as in T. pro- 
cumbens, but the stamens are very short, and the flowers usually white. Mr. Gunn remarks that it was gathered 
on grassy lands and serpentine rocks, and that T. pilosa, which grew along with it, retained a totally different habit 
and appearance ; so that if a variety, its character cannot be wholly attributed to soil or situation. — Plate VII. B. 
Portion of a plant of T. Gunnii : — nat. size. 
Nat. Ord. X. PITTOSPORE^E. 
About fifty accurately known species of this Natural Order, belonging to eleven genera, are found in 
Australia, which is perhaps the head-quarters of the Order. All are endemic, and most have a very narrow 
range. Of these, the genus Pittosporum is the largest, and its species frequent the east coast, and are 
rarer to the west and south ; whereas all the other genera, especially Marianthus and Ckeiranthera, are 
more abundant on the west and south coasts. A few species are found within the Tropics and in Tasmania. 
Bursaria spinosa appears to be common to all the extratropical coasts, including Tasmania. Endlicher 
(Plant. Hiigel. p. 9) says that the genus Solly a {Billardierafusiformis, Lab., of South and West Australia) 
is also found in Tasmania; but I know of no species from that country. Putterlich also (Plant. Preiss. 
p. 203) says that he has examined an authentic specimen of Labillardiere's, gathered in Tasmania in January 
1793. Both statements probably arise from some errors that are known to have crept into Labillardiere's 
localities. 
The affinities of Pittosporece are generally considered to be with Polygalea, to which some of the genera 
are evidently allied by many characters. Their exact position is however disputed, and they have by va- 
rious authors been compared with Celastrinea, Rutacea, and Vitifem. Lindley considers that the curious 
genus Ckeiranthera allies them to Dilleniacea ; but to me it rather suggests an affinity with Tremandrea. 
Gen. I. BILLARDIERA, Smith. 
Sepala 5, aequalia, subulata. Petala in tubum apice ampliatum conniventia. Stamina 5, supra 
ovarium conniventia ; antheris oblongis. Ovarium 2-loculare ; ovulis plurimis, axi dissepiment! biseriatim 
affixis; stylo filiformi. Bacca 2-locularis, succulenta, cylindracea, brevis v. elongata. Semina plurima, 
pulpo nidulantia, subglobosa, angulata v. reniformia. — Frutices scandentes. 
The graceful plants belonging to this genus are all extratropical and chiefly Eastern ; about seven species are 
known.— Climbing, slender shrubs, with alternate, narrow, entire, exstipulate leaves and axillary pendulous yellow 
or purplish flowers. Sepals deciduous, generally small. Petals long and narrow, together forming a cylindrical 
