128 
PLANTS INDIGENOUS TO 
[Rutacea. 
pale-yellow, more or less shining*, upwards considerably dilated, nerveles_s. Placenta rhomboid-ovate, 
somewhat fleshy, or membranous at the margin, resembling the strophiole of many seeds, often only about 
| line long, livid, bearing two ovules. Seeds about line long, oblique-ovate, turgid, sometimes a little 
dotted. Testa crustaceous. Endopleura membranous, pale. Embryo slender, as long as the albumen. 
In flower during the spring. 
In close proximity of this plant is to be placed the Eriostemon serrulatus (F. M. Fragm. Phytogr. 
Austr. i. 4), found in dense forest vallies at the upper tributaries of the Buneep River. It differs chiefly in its 
greater length of leaves and in the oblique-ovate acute carpels, which are larger and terminated by a long 
straight rostrum. Notwithstanding* these discrepancies, which can be accounted for by the influence which 
a particularly wet locality may exercise on the plant, it would have been united on this occasion with E. 
Hillebrandii, if its flowers and seeds were known. It attains a height of fully 10 feet. 
All the flowers of E. Hillebrandii examined by us have the usual number of floral parts ,* but Dr. J. 
Hooker observed the calyx to be in some instances four-cleft, the number of petals then to be four, and that 
of the stamens eight. In its reduced number of ovaries this species imitates E. grandiflorus and E. Drum- 
mondi, from Western Australia. 
The species received its name in appreciation of many services rendered by Dr. Will. Hillebrand for 
promoting the investigation of the South Australian flora. 
Sriostemon umbellatus, Turcz. in Bullet, de la Soc. Imper. des Nat . de Moscou , xxii. 2, 15- 
F. 31 Fragm. Phytogr. Austr . i. 104 j Phebalium salicifolium, Adr. de Biss. Mem. Soc . Hist. Natur. ii. 1.12 
,f 1 ; P. phylicifoliimi, F. 31. in Transact. Viet. Inst. i. 32. 
Branchlets downy ; leaves lanceolate- or oblong- or elongate-linear or oblong or linear, coriaceous, blunt 
or retuse, entire or remotely denticulated, beneath very thinly grey velvet-downy, revolute at the margin, 
decurrent into the petiole; flowers axillary, pedunculate, corymbose or umbellate, rarely solitary; pedicels 
about as long as the flowers, bracteolate at the base; teeth of the minute calyx deltoid; petals yellow, 
glabrous, glandulously dotted; filaments setaceous , longer than the corolla , glabrous; anthers inappendiculate; 
style long, smooth, capillary; stigmas united, very minute; carpels subrhomboid, short-rostrate; valves of the 
endocarp forming at the junction a deltoid tooth; placenta often several times shorter than the seed, fleshy; 
seeds brown-black, polished; cotyledons nearly as long as the radicle. 
On Mount William, on the Munyang mountains, on the highest rocks of the Cobboras, on Mount 
Wellington, on the mountains at the sources of the Mitta Mitta mountains, at an elevation from 4000 to 
6000 feet; in New South Wales along rocky gullies near Botany Bay. 
A shiub, very tall and erect in lowland localities, dwarf and diffused, yet robust in alpine situations. 
Branches terete. Branchlets clothed with starry downs. Leaves in the lowland variety generally from 1 I- 2 J 
inches long, in the alpine form from £-1 inch long, shining above, ashy-grey beneath on account of its 
tegument, or in age frilly glabrescent. Corymbs or umbels simple or compound. Peduncles angular, 1 inch 
long or oftener shorter, in various degrees starry-downy. Pedicels somewhat lepidote or downy, or, particu¬ 
larly in age, glabrous, angular, hardly upwards thickened, provided at or near the base, and sometimes also 
towards the summit, with partially puberulous lanceolate-ovate or linear fugacious bracteoles. Calyx not so 
deeply cleft as in most other species. Petals narrow-lanceolate, about 2 lines long, valvate in {estivation, 
saturate- or pale-yellow, subsessile. Sepaline filaments considerably, petaline ones slightly longer than the 
coiolla. Anthers yellow, ovate-cordate, versatile, about J line long, with introrse dehiscence. Style about 
1| line long. Stigmas hardly expanding. Gynoplior exceedingly short. Ovaries 5, coherent, smooth, or 
in the alpine variety velvety. Carpels hardly 2 lines long, seldom all developed, one- rarely two-seeded, 
having their beak quite lateral in consequence of the broad expansion of the vertex forming a prominent 
innei angle, transversely veined, sometimes downy, rarely "without rostrum. Endocarp pale-yellow, shining; 
its valves more renate than cuneate. Placenta about i line long, roundish, somewhat fleshy, livid, or at 
