Western australian wildlife management program no. 21 Declared Rare and Poorly Known Flora in the Esperance District



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Flowering Period:  October - December
Distribution and Habitat
Thysanotus brachyantherus is known from the Mt Ragged-Russell Range area and about 80 km to the north-east
towards Mt Heywood.  It grows in sandy clay, clay over limestone, loam or in sandplain in low open heath associated
with 
Banksia, Dryandra or Eucalyptus species.
Conservation Status
Current:  Priority 2
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1
Mt Ragged 
Esp
Esp
NP
26.10.89
Uncommon
-
2
Mt Ragged,S 
Esp
Esp
NP
8.12.60
-
-
3
Russell Range 
Esp
Esp
NP
8.12.60
-
-
4
Mt Heywood,NE 
Esp
Esp
VCL
9.10.80
Rare
-
Response to Disturbance
Unknown
Susceptibility to Phytophthora Dieback
Unknown
Summary and Recommendations
A hot fire in February 1991 burnt the Mt Ragged region where this species is known to occur.  The species was not
found during a survey in April 1993; its response to fire is unknown.  
T. brachyantherus grows in a variety of habitats, so the taxon may be more frequent than collections indicate.  Further
survey is required.
References
Brittan (1972).

299
Thysanotus parviflorus Brittan
ANTHERICACEAE
A perennial herb with a small rootstock which is surrounded by the previous year's bracts, leaf bases and stems.  Roots
are thickened and fleshy.  The leaves and floral stems are opposed by 1 or 2 membranous bracts (about 4 cm).  Leaves
are few, narrow-linear to cylindrical (10-25 cm), hairless, and have membranous bases similar to bracts.  There is
usually only 1 cluster of flowers per plant, borne on a cylindrical stem (14-25 cm), which is either unbranched or up to
4-branched.  Inflorescences (umbels) are usually paired and have 4-6 flowers borne on stalks (8-10 mm).  The perianth
has 3 outer linear segments (7 x 1.5 mm) with a fine sharp, point; the 3 inner segments ('petals') are purple, broadly
elliptical and have long (2 mm) fringed margins.  The 6 stamens have purple anthers which are straight (not twisted) and
the inner 3 are longer than the outer 3 anthers.  The ovary is 3-locular; the style is erect and straight (3 mm).  Fruits are
cylindrical capsules (4 x 2 mm) bearing up to 6 seeds each; the black seeds have a yellow fleshy appendage (aril).
Flowering Period:  October - December
Distribution and Habitat
Thysanotus parviflorus is distributed over about 400 km from the Stirling Ranges to Cape Le Grand.  It grows in sandy
loam in low 
Eucalyptus mallee sandplain on the lower slopes of hills. 
Conservation Status
Current:  Priority 2
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1a
Cape Le Grand 
Esp
Esp
NP
19.11.79
-
-
1b
Hill 49
Esp
Esp
NP
19.11.79
-
-
2
Greens Rd 
Esp
Esp
NR
10.84
-
-
3
West Mt Barren 
Alb
Jer
NP
28.10.65
-
-
4
Stirling Ranges 
Alb
-
NP
15.10.74
-
-
5
Denmark,E 
Alb
Dnmk
MRWA Rd Res.
26.11.90
Occasional
-
6
Brookton,SSE Nar
Brktn
-
21.10.83
Occasional
-
Response to Disturbance
Unknown
Susceptibility to Phytophthora Dieback
Unknown
Summary and Recommendations
T. parviflorus is widespread along the south coast, occurring in the Stirling Range, Fitzgerald River and Cape Le Grand
National Parks, where this taxon should remain secure.  
References
Brittan (1981).

300
Trachymene croniniana F.Muell.
APIACEAE
An erect annual, 10-50 cm tall, with the stems covered in scattered, spreading, usually rigid hairs.  Leaves are palmately
divided, usually into 3 irregularly lobed segments.  Numerous (3-12) flowers are borne in umbrella-like clusters
(umbels); petals are white; sepals are absent.  Fruits are hairless, with only 1 very wrinkled fruitlet developing.
Flowering Period:  June, November
Distribution and Habitat
Trachymene croniniana is known only from two localities, about 270 km apart, in the Stirling Ranges and east of
Coujinup Hill.  It grows after fire, in grey-brown sandy clay in rocky habitats near creeks or water bodies.
Conservation Status
Current:  Priority 2
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1
Coujinup Hill,E 
Esp
Rav
VCL
25.6.83
-
Regen.
2
Salt River Rd
?Kat
?Cbk
-
14.11.82
Rare
Regen.
Response to Disturbance
According to G. Keighery (personal communication), this species occurs after hot summer fires.
Susceptibility to Phytophthora Dieback
Unknown
Summary and Recommendations
Further survey is required.
References
Blackall and Grieve (1980), Burgman (1985b).

361
C.  Priority Three Taxa
Based on the October 1992 Priority Flora List, there are 42 Priority Three taxa known from within the boundaries of the
Esperance District.  Of these, 26 taxa were located during surveys in 1992 and 1993.  New populations or sub-
populations were found for 13 taxa. 
The following taxa are not included, as current information indicates that they are not distributed in the Esperance
District:
Acacia durabilis ms
Acacia heterochroa subsp. heterochroa ms
Acacia pinguiculosa subsp. pinguiculosa ms
Acacia ?excentrica (B.R.Maslin 5463)
Adenanthos glabrescens subsp. exasperatus
Calocephalus aervoides
Grevillea fulgens
The following taxa were deleted as they were found to be another species:
Chorizema sp. Esperance (M.A.Burgman 2135)

Chorizema circinale
Eucalyptus sp. Scaddan (K.R.Newbey 8183)

Eucalyptus misella
The following taxa were renamed during the project:  
Eucalyptus sp. Mt Ney (M.I.H.Brooker 8922) [aff. diptera

Eucalyptus creta
Dryandra sp. 16 (A.S.George 9446)

Dryandra viscida

362
Acacia eremophila var. variabilis Maiden & Blakely
MIMOSACEAE
A compact rounded or low spreading shrub, 1-4 m tall.  Phyllodes ('leaves') are cylindrical (50-110 x 1-1.5 mm), rigid,
straight, commonly with a deflexed tip with a sharp rigid point, and have about 10 parallel nerves depressed below
raised internerve spaces bearing raised stomata.  The light golden flower heads are globular (3-4 mm), 20-25 flowered
and borne with 2 per axil on stalks (2-3 mm).  Legumes are linear (50 x 1.5-3 mm), raised over and constricted between
the seeds, undulate and covered in short, soft hairs.  Seeds are arranged longitudinally in the pod, elliptic (2.5-3 mm),
dark brown and have a terminal appendage (aril).
Flowering Period:  September - October
Distribution and Habitat
Acacia eremophila var. variabilis is known from a few widely distributed localities, from near Bruce Rock to
Balladonia, a range of over 500 km.  It grows in sandy habitats.
Conservation Status
Current:  Priority 3
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1a
Balladonia,W Esp
Dund
-
9.79
-
-
1b
Balladonia,W
Esp
Dund
-
9.9.76
-
-
1c
Norseman,E
Esp
Dund
-
17.11.93
Not found
-
2a
Comet Vale 
Gold
Men
-
6.9.61
-
-
2b
Menzies,S
Gold
Men
-
1975
-
-
3
Zanthus,E Gold
Blder
-
2.9.68
-
-
4
Ardath Nar
BR
-
17.12.89
-
-
Response to Disturbance
Unknown
Susceptibility to Phytophthora Dieback
Presumed not susceptible.
Summary and Recommendations
In November 1993, a survey between Norseman and Balladonia failed to locate this taxon; it may be difficult to find
unless it is flowering.  Further survey is required.

363
Acacia euthyphylla Maslin ms
MIMOSACEAE
A rounded to funnel-shaped shrub, 1-2 m tall.  Branchlets are finely ribbed, slightly flexible and lack hairs.  Phyllodes
('leaves') are linear (40-90 x 2-3 mm), narrowed towards the base, slightly thickened, erect, light green, have a fine point
at the tip, and a midrib that is only slightly raised; a gland occurs 10 mm or more from the base.  The golden flower
heads are globular (4-5 mm), 18-21 flowered, with 2 heads (raceme, 1-2 mm) borne per leaf axil on long stalks (5-8
mm).  Flowers are 5-merous with free sepals.  The shiny legumes are linear (to 60 x 3.5 mm).
Acacia euthyphylla ms is similar in appearance to A. crassiuscula and A. cupularis.  A. crassiuscula prefers granitic
habitats and has thicker dark green phyllodes with strongly raised midribs and the gland closer to the base, while
A. cupularis can be distinguished by the blunt or callus point at the tip of the phyllodes and single flowers in the axils.  
Flowering Period:  August - September
Distribution and Habitat
A. euthyphylla ms is distributed between Truslove and Clyde Hill, a range of 120 km.  It grows in sand or clay loam in
seasonal swamps or around the margins of salt lakes, in tall myrtaceous shrubland and mallee woodland.
Conservation Status
Current:  Priority 3
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1
Truslove Esp
Esp
NR
22.9.92
2
Good
2
Cox Rd 
Esp
Esp
NR &
22.9.92
200+
Good
Shire Rd Res.
3
Lignite Rd 
Esp
Esp
Shire Rd Res.
17.11.92
20+
Fair
4
Bronzewing Rd 
Esp
Esp
-
6.9.84
-
-
5
Dempster Rd 
Esp
Esp
Shire Rd Res. & VCL
25.9.92
3000+
Good
6a
Mt Ney Rd 
Esp
Esp
NR
10.84
-
Post-fire
6b
Mt Ney Rd
Esp
Esp
?NR
3.8.83
-
-
7
?Niblick Hill 
Esp
Esp
Private
24.2.83
Common
-
8*
Truslove Rd 
Esp
Esp
Shire Rd Res.
22.9.92
5+
Good
9*
Karl Berg Rd 
Esp
Esp
Shire Rd Res.
10.10.92
30
Good
10*
Dingo Rock,S 
Esp
Esp
VCL
22.5.93
1000+
Good
* = new population
Response to Disturbance
Unknown
Susceptibility to Phytophthora Dieback
Presumed not susceptible.
Summary and Recommendations
A. euthyphylla ms is widespread at the northern limit of agriculture, north-east of Esperance.  It is known to occur in two
Nature Reserves and in Crown Land which is not currently threatened by clearing for agriculture.

364
Acacia moirii subsp. dasycarpa Maslin
MIMOSACEAE
A low, compact shrub, 30-60 cm tall, which is densely covered in long white hairs.  Leaves (6-15 mm) are bipinnate
with one pair of pinnae (5-15 mm) having 3-4 pairs of narrowly oblong to elliptic pinnules (3-6 x 2-3 mm) that are
nerveless above and 1-nerved below.  Appendages at the base of the leaves (stipules) are very narrowly triangular (4-8
mm).  The golden flower heads are globular (6-8 mm), 17-20 flowered and borne on long, hairy stalks (15-20 mm).  The
legume (up to 40 x 5-6 mm) is covered in long hairs.
Acacia moirii subsp. dasycarpa is similar to subsp. moirii which has 3-7 pairs of leaf pinnules that are hairless above
and sparsely hairy below.
Flowering Period:  April - July
Distribution and Habitat
A. moirii subsp. dasycarpa is distributed between the Hamersley River and Munglinup, mainly south of the South Coast
Highway.  A disjunct population occurs between Lake King and Newdegate.  It grows in white sand in tall open
shrubland or in stony quartzite in low heath.
Conservation Status
Current:  Priority 3
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1
Lake King-
Kat
LG
-
13.7.71
-
-
Newdegate
2
Mt Desmond 
Alb
Rav
VCL
15.12.92
100+
Healthy
3
Hopetoun,N Alb
Rav
-
10.9.70
-
-
4a
Eyre Range,W 
Alb
Rav
NP
30.5.70
-
-
4b
Eyre Range,W
Alb
Rav
NP
16.7.71
-
-
5a
Hamersley Drive 
Alb
Rav
NP
12.9.83
Occasional
-
5b
Hamersley Drive
Alb
Rav
NP
25.5.83
Common
-
6
West River 
Alb
Rav
-
3.70
-
-
7a
No Tree Hill,NE 
Alb
Rav
NP
6.8.93
20+
Disturbed
7b
No Tree Hill,NW
Alb
Rav
NP
8.10.75
-
-
8
East Mt Barren 
Alb
Rav
NP
13.4.74
-
-
9*
Vermin Proof Fence 
Alb
Rav
Shire Rd Res.
8.9.93
40+
Good
10*
Bedford Harbour Rd 
Esp
Rav
Shire Rd Verge
9.9.93
8
Vulnerable
11a* Fence Rd 
Alb
Rav
Shire Rd Res.
8.9.93
1
Good
11b
Coujinup Rd 
Esp
Rav
MRWA Rd Res.
9.9.93
10+
Disturbed
12*
Coxall Rd 
Esp
Rav
MRWA Rd Res.
9.9.93
2
Average
* = new population / sub-population
Response to Disturbance
Grows most vigorously in areas that have been disturbed.  It may be an opportunistic species that becomes less common
as plant communities mature.

365
Susceptibility to Phytophthora Dieback
Presumed not susceptible.
Summary and Recommendations
The population north-east of No Tree Hill is vulnerable to clearing for road maintenance; resurvey is required as the
track was widened in November 1993.  Monitoring of known populations is recommended.
References
Maslin (1975).

366
Acacia octonervia R.S.Cowan & Maslin
MIMOSACEAE
A low, spreading shrub, 20-50 cm tall and up to 1 m broad.  Branchlets are brownish-red.  Phyllodes ('leaves') are
cylindrical (terete, 15-20 x 1-1.5 mm) with 8 raised nerves, rigid, erect, dark green and have a fine point at the tip; an
inconspicuous gland occurs 4-10 mm from the base.  Small triangular appendages (stipules, 1.5-2 mm) are persistent at
the phyllode base.  The light golden flower heads are globular (3-4 mm), 20-flowered, with 1 or 2 borne per axil on long
stalks (7-12 mm).  Flowers are 5-merous, hairless and have free sepals.  Legumes are narrowly oblong (to 25 x 3 mm),
shiny, leathery and undulate.  Seeds are widely elliptic (2-2.5 mm long), brown and arranged longitudinally in the
legume. 
Acacia octonervia is a member of the "A. sulcata group" and is most closely related to A. sulcata which has 6- or 7-
nerved phyllodes, golden heads of 10-15 flowers and mottled seeds.
Flowering Period:  August - October
Distribution and Habitat
A. octonervia occurs in the area between the Fitzgerald and Young Rivers, with a disjunct population near Boxwood
Hill.  It grows in rocky sand or loam, or sandy clay in open mallee, dense low heath and open dwarf scrub communities. 
Conservation Status
Current:  Priority 3
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1a
West Point Rd 
Esp
Rav
Shire Rd Res.
9.9.92
20-50
Good
1b
Melaleuca Rd
Esp
Rav
Shire Rd Res.
10.9.92
1000+
Good
2
Melaleuca Rd 
Esp
Rav
?Private
21.10.68
-
-
3*
West Point Rd 
Esp
Rav
Shire Rd Res.
10.9.92
200+
Good
4*
West Point Rd 
Esp
Esp
Shire Rd Res.
11.9.92
2000+
Good
& VCL
5*
Cascades Rd 
Esp
Esp
Shire Rd Res.
11.9.92
Common
Good
6
Rawlinson Rd 
Esp
Rav
?Shire Rd Res.
20.1.81
-
-
15.9.92
Not found
-
7*
Rawlinson Rd 
Esp
Esp
Shire Rd Res.
15.9.92
200+
Good
8
Whoogerup Range 
Alb
Rav
NP
7.10.75
-
-
9
Thumb Peak 
Alb
Rav
NP
30.12.83
-
-
10
Bandalup Creek 
Alb
Rav
VCL
6.10.66
-
-
11
Middamidup Rd
?Alb
?Rav
-
9.79
-
-
12
Corackerup Alb
Jer
NR
12.82
Common
-
13
Monjebup Rd 
Alb
?Jer
Shire Rd Res.
10.76
-
-
* = new population
Response to Disturbance
Unknown

367
Susceptibility to Phytophthora Dieback
Presumed not susceptible.
Summary and Recommendations
Within the Esperance District, 
A. octonervia is common in the upper reaches of the Young River catchment area.
However, most of the known populations occur on road reserves and are vulnerable in the long term.  Occasional
monitoring is required.

368
Acacia pritzeliana C.A.Gardner
MIMOSACEAE
A shrub, up to 1 m tall, with few openly spreading branches that are covered in short white hairs.  Phyllodes are almost
cylindrical but laterally flattened (4-7 x 1.5 mm), sparsely hairy and have a spine at the tip.  Appendages at the base of
the phyllodes (stipules) are rigid and spinescent.  The golden flower heads are globular (4 mm), 20-flowered and borne
singly in the axils of phyllodes on long purplish stalks (10 mm).  Flowers are 5-merous.  Legumes are cylindrical, long
(about 65 x 3 mm), smooth, pendulous and red-brown.
Flowering PeriodMay - June
Distribution and Habitat
Acacia pritzeliana is widespread between the Young River and Mt Ragged extending northwards to Kumarl, a range of
about 250 km.  A disjunct population occurs near Spargoville.  It grows in sandy loamy soil in woodlands and mallee
scrub.  Associated species may include 
Eucalyptus salmonophloia and E. diptera.
Conservation Status
Current:  Priority 3
Known Populations
Pop.
Land
Last
No. of
No.
Population District
Shire
Status
Survey
Plants
Condition
1
Spargoville,S 
Gold
Cool
MRWA Rd Res.
5.66
-
-
2a
Mt Ragged 
Esp
Esp
NP
24.4.93
25+
Post-fire
2b*
Mt Ragged
Esp
Esp
NP
23.4.93
2
Post-fire
2c*
Mt Ragged,W
Esp
Esp
NP
24.4.93
20+
Post-fire
2d*
Mt Ragged,SW
Esp
Esp
NP
24.4.93
2
Post-fire
3
Mt Ragged,SW 
Esp
Esp
NP
17.1.66
-
-
4
Thomas River 
Esp
Esp
-
1938
-
-
5a
Clyde Hill,E 
Esp
Esp
NR
19.5.93
100+
Good
5b*
Clyde Hill,NW
Esp
Esp
NR
19.5.93
Frequent
Good
5c*
Clyde Hill,NW
Esp
Esp
VCL
20.5.93
10+
Good
6*
Clyde Hill,NW 
Esp
Esp
VCL
20.5.93
20+
Good
7a
Clyde Hill,NW 
Esp
Esp
VCL
4.83
-
-
7b*
Clyde Hill,NW
Esp
Esp
VCL
20.5.93
5+
Post-fire
7c*
Clyde Hill,NW
Esp
Esp
VCL
21.5.93
10+
Good
7d*
Clyde Hill,NW
Esp
Esp
VCL
21.5.93
50+
Post-fire
7e*
Mt Heywood,NE
Esp
Esp
VCL
21.5.93
5+
Good
8
Mt Ney,NE 
Esp
Esp
VCL
21.5.93
10+
Good
9
Mt Ney,NW 
Esp
Esp
VCL
15.8.85
-
-
10a
Dingo Rock,SE 
Esp
Esp
VCL
12.5.90
Common
-
10b* Dingo Rock,S
Esp
Esp
VCL
22.5.93
3+
Good
10c* Dingo Rock,S
Esp
Esp
VCL
22.5.93
Occasional
Good
10d* Dingo Rock,S
Esp
Esp
VCL
22.5.93
10+
Good
11a
Wittenoom Hills 
Esp
Esp
NR
25.9.92
10+
Good
11b* Norwood Rd
Esp
Esp
Shire Rd Res.
25.9.92
5+
Good
12a
Scaddan East Rd 
Esp
Esp
?Shire Rd Res.
9.79
-
-
24.9.92
Not found
-
12b
Scaddan East Rd
Esp
Esp
Shire Rd Res.
24.9.92
5+
Good
12c* Scaddan East Rd
Esp
Esp
Shire Rd Res.
22.9.92
1
Fair
12d* Scaddan,S
Esp
Esp
MRWA Rd Res.
20.11.92
1
Fair
13
Scaddan,N 
Esp
Esp
MRWA Rd Res.
25.9.83
-
-

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