Species.
D a vie sia
Bæckia
Ha lo ra g is
Cryptandra
Pomaderria
Banksia
Trichinium
Cyperus
Dampiera
I so lep is
Dodonæa
Gompkolobiu
Dülvrynia
Cassinia
M elaleu ca .
Acacia
Stylidium .
Hakea
Grevillea
Leucopogon
♦Dryandra .
D a vie sia
♦P e trop b ila
E u ca ly p tu s .
♦Verticordia
Dampiera .
Banksia
Drosera
♦Jacksonia
♦Calotbamnos
♦Gastrolobium
Calycotbrix
Trichinium
♦ Iso p o g o n .
Pime lea
Boronia
Conospermum
Schcenus
pe r so on ia .
♦C onostylis
X e r o te s
16 2 Ve ronica
16 0 Utr icu la ria .
16 0 H yd i'o co ty le .
15 2 Loranthus
15 0 Asperula
15 0 Lobe lia
15 0 P lan ta g o
15 1 Po ly g on um .
15 1 Conospermum
14 2 Caladenia
14 6 Sida . . .
13 1 Astro tr ich e .
13 0 Galium
13 1 Stylidium
13 0
Species.
100
99
78
75
74
70
53
48
4 6
4 6
35
31
3 0
28
28
27
27
27
2 6
26
26
25
23
23
South-western A u s tra lia .
), found .E.
0
0
0
1
0
0
0
0
0
0
0
2
0
0
0
0
0
0
1
0
1
0
0
2
0
0
0
*Chorizema
♦H em ig en ia
♦CandoUea
H ib h e r tia
Comesperma .
T e tratheca
Dodonæa . .
R e s tio . .
Trymalium
Oxylobium
Goodenia . .
M erkiusa . .
Caladenia . .
*A s tr o lom a . .
♦Andersonia
Leptome ria
T hysanotus
♦Thomasia . .
♦G en e th y llis .
Eurybia . .
♦L esehenaultia
L ogania . •
P ate rson ia . .
Chætospora
Gompholobium
P ultenæa
♦Chamælaucium
Species.
13
13
12
12
12
12
12
12
12
12
11
11
11
11
22
21
20
20
20
20
20
20
20
20
20
20
20
18
18
18
18
17
16
16
16
16
16
10
15
15
15
15
ip, found in S.W.
1
1
2
1
0
3
Sp. found in S.E.
0
0
0
0
2
1
10
0
0
0
1
1
0
0
1
1
0
0
1
0
0
0
1
0
0
1
0
). found L
0
0
0
1
0
0
1
0
0
0
3
1
5
Species. ,Sp. fouud in S.E.
*Sph®rolohium . . 11 0
♦Eutaxia . . . . 11 0
Haloragis . . . . 11 2
♦Astartea . . . . 11 0
X an th o sia . . . . 11 0
Helich rysum . . . 11 3
♦Ha lg an ia . . . . 11 0
♦Microcorys . . . 11 0
Rhagodia . . . . 2
♦Synaphea . . . . 11 0
Casuarina . . . . 11 1
♦Viminaria . . . . 11 0
o f S E . . ^ S .W . A u s tra lia .]
Species.
♦Ad en au th os . . . . 15
♦Beau for tia . . . . 14
♦A g o n is ................................ 14
P h e b a l iu m ................................ 13
♦H ypocalym na . . . 13
Trachymene . . . . 13
P o d o l e p i s ................................ 13
♦ A n a r th r ia ................................ 13
Opercularia . . . . 12
M y o p o r um ................................ 12
A t r i p l e x ................................ 12
■Cassytha . . . . . . 12
Thelymitra . . , . 12
T h is in s tr u c t iv e ta b le p u ts th e m o s t im p o r ta n t d iffe r en tia l fea tu r e s o f s o u th -e a s te rn a n d so u th w
e s te r n A u s tr a lia p r om in e n tly b e fo r e th e e y e , an d I w o u ld p o in t o u t ;— 1 . H ow g r e a tly la r g e r th e
gen e r a o f th e so u th -w e s te r n F lo r a a re, th e r e b e in g 8 0 g en e r a w ith upwards o f 1 0 sp e c ie s m it s
c o lum n , an d o n ly 5 5 iu th e so u th -e a s te r n . S. T h a t th e 6 5 g en e r a o f th e so u th -e a s te r n F lo r a co n ta in
a b o u t 1 ,2 6 0 sp e c ie s, and th e 5 5 h ig h e s t o f t h e so u th -w e s te r n 1 ,7 2 7 sp e c ie s. 3 . T h a t o f th e s e 6 5 so u th w
e s te r n g en e r a 3 6 d o n o t appear a t a ll in th e s o u th -e a s te rn b s t , an d 1 7 {mai-ked w ith a * ) are
ab so lu te ly con fin ed to th e s o u th -w e s t, or a lm o st so.
A lto g e th e r , I fin d th e p rop o r tion o f g en e r a t o sp e c ie s in th e so u th -w e s te r n F lo r a to b e 1 : 6 , and
in th e s o u th -e a s te rn 1 : 4 . T h is in c r e a sed n um h e r o f g en e r a in s o u th -e a s te rn A u s tr a lia ove r th e
so u th -w e s te r n is m a in ly d u e to th e p r e sen c e o f m o r e A n ta r c tic , E u ro p ea n , N ew Z ea lan d , an d P o ly -
n e s ia n g en e r a in th e so u th -e a s t, t o w h ic h I sh a ll h e r ea fte r a llu d e .
T h e p rop o r tion o f sp e c ie s b e lo n g in g to p e cu lia r or en d em ic g en e r a in th e so u th -w e s t is ab ou t
o u e -th ird o f tb e w h o le , au d in th e so u th - e a s t o n e -s ix th .
T h e p rop o r tion o f sp e c ie s c om m o n t o o th e r c o u n tr ie s in th e so u th -w e s t is a b o u t o n e - te n th
o f th e F lo r a , an d in th e so u th -e a s t o n e - s ix th .
T h e r e a r e a b o u t 1 8 0 g en e r a , o u t o f a b ou t 6 0 0 , in s o u th -w e s te rn A u s tr a lia th a t are e ith e r n o t
fou n d a t all in s o u th -e a s te rn , or th a t are r ep r e sen ted th e r e b y a v e ry few sp e c ie s o n ly , an d th e s e 1 8 0
gen e r a in c lu d e n ea r ly 1 ,1 0 0 sp ec ie s.
O f g en e r a lly d iifu scd A u s tr a lia n g en e r a th a t are a b s en t in th e so u th -w e s t , I find V to la , P o ly g a la ,
E p a c r is , L y c o p u s , A ju y a , S m ila x , an d E r io c a u lo u ; and o f E u r o p e a n g en e r a w h ich o c cu r in th a t
q u ar te r, h u t w h ich I lutvo n o t s e en fr om e lsew h e r e in A u str a lia , are E ch in o sp e rm um , E r itr ic h tu m ,
Orohanche , A U lienm , an d L e p tu ru s , sev e ra l o f w h ic h I su p p o se to b e in tr o d u c ed , an d , i f so , will
so o n b e fo u n d in o th e r c o lo n ie s.
T h is cu r io u s ca se o f g r e a t d iffe r en c e s in th e g en e ra aud sp e c ie s o f th e tw o qu ar te rs o f a sm a ll
c o n tin e n t, ac com p an ied b y an in c r e a sed n um b e r o f sp e c ie s in th e sm a lle r an d m or e isoLatcd q u a r te r
o f th e c o n tiiie u t, w h ich is , fu r th e r , b y fai- th e m o s t u n ifo rm in p h y s ic a l c o n d itio n s, w ill n o dou b t
ev en tu a lly b e fo u n d to offer tb e b e s t m ean s o f t e s t in g w h a tev e r th e o r y o f c r ea tio n au d d is t r ib u tio n
m a y h o e stab lish ed . I n th e m e a n tim e , th e th e o r ie s w liieh I h a v e sk e tch ed in th o e a r ly p a g e s o f tin s
E s s a y ca n n o t, in th e p r e sen t s ta te o f our g e o lo g ic a l k n ow led g e o f A u str a lia , b e b r o u g h t to bear
fu lly u p o n it. T h a t n o N a tu r a l Orde r, b u t th a t m a u y g en e ra , au d a w h o le F lo r a o f sp e c ie s, should
!
f
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