290 
FLORAL TAXONOMY. 
1. Flowers pentamerous. 
Apiculatum, vodocarpum, Kochi, hybridum. 
2. Flowers tetramerous. 
Glaucescens, crenatum, prismatothecum, Billardieri,. 
ammophilum, fruticulosum, Howitt. 
Further, the number of seeds in each cell of the capsules is. 
variable; normally one-seeded in apiculatum, ioducarpum, prisma- 
tothecum, Billardieri, fruticulosum; normally two-seeded in 
ammophilum ;. normally three- to five-seeded in glaucescens, 
crenatum, Kochii, hybridum. 
Again, the foliage conforms with one type, and consists of two 
leaflets terminating a short common petiole, which passes to a 
two-lobed leaf, in which the leaflets are continuous with the 
winged petiole (and in Z. Howitti the petioles become connate) ;. 
this latter condition is a natural transition from the former one, 
and most of the species exhibit the two conditions. The shape of 
the leaflet is subject to variation in the majority of the species ;. 
the extremes suborbicular, obovate, cuneate, and Jinear-lanceolate. 
Micromorphs as regards the corolla are not infrequent. 
I have been much concerned as to whether or not the pheno- 
menon of hybridization or that of dimorphism could explain the 
differential characters of the two new species, but I think that a 
study of the following tabular summary of the chief differential 
characters among the Australian species should remove all doubts. 
thereon. I may add that the new species have been under careful 
observations by Mr. Koch for at least two years, and upon an 
abundance of living material :— 
| 
Direction | Length of 
i , Shape of 
Filaments.|-Flowers. | “Penit. ‘lof Fruit. | Stalke.* |No. Seads- 
.| a a] os 21a in each 
— By weal 5 |e BS) aad | de ee 
of = oad & = O13 ° me =] 
= g| 2 o|§ 2/2 o| 9° S 
= A = = = or) = ry} = 4 
= Se Vow) < 2) = 2 
| Bs 1 273-65. 
Par 
Apiculatum = ° : SOK oy it as Men 2 
Glaucescens . etl % * | * = [a oi R.A 
Crenatum * rs x |. x x | « | Sigade 
Todocarpum * é : # ) * Me ee «sees 
Prismatothecum . * ae eh ite * | * CORRES Go 
Kochii .. - 3: : * jos ats | Sete 
Hybridum x aay) 0 : = | F maa ee oe a 
Billardieri : * x | 3 _|* : Pan yee 
Ammophilum a Ftd, t ine one saa) ZF 
Fruticulosum : x1 a x * a ls Pg ee 
Howitti ... Sas % ol ge tel * | * sa] a ad ba ree 
* The length of the fruiting peduncle in relation to the petiole of the leaf. 
— aoe 
